High Boiling Point Components Research Articles

Component Effects in Binary Droplet Impact Behaviors on the Heated Plate: Comparison Study of Ethanol/Propanol and Ethanol/Water Droplets and Observation of Novel Bubble Shrinkage Phenomenon

This work aims to investigate the effect of liquid physical properties on the behavior of binary droplets impact on the heated smooth aluminum alloy plate with a high-speed imaging system. Two groups of mixed solutions with similar boiling point differences are selected as the working liquid, in which the low-boiling-point components are both ethanol and the high-boiling point components are propanol and water, respectively. Compared to the ethanol/propanol binary droplets, the experimental results show that the ethanol/water binary droplets have diverse impact phenomena and significantly broad transition boiling regimes, as well as the reduced droplet residence time and increased Leidenfrost temperature point. With the decreasing ethanol content in ethanol/water binary droplets, these effects become more prominent. For secondary atomization, the ethanol/water binary droplet undergoes parent droplet breakup into fragment droplets with larger diameters (Ds > 0.3 mm). Both binary droplets produce satellite droplets with small diameters (Ds < 0.3 mm) by puffing and ejection. In terms of the ethanol/propanol binary droplet impact, the probability of puffing is higher and the satellite droplet diameters are small. In the ethanol/water binary droplet impact, the probability of ejection is higher and the satellite droplet diameter distribution is wider. When an ethanol/water binary droplet of 25 vol.% ethanol content impacts the heated wall at Ts = 120 °C, a novel large bubble shrinkage phenomenon occurs at the late stage of droplet evaporation. This phenomenon is proposed to be relevant to the increasing surface tension and saturation temperature with decreasing ethanol content, as well as the decreasing ambient temperature above the top surface of the bubble.

The effect of biochemical composition on the renewable crude oil produced from hydrothermal liquefaction of biosolids

The accumulation of biosolids has caused significant harmful pollutants and negatively impacted nearby ecosystems and communities, which requires immediate management and regulation. Biosolids are potentially a highly productive source of renewable crude. Hydrothermal liquefaction is a promising technique to convert biosolids into renewable crude oil. However, challenges exist with optimising the HTL of biosolids, such as identifying biosolids composition and the resultant effect on the produced renewable crude. This work aims to develop and modify methods to analyse biosolids' composition and quantify the effect of biosolids' composition and specific reaction conditions on product distributions derived from HTL. Biosolids with varying compositions were processed using HTL in a batch reactor under controlled operating conditions. The analysis of the biosolids’ composition showed that few biosolids samples are close to the composition of biomass content when compared using the Van Krevelen diagram. The results also show that those biosolids with higher lipid and protein content exhibit an increase in the renewable crude yield with a larger content of low-boiling point components. However, biosolids with higher carbohydrate and insoluble lignin content produce lower renewable crude oil yield with a higher content of high-boiling point components and an increased mass fraction of solid residue.

Proposal and performance study on a component-based double-stage compression auto-cascade refrigeration cycle

It is difficult for the conventional single-stage compression auto-cascade refrigeration cycle to achieve higher refrigeration efficiency and lower refrigeration temperature, because the stream rich in high boiling point component from the phase separator bottom undergoes a single-stage compression process of high pressure lift ratio. Based on the concept of the evaporating temperature of the high/low boiling point component matching the grade compression of two streams from the phase separator, a component-baseddouble-stagecompressionauto-cascaderefrigeration (CDACR)cycle using R170/R600a is proposed in this paper. In the novel cycle, one dedicated compressor with two suction ports is used as the substitute for a conventional compressor with the sole suction port to realize grade compression process of the component of the refrigerant mixtures, and the stream enriched with high boiling point component from the separator bottom is sucked into the high-pressure suction port and undergoes the low-pressure-lift-ratio compression process, while the stream rich in low boiling point component from the separator top is sucked into the low-pressure suction port and executes the high-pressure-lift-ratio compression process, so as to cut down the compressor power consumption and obtain a lower refrigeration temperature. The mathematical model of the proposed cycle is developed to evaluate the thermodynamic performance of the system and comparisons with the conventional single-stage compression auto-cascade refrigeration (SCACR) cycle are also discussed. The results indicate that application of the component-based grade compression to the conventional auto-cascade refrigeration cycle dramatically improves the performance of the CDACR cycle, and there is optimum composition ratio of refrigerant mixtures for the CDACR cycle to obtain the highest coefficient of performance (COP). It is also shown that the performance of the CDACR cycle is significantly better than that of the SCACR cycle. As compared with those of the SCACR cycle, the compressor power consumption of the CDACR cycle decreases by 44.83%-53.17%, and its COP increases by 0.34–0.43, as the evaporating temperature at the evaporator outlet ranges from −60°C to −40°C. In addition, at the condenser outlet temperature in the range of 26°C- 40°C, the compressor power consumption for the proposed cycle is 37.74%-47.03% lower than that for the SCACR cycle, while COP of the CDACR cycle is 0.29–0.42 higher than that of the SCACR cycle.

