Gas Adsorption Characteristics Research Articles

Adsorption behavior of Pt embedded on N‐doped graphene sheets toward NO and NH3 molecules

NO and NH3 are key gases involved in the selective catalytic reduction reaction. To gain insight of gas adsorption characteristics, Pt‐decorated graphene with four different graphene‐based supports for adsorbing NO and NH3 has been investigated by first‐principles density functional theory (DFT) calculations. The adsorption structure, adsorption energy, charge distribution and electronic properties of NO and NH3 on Pt/xN‐GN surface are thoroughly explored. Additionally, density of states and Fermi softness are calculated to analyze the support effects. It is found that NO is strongly adsorbed on Pt/xN‐GN with considerable adsorption energy of 1.68–4.41 eV, while NH3 is relatively weaker adsorbed on the same catalysts with adsorption energy of 0.84–1.79 eV. In addition, Fermi softness and bond length of Pt atom and N atom of adsorbate were found to be effective descriptors of adsorption on the Pt/xN‐GN surface. Our work reveals that Pt/xN‐GN can adsorb NO and NH3 well, which may be a useful clue for following selective catalytic reduction reaction.

Adsorption characteristics of light gases on basalt rock-based zeolite 4A

The adsorption characteristics of light gases on basalt rock-based zeolite 4A (BR zeolite-4A) were systematically investigated to evaluate its potential application as an alternative adsorbent for adsorption-based separation processes. We used alkali fusion and hydrothermal procedure to prepare the nanostructured adsorbent, BR zeolite-4A, which was characterized with field emission scanning electron microscopy, X-ray diffraction, and carbon dioxide adsorption apparatus. The single component adsorption equilibrium for CO2, CH4, N2 and H2 on the BR zeolite-4A was volumetrically determined using a nanoPOROSITY adsorption analyzer at the temperature range from (288.15 to 308.15) K and pressure range from (0.1 to 110) kPa. The experimental results indicate that BR zeolite-4A showed higher adsorption capacities for CO2 compared to other light gases, indicating the suitable porous material for selective separation by adsorption. Three different isotherm equations, Langmuir, Toth, and Sips, were used to correlate the adsorption isotherm data and the most reasonable results obtained from the Sips model irrespective of the adsorption isotherm types. Isosteric heat of adsorption and adsorption energy distribution function values were calculated and used to further examine the surface energetic heterogeneity of BR zeolite-4A. The pure component adsorption isotherm results were also used to predict the adsorption selectivity for CO2/N2, CO2/CH4, CO2/H2, and CH4/H2 binary mixtures (50:50) at different pressure ranges using ideal adsorbed solution theory.

Investigation of adsorption characteristics of four toxic gases (nitric oxide, nitrogen dioxide, sulfur dioxide, and hydrogen chloride) on the inner surface of nickel-coated manganese steel cylinders and aluminum cylinders

ABSTRACT To develop standard toxic gas mixtures, it is essential to identify adsorption characteristics of each toxic gas on the inner surface of a gas cylinder. Thus, this study quantified adsorbed amounts of the four toxic gases (nitric oxide [NO], nitrogen dioxide [NO2], sulfur dioxide [SO2], and hydrogen chloride [HCl]) on the inner surface of aluminum cylinders and nickel-coated manganese steel cylinders. After eluting adsorbed gases on the inside of cylinders with ultrapure water, a quantitative analysis was performed on an ion chromatograph. To evaluate the reaction characteristics of the toxic gases with cylinder materials, quantitative analyses of nickel (Ni), iron (Fe), and aluminum (Al) were also performed by inductively coupled plasma optical emission spectrometry (ICP-OES). It was found that the amounts of NO, NO2, and SO2 adsorbed on the inner surface of aluminum cylinders were less than 1.0% at the level of 100 μmol/mol mixing ratio, whereas the signal for most heavy metal elements were below their respective detection limits. This study found that the amounts of HCl adsorbed on the inner surface of nickel-coated manganese steel cylinders were less than 5% at the level of 100 μmol/mol mixing ratio, whereas Ni (86 μmol) and Fe (28 μmol) were detected in the same cylinders. It was revealed that the adsorption mainly took place via the reaction of HCl with inner surface material of nickel-coated manganese steel cylinders. On the other hand, in the case of aluminum cylinders, the amounts of the adsorption were determined to be less than 1% at the level of HCl 100 μmol/mol mixing ratio, whereas most of Ni, Fe, and Al were detected at levels similar to their limits of detection. As a result, this study found that aluminum cylinders are more suitable for preparing HCl gas mixtures than nickel-coated manganese steel cylinders. Implications: To develop a standard toxic gas mixture, it is essential to understand the adsorption characteristics of each toxic gas inside a gas cylinder. It was found that the amounts of NO, NO2, and SO2 adsorbed inside aluminum cylinders were less than 1.0% at the level of 100 μmol/mol mixing ratio. The amounts of HCl adsorbed inside nickel-coated manganese steel cylinders were less than 5% at the level of 100 μmol/mol mixing ratio, whereas those inside aluminum cylinders were less than 1%, indicating that aluminum cylinders are more suitable for preparing HCl gas mixtures.