Prediction of solid formation conditions in mixed refrigerants with iso-pentane and methane at high pressures and cryogenic temperatures

High boiling-point components in mixed refrigerants can improve the performance of natural gas and hydrogen liquefaction facilities. However, such heavy compounds can freeze out from the refrigerant mixture, posing blockage and plant shutdown risks for cryogenic heat exchangers. To improve the predictions of these conditions, freezing and melting temperatures of pure iso-pentane and (methane + iso-pentane) binary systems were measured at temperatures down to 87.5 K and pressures up to 13 MPa. The iso-pentane melting data are compared with predictions of a thermodynamic model embedded in the ThermoFAST software package. Adjusting the model's fusion molar volume change parameter to force agreement with the measurements reduced the deviations of the experimental data from the model by over 90% relative to the default parameter value. The measured melting data for binary mixtures were used to confirm solubility predictions for iso-pentane in mixed refrigerants. Adding 20 mol% iso-pentane to a methane-rich refrigerant increases the available duty for cooling natural gas or hydrogen from (313–123) K by a factor of three. This improvement outweighs the risk of freeze-out in this refrigerant with the melting temperature being 98 K, which is 15 K lower than the minimum temperature needed for LNG production.

Thermal desorption gas chromatography-mass spectrometric analysis of polycyclic aromatic hydrocarbons in atmospheric fine particulate matter

Thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS) is used to analyze polycyclic aromatic hydrocarbons (PAHs) in atmospheric fine particulate matter. However, despite the high sensitivity of TD-GC-MS, the recovery rate of PAHs is greatly influenced by active sites in the equipment. PAHs are decomposed or adsorbed at active sites, decreasing quantitative accuracy. Also, the thermal extraction of PAHs is easily affected by the matrix in PM2.5 samples, decreasing the thermal extraction efficiency. Herein, the analytical sensitivities of PAHs were improved by adding analyte protectant (AP) and thermal desorption aid (TDA) as an auxiliary agent. The combination of 2 µL of 0.5 w/v% D-sorbitol (as AP) and 2 µL of 10 w/v% Tween®20 (as TDA) was found to be most effective in improving the analytical sensitivity of PAHs. The sensitivities of 5–6-ring PAHs with high boiling points increased most when analyzing blank filter papers added with PAHs standard sample or real samples of PM2.5 compared with the samples without the auxiliary agent. When analyzing real samples of PM2.5, the peak areas of 5-ring and 6-ring PAHs in the PM2.5 sample added with the optimized auxiliary agent were 1.40 and 1.96 times that without the auxiliary agent. It is considered that AP in the auxiliary agent covered active sites and protected PAHs undergoing decomposition or adsorption. TDA improved the thermal extraction rate of high boiling point PAHs. When using alternative heat sampling equipment to analyze low concentrations of high boiling point components, the auxiliary agent proposed herein can increase the analytical sensitivity toward the target compounds.

Quantitative measurement of mixture formation in an impinging spray of ethanol-gasoline blend under cold-start condition via UV–Vis dual-wavelength laser absorption scattering (LAS) technique

Ethanol is considered as the most promising alternative fuel for gasoline, however, the ethanol-gasoline blends used in gasoline engines usually suffer to cold-start difficulties due to the poor mixture formation. While the spray-wall interaction plays a significant role in determining the mixture formation in direct-injection spark-ignition engines (DISI), particularly for the injection occurring near the top dead center (TDC). In this study, the mixture formation of ethanol-gasoline impinging spray (E0, E85 and E100) under cold-start condition for DISI engines were investigated in a constant volume vessel. An ultraviolet (UV) – visible (Vis) dual-wavelength laser absorption scattering (LAS) technique was used to quantitatively measure the liquid and vapor phase distributions respectively. Both the toluene and methyl ethyl ketone (MEK) with the similar physical properties to gasoline and ethanol respectively, as well as with high absorption for ultraviolet were used to determine the vapor and liquid distributions. Two wall temperatures (Tw) of 298 K and 273 K were set to represent typical cold-start conditions. The results show that E100 evaporates faster than E0 before spray impingement. After impingement, E100 exhibits more sensitivity to the wall temperature, and it evaporates faster at near-wall region under Tw = 298 K. For E85 impinging spray, the evaporation of high boiling point component in gasoline is slower under Tw = 298 K than that under Tw = 273 K, probably as a result of the evaporative cooling effect by ethanol component which has higher vaporization of enthalpy. Furthermore, the results indicated that a number of liquid droplets of heavy components in gasoline remain at near-wall region as fuel film. The evaporation characteristics of E85 is significantly enhanced at the initial period of spray impingement under cold-start condition, which is potential to improve the cold-start performance.

Quantitative investigation on the spray mixture formation for ethanol-gasoline blends via UV–Vis dual-wavelength laser absorption scattering (LAS) technique

This study investigated spray mixture formation of ethanol-gasoline blends (E0, E85 and E100) under direct-injection spark ignition-like (DISI-like) condition in a constant volume vessel. An ultraviolet (UV) – visible (Vis) dual-wavelength laser absorption scattering (LAS) technique was used to quantitatively measure the liquid and vapor phase distributions. The toluene with the similar physical properties to gasoline and high absorption for ultraviolet, especially for a boiling point close to the distillation temperature of 50% mass, was employed to determine the gasoline distribution. Likewise, the ethanol distribution was determined by methyl ethyl ketone (MEK). The results show that E100 evaporates faster than E0 under high temperature condition. A similar temporal variation and level of liquid penetration length are observed for E0 and E100. In E85 spray, ethanol component has a faster evaporation than high boiling point (HBP) components in gasoline before end of injection (EOI). Meanwhile, the HBP component vapor mainly presents downstream the spray. Due to lower boiling point and higher vapor diffusivity, the ethanol component shows a larger dispersion at radial distance of the spray, as a result, it covers the inner HBP component vapor. Furthermore, the evaporation ratio of E85 increases higher than E100 at EOI and slightly after EOI, which is probably attributed to the azeotrope mixture yielded by ethanol and gasoline. This effect, however, remains insignificant until the EOI. In addition, the non-uniform distribution of blending fraction in E85 is clearly identified under different injection pressures. In the case of Pinj = 20 MPa, the dense HBP component vapor at tip region becomes significant. Meanwhile, the higher blending ratio of ethanol component presents a narrow region at spray periphery. The injection pressure shows less impacts on HBP component evaporation in E85. Whereas the evaporation of ethanol component remarkably decreases under a lower injection pressure.

Analysis and experimental study of the heterogeneous nucleation process in the boiling of mixed refrigerants

The heterogeneous nucleation process is important for the study of the nucleate boiling of the mixed refrigerants. In this paper, the onset of heterogeneous bubble nucleation of non-azeotropic mixtures was analysed based on the change in the Gibbs free energy. From the calculated results, the critical radius, change in availability, onset of boiling (ONB) superheat and heat flux were determined. The results showed that the critical radius and the maximum change in the availability of the mixtures was higher than that of the corresponding pure fluids. The ONB superheat first increased and then decreased when the mole fraction of the high boiling point component was increased. In addition, experimental tests were conducted to measure the ONB temperature and heat flux of R124, R22 and R124/R22 mixtures on a copper surface at the pressure of 0.7–0.85MPa. The ONB superheat and heat flux first increased and then decreased when the concentration of R124 was increased. Additionally, the experimental ONB superheat and heat flux were used to validate the correlations of other models as well as the model presented here. Our model shows much better agreement with the experimental data. Most of the experimental results had an error of +20% to −40%.