Factors influencing the gas adsorption thermodynamic characteristics of low-rank coal

Low-temperature nitrogen and isothermal adsorption experiments were conducted on six typical low-rank coal samples from the Fukang mining area, Xinjiang, PR China. Using different temperatures, the effects of the coal’s pore structure on gas adsorption and other thermodynamic characteristics were analyzed. The Clausius–Clapeyron equation was used to calculate the isosteric heat of adsorption, and the standard adsorption equilibrium constant was derived to calculate the adsorption free-energy and entropy. The relationships between pore structure characteristics and gas adsorption thermodynamic parameters were investigated. The results showed that the adsorption free-energy and enthalpy of the coal samples decreased with an increase in temperature. Adsorption heat and adsorption entropy were affected by an increase in pore volume and specific surface area. The specific surface area and transition pore volume exhibited quadratic relationships with the free-energy and total pore volume, whereas the mesopore volume exhibited a positive linear relationship with the adsorption free-energy. No prominent relationships among average pore diameter, adsorption heat, adsorption free-energy, and adsorption entropy were observed. No correlation was identified between micropore volume and adsorption free-energy. Fractal dimension was linearly and positively related to the adsorption heat and entropy but had no effect on the free-energy.

The effect of Ag+ cations on the micropore properties of clinoptilolite and related adsorption separation of CH4 and N2 gases

In this study, we report on the effects of Ag+ cations exchange within clinoptilolite zeolite in relation to both the physicochemical and the gas adsorption characteristics. Clinoptilolites cation-exchanged with AgNO3 to varying degrees were investigated and the influence of naturally occurring cations (Mg2+, Ca2+, K+) distributed within the material is discussed. The morphology and elemental composition of the untreated clinoptilolite and the Ag+ cation exchanged variants were characterized by XRD, EDS, FTIR, and N2 sorption experiments performed at 77 K. From the pore property analysis, we show that a slight reduction in the micropore distribution occurs for the highly exchanged Ag+ clinoptilolite compared to the untreated clinoptilolite, indicating a likely decrease in the average effective micropore size. Equilibrium adsorption isotherms of CH4 and N2 were measured at 303 K. The adsorption uptake rate of both gases was also studied and it slowed by the addition of Ag+ cations. The modified samples showed decreasing adsorption capacity for the larger CH4 gas molecule, whereas adsorption of the smaller N2 gas was less affected. This effect was most pronounced for the highly exchanged Ag+ clinoptilolite samples (AgNO3 exchange solution above 0.2M) whereby more N2 was adsorbed than CH4. At 1 atm and 303 K, the N2/CH4 equilibrium selectivity values of highly exchanged Ag+ clinoptilolite ranged from 2.8 to 7.6, which are higher than many clinoptilolite types.

Reduced graphene oxide-based broad band photodetector and temperature sensor: effect of gas adsorption on optoelectrical properties

Reduced graphene oxide (rGO) has found tremendous application due to its versatile and tunable properties. We have prepared rGO by the green hydrothermal method without using any toxic additives that comprise ~ 5–14 layers with an average interlayer distance of 3.5 A. A device with Ag-rGO-Ag configuration has been fabricated that exhibits excellent stable and reproducible photoresponse properties ranging from UV-VIS (ultraviolet-visible) to the near IR (infrared) region. Responsivity and external quantum efficiency (EQE) values are as high as 0.71, 0.733, 0.230, and 0.313 A W−1 and 57, 85, 88, and 120% using 1550, 1064, 632, and 325 nm wavelength, respectively. We have shown that the temperature-dependent resistance follows a well-definite exponential behavior which indicates potential application of rGO as temperature sensor. Overall, these results suggest that rGO can be a potential material for low-cost, environment-friendly, and efficient broadband photodetector and temperature sensor. Also, pressure-dependent optoelectrical measurements have been carried out that reveal adsorption characteristics of various gases.

Numerical modeling and experimental validation of fractional heat transfer induced by gas adsorption in heterogeneous coal matrix

Despite one fundamental issue in the adsorption theory of coalbed methane, little is known about the thermodynamic properties of gas adsorption in a porous coal matrix. In this work, considering the heterogeneity of pore structure and the exothermic characteristics of gas adsorption, a fractional heat conduction model with an unsteady volumetric heat source is proposed to study the heat transfer process induced by gas adsorption in a heterogeneous coal matrix. The heat conduction equation with a fractional time derivative is discretized by using an implicit numerical method based on the generalization of a standard finite-difference scheme. First, to validate the fractional heat conduction model, gas adsorption experiments on a microcalorimeter were carried out on 5 g coal samples of 0.3 mm diameter at 25 °C. The experimental heat flux with initial adsorption pressures of 3.23 bar, 5.83 bar and 9.77 bar increases rapidly from zero to peak values of 7.17 mW, 12.05 mW and 16.81 mW in less than 7 min (i.e., fast thermal diffusion stage) and then decreases slowly to zero again in approximately 2 h (i.e., slow thermal diffusion stage). It is revealed that for all tested gas pressures the fractional heat conduction model with a fractional order α=0.86 can reproduce the experimental process of heat flux with better accuracy than the Fourier law-based model (i.e., α=1), suggesting that anomalous thermal diffusion is the governing heat transfer process of gas adsorption in the coal matrix. Second, the spatial distribution and temporal evolution of temperature patterns with different model parameters are numerically simulated. It is found that the time to reach the peak temperature decreases from 760 s at the center of the coal particles to 490 s at the boundary. Finally, the parametric sensitivity of the thermodynamic properties of gas adsorption such as temperature, heat flux and integral adsorption heat is discussed in detail. Particularly, it is shown that as one of the most important thermodynamic parameters, the integral heat is very sensitive to the fractional order α. In the case of 3.23 bar, if α increases from0.75 to 1, while other model parameters remain unchanged, the integral heat could be enhanced from 1.1 J/g to 8.5 J/g.

Experimental study of the moisture content influence on CH4 adsorption and deformation characteristics of cylindrical bituminous coal core

Moisture content in coal is an important factor affecting the coal seam gas extraction. It directly affects the storage and flow of gas in bituminous coal. In this paper, the cylindrical bituminous coal cores of Xutuan coal mine in Huaibei coal mine group were studied as experimental objects, using the laboratory self-designed experimental device Gas Adsorption and Strain Testing Apparatus system. The influence of the bituminous coal moisture content on gas adsorption characteristics was studied. Drying experiments of coal samples showed that they lose the original moisture content following the exponential decay function of time. At wetting, the saturated moisture content in coal samples increased following the Exponential Association function of time. The experimental results show that the average original moisture content and average saturated moisture content of raw coal samples are 1.3 and 2.4%, respectively. On this basis, the gas adsorption experiments on samples with different moisture contents under different gas pressures were carried out. With the moisture content increase, the gas adsorption capacity and saturation value decreased and the decrease rate gradually reduced. The single exponential decay function describes the gas adsorption capacity dependence on moisture content. Moisture content also affects the adsorption deformation of bituminous coal. At high moisture content, the adsorption deformation of bituminous coal is less.

Thermal and gas (CH4 and C2H4) adsorption characteristics of nitric acid-treated clinoptilolite

In this study, in order to consider the effect of the time of the nitric acid treatment on thermal, structural and gas adsorption properties, clinoptilolite was modified with 1.0 M acid solutions at 80 °C for 2, 4, 6, 12 and 24 h. Structural and thermal properties of natural and acid-treated clinoptilolites were investigated by powder X-ray diffraction, X-ray fluorescence, thermogravimetric analysis, differential thermal analysis and nitrogen adsorption methods. Methane (CH4) and ethylene (C2H4) are hazardous gases for human and plant health, respectively. Therefore, some measures should be taken to reduce emissions of methane and ethylene. CH4 and C2H4 adsorption capacities of clinoptilolite (CLN) from Turkey and that of acid-treated forms at 273 K up to 100 kPa were found between 0.556–0.683 and 0.470–1.295 mmol g−1, respectively.