Preliminary investigation of experimental conditions and precision of an alternative method to determine high boiling point components in motor gasoline

This work describes a new method that can be used for the determination of high boiling point components in motor gasoline. Heavier components in the range of diesel fuel, if present in the gasoline, do not completely burn during the combustion cycle of spark ignition engines and increase exhaust emissions and deposits formation in the combustion chamber. The method used for the determination of heavy residue in gasoline is the atmospheric distillation test, according to EN ISO 3405 (similar to the classic ASTM D86) test method. The volume of distillation residue is recorded. This residue must be below 2% V/V according to EN 228 standard. The presence of heavy components is caused mainly by remnants in tanks and pipelines or bad housekeeping in the fuel distribution and supply chain. In this paper, a new alternative method is used. The residue is determined as mass percentage of the test sample after evaporation of a small quantity of the sample in a proper container put in an oven. Results show that at oven temperature of 220°C and residence time of 20min repeatable results can be obtained. The test method was also tested in gasoline sample that was intentionally mixed with automotive diesel, in concentrations up to 5% m/m, in an attempt to simulate a possible incident in the gasoline supply chain distribution system. Regarding the quantification of the amount of heavier fraction that was present in the fuel, the obtained results suggest that the new method gave better results in comparison to the classic EN ISO 3405 distillation test method.

Experimental study on a closed-loop pulsating heat pipe (CLPHP) charged with water-based binary zeotropes and the corresponding pure fluids

Pulsating heat pipe (PHP) is a relatively new and promising addition to the family of passive two-phase energy transport devices. By charging with water-methanol, water-ethanol and water-acetone zeotropic mixtures at various volume mixing ratios, a vertical closed-loop PHP has been experimentally investigated with heat input ranged from 10 W to 100 W. It was found that because of the zeotropic properties in phase transition and the complex molecular interactions between the components, the PHPs charged with the mixtures were quite more complex than those with pure fluids. At small or medium filling ratios, most of the binary mixtures had better anti-dry-out performance than at least one of the pure fluids (even both) due to the phase-change-inhibition effect (PCIE) of zeotropic mixtures where the vaporization of the high boiling point component (water) will be suppressed by the higher pressure of its counterpart abundant in the vapor slugs. At large filling ratios and high heat input, the thermal performances of the PHP charged with mixtures were generally not as good as that with the pure water possibly due to the PCIE, the flow retardance caused by the resistance to additional mass transfer and the possible increase in dynamic viscosity of the mixtures.

Selective production of chemicals from biomass pyrolysis over metal chlorides supported on zeolite

Direct biomass conversion into chemicals remains a great challenge because of the complexity of the compounds; hence, this process has attracted less attention than conversion into fuel. In this study, we propose a simple one-step method for converting bagasse into furfural (FF) and acetic acid (AC). In this method, bagasse pyrolysis over ZnCl2/HZSM-5 achieved a high FF and AC yield (58.10%) and a 1.01 FF/AC ratio, but a very low yield of medium-boiling point components. However, bagasse pyrolysis using HZSM-5 alone or ZnCl2 alone still remained large amounts of medium-boiling point components or high-boiling point components. The synergistic effect of HZSM-5 and ZnCl2, which combines pyrolysis, zeolite cracking, and Lewis acid-selective catalysis results in highly efficient bagasse conversion into FF and AC. Therefore, our study provides a novel, simple method for directly converting biomass into high-yield useful chemical.

On the role of physiochemical properties on evaporation behavior of DISI biofuel sprays

Biofuels and alternative fuels are increasingly being blended to conventional gasoline fuel to reduce the overall CO2 emissions. The effect on NOx and soot formation is still unclear as the atomization and evaporation of gasoline with biocomponents differ depending on fuel specific physiochemical properties. This work focuses on describing the biofuel evaporation behavior of gasoline sprays at homogeneous charge (early injection timing) and stratified-charge conditions (late injection timing mode) used in modern direct injection spark ignition engines (DISI). A spray plume of a 6-hole solenoid injector is analyzed in terms of liquid spray propagation, and local droplet sizes studied in an injection chamber. Depending on the operating conditions, different physiochemical properties are found to dominate the atomization and evaporation processes: For low and moderate ambient temperature and pressure, high-boiling point components show a strong influence on the spray droplet size distribution. However, at elevated temperature and pressure, the evaporation behavior changes completely. Due to a high degree of evaporation, the evaporation cooling effect dominates the local droplet sizes. Fuel mixtures owing a larger heat of vaporization show larger droplet sizes—even if these fuels have a lower boiling point. Depending on the local evaporation behavior, the different remaining droplet momentum in the spray controls the air entrainment and the subsequent progress of evaporation and mixing. Overall, it can be stated that the heat of vaporization is a dominating physiochemical property for the droplet evaporation rate at high-level supercharged conditions.