Characterization of Pyrolytic Graphite Sheet: A New Type of Adsorption Substrate for Studies of Superfluid Thin Films

We have measured surface morphology and gas adsorption characteristics of uncompressed pyrolytic graphite sheet (uPGS) which is a candidate substrate for AC and DC superflow experiments on monolayers of 4He below T = 1 K. The PGS is a mass-produced thin graphite sheet with various thicknesses between 10 and 100 {\mu}m. We employed a variety of measuring techniques such as imagings with optical microscope, SEM and STM, Raman spectroscopy, and adsorption isotherm. PGS has smooth and atomically-flat external surfaces with high crystallinity. Although the specific surface area (<0.1 m$^2$/g) is rather small, by making use of its smooth external surface, the thinnest uPGS of 10 {\mu}m thick is found to be suitable for the superflow experiments on the strictly two-dimensional helium systems.

Characterization of methane adsorption on shale and isolated kerogen from the Sichuan Basin under pressure up to 60 MPa: Experimental results and geological implications

A series of methane adsorption isotherms were measured at pore pressures up to 60 MPa and at 60 °C, 100 °C and 140 °C for dried and overmature Paleozoic shales and isolated kerogen from the Sichuan Basin. At first, the measured excess adsorption increases with increasing pressure, reaches a maximum value at pressures ranging between 8 and 18 MPa and then decreases. The rate of decrease reduces with increasing pressures from 18 to 60 MPa, which is attributed to the nonlinear increase of free methane density with pressure. Additionally, an unusual increase of excess adsorption at pressures from 48 to 60 MPa was observed. Both, the supercritical Dubinin-Radushkevich (SDR)-based and Langmuir-based excess adsorption models, represent the excess adsorption isotherms equally well. The fitted maximum absolute adsorption capacities, when based on raw data from 0 to 30 MPa, are larger by an average of 11.5% when compared to the raw data from 0 to 60 MPa. This deviation indicates that experimentally derived gas adsorption characteristics can be biased with respect to the maximum pore pressure used in the respective experiments. The kerogen contribution to the total methane adsorption capacity of studied Paleozoic shale samples under in-situ hydrostatic pressure and temperature conditions of main shale formations in the Jiaoshiba shale gas play is lower than 50%. However, this contribution should be larger under realistic geological conditions, especially as existent moisture will affect clays stronger than organic matter and therefore reduce the contribution of clay towards the total sorption capacity. The estimated GIP of Paleozoic shales under geological hydrostatic pressure and temperature conditions of main shale formations in the Jiaoshiba shale gas play is 5.36–6.64 cm3/g.

Support effects in single atom iron catalysts on adsorption characteristics of toxic gases (NO2, NH3, SO3 and H2S)

The effects of support on gas adsorption is crucial for single atom catalysts design and optimization. To gain insight into support effects on gas adsorption characteristics, a comprehensive theoretical study was performed to investigate the adsorption characteristics of toxic gases (NO2, NH3, SO3 and H2S) by utilizing single atom iron catalysts with three graphene-based supports. The adsorption geometry, adsorption energy, electronic and magnetic properties of the adsorption system have been explored. Additionally, the support effects have been analyzed through d-band center and Fermi softness, and thermodynamic analysis has been performed to consider the effect of temperature on gas adsorption. The support effects have a remarkable influence on the adsorption characteristics of four types of toxic gases which is determined by the electronic structure of graphene-based support, and the electronic structure can be characterized by Fermi softness of catalysts. Fermi softness and uplift height of Fe atom could be good descriptors for the adsorption activity of single atom iron catalysts with graphene-based supports. The findings can lay a foundation for the further study of graphene-based support effects in single atom catalysts and provide a guideline for development and design of new graphene-based support materials utilizing the idea of Fermi softness.

Characterization of organic-rich shales for petroleum exploration &amp; exploitation: A review-Part 1: Bulk properties, multi-scale geometry and gas adsorption

Shales, the most abundant of sedimentary rocks, are valued as the source-rocks and seals to porous petroleum reservoirs. Over the past-twenty years, organic-rich shales have also emerged as valuable petroleum systems (reservoir, seal, and source rocks contained in the same formation). As such they have become primary targets for petroleum exploration and exploitation. This Part 1 of a three-part review addresses the bulk properties, multi-scale geometry and gas adsorption characteristics of these diverse and complex rocks. Shales display extremely low permeability, and their porosity is also low, but multi-scale. Characterizing the geometry and interconnectivity of the pore-structure frameworks with the natural-fracture networks within shales is essential for establishing their petroleum exploitation potential. Organic-rich shales typically contain two distinct types of porosity: matrix porosity and fracture porosity. In addition to inter-granular porosity, the matrix porosity includes two types of mineral-hosted porosity: inorganic-mineral-hosted porosity (IP); and, organic-matter-hosted (within the kerogen) porosity (OP). Whereas, the fracture porosity and permeability is crucial for petroleum production from shales, it is within the OP where, typically, much of the in-situ oil and gas resources resides, and from where it needs to be mobilized. OP increases significantly as shales become more thermally mature (i.e., within the gas generation zones), and plays a key role in the ultimate recovery from shale-gas systems. Shales’ methane sorption capacities (MSC) tends to be positively correlated with their total organic carbon content (TOC), thermal maturation, and micropore volume. Clay minerals also significantly influence key physical properties of shale related to fluid flow (permeability) and response to stress (fracability) that determine their prospectivity for petroleum exploitation. Clay minerals can also adsorb gas, some much better than others. The surface area of the pore structure of shales can be positively or negatively correlated with TOC content, depending upon mineralogy and thermal maturity, and can influence its gas adsorption capacity. Part 2 of this three-part review considers, in a separate article, the geochemistry and thermal maturity characteristics of shale; whereas Part 3, addresses the geomechanical attributes of shales, including their complex wettability, adsorption, water imbibition and “fracability” characteristics. The objectives of this Part 1 of the review is to identify important distinguishing characteristics related to the bulk properties of the most-prospective, petroleum-rich shales.

Enhanced Selectivity for CO2 Adsorption on Mesoporous Silica with Alkali Metal Halide Due to Electrostatic Field: A Molecular Simulation Approach.

Since adsorption performances are dominantly determined by adsorbate-adsorbent interactions, accurate theoretical prediction of the thermodynamic characteristics of gas adsorption is critical for designing new sorbent materials as well as understanding the adsorption mechanisms. Here, through our molecular modeling approach using a newly developed quantum-mechanics-based force field, it is demonstrated that the CO2 adsorption selectivity of SBA-15 can be enhanced by incorporating crystalline potassium chloride particles. It is noted that the induced intensive electrostatic fields around potassium chloride clusters create gas-trapping sites with high selectivity for CO2 adsorption. The newly developed force field can provide a reliable theoretical tool for accurately evaluating the gas adsorption on given adsorbents, which can be utilized to identify good gas adsorbents.

Theoretical Approach To Model Gas Adsorption/Desorption and the Induced Coal Deformation and Permeability Change

Recovery of coalbed methane (CBM) can trigger a series of coal-gas interactions, including methane desorption, coal deformation, and associated permeability change. These processes may impact each other. A primary objective of this analysis is to simultaneously quantify these interactions and their impacts during CBM recovery. To achieve this and other objectives, a rigorously coupled adsorption–strain–permeability model was developed. Gas adsorption, coal deformation, and cleat permeability characteristics were described using simplified local density (SLD) adsorption theory, a theory-based strain model, and matchstick-based permeability models, respectively. The strain model was verified against measured methane-adsorption-induced coal strain data published during the past 60 years, and the coupled model was tested using well test data measured in the San Juan Basin of New Mexico in the United States. Results suggest that the strain model is very consistent with measured coal deformation data for fluid ...

Characterization of CPs/Ca-exchanged FAU- and LTA-type zeolite nanocomposites and their selectivity for CO2 and N2 adsorption

The objective of this study was to investigate the adsorption capacity and selectivity of CPs/Ca-exchanged FAU- and LTA-type zeolite composites for carbon dioxide (CO2), and nitrogen (N2). The adsorption isotherms of CO2 and N2 on the adsorbents were measured at 298, 323, and 348 K and with a pressure range of 0–5 bar by means of the volumetric adsorption method.Modification of zeolite using cation exchange technique was used to determine the effect of different cation on gas adsorption characteristics. Sodium cations originally present in NaX, NaY and NaA are exchanged with calcium cations. Scanning Electron Microscopy (SEM), Energy Dispersive X-ray spectroscopy (EDX), X-Ray Diffraction (XRD) and N2 adsorption/desorption isotherms were used to characterize the structure of the prepared zeolites. The addition of conducting polymers (CPs), polythiophene (PTh) and polypyrrole (PPy), to Ca-exchanged zeolites can improve the adsorption capacities of the material and at the same time increase the selectivity of the composite. CPs/Ca-zeolite nanocomposites were prepared by adding CPs to the CaX, CaY and CaA with different weight percentages p% (p = 5, 10 and 15%). CaX/PTh-15 can be used to separate CO2 from N2 due to its high adsorption selectivity for CO2 over N2.