감압비등을 이용한 혼합연료의 분무제어에 관한 연구

This study was conducted to assess the spray control of flash boiling with mixed fuel in consideration of HCCI (Homogeneous Charge Compression Ignition) engine condition. Mixed fuel existing in two phase regions can control the process of mixture formation under low temperature and density by using the spray resulting from flash boiling which is able to induce rapid evaporation of fuel spray as well as the evaporation of high boiling point component. Because HCCI engine injects the fuel early under ambient conditions, it can facilitate the chemical control of ignition combustion and physical control such as breakup and atomization of liquid fuel by flash boiling of mixed fuel which consists of highly ignitable light oil and highly volatile gasoline. This study was conducted by performing video processing after selected composition and molar fraction of the mixed fuel as major parameters and photographed Schlieren image and Mie scattered light corresponding to the flash boiling phenomenon of the fuel spray that was injected inside a constant volume vessel. It was found that flash boiling causes significant changes in the spray structure under relatively low temperature and density. Thus, we analyzed that the flash boiling spray can be used for HCCI combustion by controlling the mixture formation at the early fuel injection timing.

Heat transfer during reflux condensation of an R134a/R123 mixture in vertical and inclined narrow tubular and rectangular channels

Heat transfer during reflux condensation in a narrow tube (0.007 m inner diameter, 0.5 m length) and a rectangular channel (0.007 m hydraulic diameter, 0.5 m length) was investigated. The basic mechanism of this process, i.e. removing high boiling point components from a stream of a more volatile fluid or even from inert gases, is still not sufficiently understood. The study presents experimental results with the zeotropic mixture of R134a and R123 at a constant composition of the incoming vapour of 50 mol%. The results show that both, gas side heat and mass transfer resistances and the resistances in the liquid film influence the condensation process. Channel inclination is less important in mixture condensation than in pure fluid condensation but not negligible, and increasing vapour mass flow enhances mixture condensation. Contrary to pure fluid results heat transfer in the rectangular channel with the same hydraulic diameter is much smaller than in the tube at the same vapour mass flow rate.

Sample introduction in gas chromatography using a coiled wire filament

A simple device for field sampling and concentration of analytes for subsequent introduction into an injection port for gas chromatographic (GC) analysis has been developed. It consists of a tiny, coiled platinum wire filament (CWF) that is attached to a retractable plunger wire, which fits inside a syringe needle housing. Sampling is accomplished by dipping the end of the CWF in a liquid sample, which is drawn into the wire coil by capillary action, and introducing it into the injection port either before or after allowing the solvent to evaporate. The CWF can be used with or without a nonvolatile chemical coating. A major advantage of this sampling device is that nonvolatile sample matrix components remain on the wire coil, reducing the required injection port and liner cleaning frequency and contamination of the head of the chromatographic column. The coil itself can be easily cleaned between analyses by rinsing and/or burning off residual material in a small flame. The sampling coil facilitates specifically designed chemical reactions in the injection port, such as thermochemolysis and methylation. Applications demonstrated in this work include: (1) direct introduction of samples with little or no pre-treatment, (2) simultaneous thermochemolysis and methylation of lipid-containing samples such as bacteria and bacterial endospores for analysis of biomarkers, and (3) solid phase micro-extraction (SPME) using temporary wire coatings. The CWF allowed for significant reduction in sample preparation time, in most cases to less than a few minutes. The peak shapes examined for polycyclic aromatic hydrocarbon analytes (PAHs) were significantly better (asymmetry factors <1.3) when using the CWF sampling technique compared to splitless and on-column injection techniques (asymmetry factors >1.3). Extraction efficiencies for SPME (especially for high boiling point components such as PAHs) improved by an average of 2.5 times when using the CWF compared to the performance of commercially available SPME fibers. Coiled wire filaments and GC injection port liners were used for more than 100 Bacillus endospore thermochemolysis methylation analyses without the need for cleaning or replacement.

확대촬영법 및 Mie 산란광법을 이용한 다성분연료의 분무구조에 관한 실험적 해명

The objective of this study was to analyze the effect of mixed fuel composition and mass fraction on spray inner structure in evaporating transient spray under the variant ambient conditions. Spray structure and spatial distribution of liquid phase concentration were investigated using a thin laser sheet illumination technique on the three component mixed fuels. A pulsed Nd:YAG laser was used as a light source. The experiments were conducted in a constant volume vessel with optical access. Fuel was injected into the vessel with electronically controlled common rail injector. Used fuel contains i-octane(C?H<SUB>18</SUB>), n-dodecane(C<SUB>12</SUB>H<SUB>26</SUB>) and n-hexadecane(C<SUB>16</SUB>H<SUB>34</SUB>) that were selected as low-, middle- and high-boiling point fuel, respectively. Experimental conditions are 42 ㎫, 72 ㎫ and 112 ㎫ in injection pressure, 5 ㎏/㎥, 15 ㎏/㎥ and 30 ㎏/㎥ in ambient gas density, 300 K, 500 K, 600 K and 700 K in ambient gas temperature, 300 K and 368 K in fuel temperature and different fuel mass fraction. Experimental results indicated that the multi-component fuels made two phase region mixed vapor and liquid so that it would are helpful to improve combustion, for the fuels of high boiling point component could accelerate evaporation very much according as low boiling point fuel was added to high boiling point fuel.

Mie 산란광법 및 Shadowgraph법을 이용한 다성분 혼합연료의 증발특성연구

This study was conducted to assess the effect of mixed fuel composition and mass fraction on spray inner structure in evaporating transient spray under the various ambient conditions. Spray structure and spatial distribution of liquid phase concentration are investigated using a thin laser sheet illumination technique on the multi-component mixed fuels. A pulsed Ar+ laser was used as a light source. The experiments were conducted in a constant volume vessel with optical access. Fuel was injected into the vessel with electronically controlled common rail injector. Used fuel contain i-octane(C?H₁?), n- dodecane(C₁₂H₂?) and n-hexadecane(C₁?H₃₄) that are selected as low-, middle- and high-boiling point fuel, respectively. Experimental conditions are 25Mpa, 42MPa, 72MPa and 112MPa in injection pressure, 5㎏/㎥, 15㎏/㎥ and 20㎏/㎥ in ambient gas density, 400K, 500K, 600K and 700K in ambient gas temperature, 300K and 368K in fuel temperature, and different fuel mass fraction. Experimental results indicate that the more high-boiling point component, the longer the liquid phase it were closely related to fuel physical properties, but injection pressure had no effect on. And there was a high correlation between the liquid phase length and boiling temperature at 75% distillation point.

Emissions from heated indoor dust: an approach for sample preparation and in vitro toxicity testing

A model was established to collect emissions from dust heated at 150°C and 250°C. These emissions were tested in vitro using lung epithelial cells (A549) and peripheral blood mononuclear cells (PBMCs). The volatile emissions and particles from the dust were either used for direct exposure or extracted in cell culture medium. A condensate of high-boiling point components was also tested. The direct exposure of 150°C and 250°C emissions to cells on inserts caused reduced viability and increased detachment in both cell cultures. Smoke and condensate extracts of emissions from dust heated at 250°C reduced proliferation and mitochondrial activity of A549 cells. The condensate, but not the smoke extract, reduced the viability of PBMCs. The results show that emitted compounds from heated dust have biological effects in vitro starting at 150°C. This study is a platform on which a standardized method for collecting and testing such emissions can be developed.

Effects of diesel fuel composition on SOF and PAH exhaust emissions

Experiments were performed with a six cylinder test engine using both ordinary diesel fuel and synthetic diesel fuel, which has simple hydrocarbon components and no aromatics or sulfur content. SOF is extracted from the particulate sample, then GC and GC-MS analyses were carried out. By comparing the results obtained, the role of high boiling point components in diesel fuel on SOF emission was observed. Further, by adding an artificial sulfur-containing compound and pyrene, which is a four ring polynuclear-aromatic-hydrocarbon (PAH), into the synthetic fuel, the effect of PAH content in fuel on PAH emission in SOF and the increase of SOF with increased sulfur content in fuel, were observed.

The Study of the Submicroparticle Packed Column

In this paper, a new type of high performance packed column, the submicroparticle packed column (SPPC), has been proposed. SPPC has the advantages of a microparticle packed column, high efficiency and high analytical speed, and a classical packed column, high column capacity, low cost, and easy operation. In some respects, its properties are similar to that of a capillary, which can analyze high boiling point components or wide boiling range samples at a relatively low column temperature. The height equivalent to an effective plate can be as low as 0.155 mm, and the plate number per second is 95. Moreover, the extra-column effect of the chromatographic system and its diminutiveness and the influences on column efficiency (such as average carrier gas velocity, make-up gas flow, and temperature) are also discussed in detail. SPPC is suitable for fast and trace analysis in many fields.