Shale gas adsorption and desorption characteristics and its effects on shale permeability

A large proportion of shale gas is in adsorbed state. However, in the process of shale gas development, adsorbed gas in the shale pores will gradually desorb, which results in the permeability change of shale. This study aims to find out the adsorption and desorption characteristics of shale and whether there exists certain impact of desorption effects on shale permeability by experiments. Isothermal adsorption and desorption curves of shale gas are not coincident and the desorption curves are in hysteresis. Langmuir equation can be used to calculate the shale isothermal adsorption curve and desorption equation can be used to calculate the shale gas isothermal desorption curve. The permeability of shale was measured, respectively, under low pressure and high pressure, with methane and helium as experimental gas. Then, the comparison was made between the results of shale and the similar experiment results of tight gas sandstone. The results are showed as follows: adsorption effects will break the linear relationship between the shale permeability and the reciprocal of average pore pressure under low pressure; under high pressure, when gas desorption enhances, shale permeability significantly increases. Therefore, adsorption effects can impact the shale permeability under low pressure as well as under high pressure, which should be taken into consideration in the shale gas development.

Understanding the Influence of N-Doping on the CO2 Adsorption Characteristics in Carbon Nanomaterials

Compared to metal–organic frameworks and zeolites, carbon-based materials are particularly interesting for gas capture applications due to their better stability against moisture and corrosive flue gases. Increasing the accessible surface area and incorporation of heteroatoms are generally the two different strategies put forward to further enhance the adsorption characteristics of carbon materials. The influence of nitrogen incorporation on the gas adsorption characteristics, especially CO2 adsorption, is however a controversial research topic with conflicting conclusions reported by various studies. In the present work, using vertically aligned carbon nanotubes (VACNTs), we investigate for the first time the influence of N-doping on the CO2 adsorption characteristics of carbon materials. The present study aims to shed additional light on the parameters known so far as well as those that are currently not considered but are additionally responsible for gas adsorption in functionalized carbon materials. T...

Coordination change, lability and hemilability in metal-organic frameworks.

Metal-organic frameworks (MOFs) are some of the most exciting materials in current science. Their utility and diversity of applications depends on a combination of their chemistry, their framework topology and the spatial dimensions of their pores. In this review we concentrate on the chemistry of MOFs. Specifically we bring together many aspects of MOFs that underpin their stability, reactivity and dynamic behaviour within a common theme related to (changes in) metal-ligand bonding. In each area we provide examples to illustrate the behaviour and discuss it in the context of metal lability and coordination changes. Starting with flexible behaviour in which metal-linker bonds undergo deformation rather than cleavage, we then consider coordination changes that lead to open metal sites, changes in framework topology, framework dimensionality or degree of network interpenetration. We show how these changes are linked to development of new properties, including changes in magnetic behaviour, gas adsorption characteristics, construction of composite MOFs and amorphous MOFs, as well as providing new synthetic routes for MOF preparation. We discuss how the lability of the species that make up the MOFs can affect aspects from their synthesis to the possibility of metal and linker exchange reactions that may lead to defects and disorder. The final section reviews hemilability in MOFs, where regions of different chemical behaviour within MOFs can lead to unusual properties, such as self-accelerating and ultraselective adsorption.

Deformation and gas flow characteristics of coal-like materials under triaxial stress conditions

The dynamic characteristics of gas flow are often not considered in the simulation test for coal and gas outburst, making coal-like materials hard to meet the required similarity. To solve this issue, based on previous studies on the physical and mechanical properties of coal-like materials and the characteristics of gas adsorption and emission, we investigated the deformation and gas flow characteristics of coal-like materials under triaxial stress conditions using a triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling of coal containing methane. Analysis of the experimental data revealed the relationship of their stress to strain as well as the relationship of their permeability to principal stress difference and strain. In addition, a coal-like material with best seepage dynamic flow characteristics was chosen and its corresponding preparation Scheme 1 was used as the preferable scheme for preparation of class V dangerous seam. The results provide a new idea and research method for further refining preparation of materials similar to coal and gas outburst seam.