Hydrodearomatization Research Articles

Effective reduction of hydrogen consumption in ultra-deep hydrodesulfurization of diesel: Deep insights into the effect of thermodynamic limitations during hydrotreating

Reducing hydrogen (H2) consumption massively while ensuring the ultra-strict product quality is the most critical and extremely challenging issue in diesel hydrotreating process. In this work, the effect of operating parameters (including reaction temperature, reaction pressure, hydrogen/oil (H2/oil) volume ratio and liquid hourly space velocity (LHSV)) on H2 consumption were systematically studied first. Most importantly, the reduction of H2 consumption caused by temperature elevation was calculated upon satisfying the requirements of content of sulfur (S) and polycyclic aromatic hydrocarbons (PAHs) in the diesel quality standards (S≯10 mg/kg, PAHs≯7%) using feedstock with different properties. Results showed that H2 consumption was reduced by 23.1% when the temperature reached 401 °C (compared with temperature being 365 °C) using a diesel feed whose S content, N content and density were 9759.1 mg/kg, 147.1 mg/kg and 0.8626 g/cm3, respectively, while the impact on the catalysts activity, structure and coke deposition behavior was relatively little which was proven by the XPS, TEM, CAT-CS and TG-MS studies on the fresh and spent sulfide catalysts. The significant reduction of H2 consumption was attributed to the different thermodynamic behavior of S and aromatic compounds at relatively high temperature which led to a slightly decrease in hydrodesulfurization (HDS) conversion while a significantly drop in hydrodearomatization (HDA) conversion. This is a promising method to effectively reduce H2 consumption which can greatly benefit the future industrial applications in producing ultra clean diesel products with ultra-low H2 consumption.

Enhancement of Hydrodearomatization Catalyst by Brönsted Acid Site of Al2O3 Support for Clean Diesel Production

Exhaust from diesel engine contributes a main part in both PM10 and PM2.5 problem. Polycyclic aromatic hydrocarbons (PAHs) in diesel fuel should be considered because of their toxicity. Worldwide Fuel Charter recommends the PAHs content less than 2 wt.% in diesel fuel for less toxic of diesel exhaust emission. Nickle Molybdenum Sulfide over Gamma alumina (NiMoS/γ-Al2O3) catalyst is generally used in hydrotreating processes of petroleum refinery. PAHs are saturated by hydrogenation reaction (HYD) to be mono-aromatic or non-aromatic, called Hydrodearomatization (HDA) process. However, NiMoS/γ-Al2O3 catalysts still require improvements of HYD activities. Gamma alumina has been widely used as catalyst support, which generally possesses only Lewis acidity. This work focuses on surface modification of γ-Al2O3 by ammonium fluoride to generate Brönsted acidity, which could improve HYD function of NiMoS catalysts. All γ-Al2O3 supports were characterized by In-situ pyridine adsorption Diffuse Reflectance Infrared Fourier Transform spectroscopy (Pyridine-DRIFT). Increment of fluorine content in the modified γ-Al2O3 leads to increase its Brönsted acidity. The NiMoS over modified γ-Al2O3 exhibits higher HYD activities than that of the γ-Al2O3. Generation of Brönsted acidity on ϒ-Al2O3 support can enhance the HYD function of NiMoS catalyst for HDA process of clean diesel production.

Investigating the Effects of Organonitrogen Types on Hydrodearomatization Reactions over Commercial NiMoS Catalyst

The hydrogenation of polyaromatic compounds (PACs) present in mineral oils is of great importance when it comes to the desired product properties and the minimization of health hazards; however, the presence of organonitrogen inhibits the conversion of these compounds. In this study, the inhibition effects of different types of organonitrogen compounds (acridine (ACR) and carbazole (CBZ)-basic and nonbasic organonitrogen) on the hydrodearomatization (HDA) of phenanthrene over a sulfided commercial NiMo/Al2O3 catalyst were investigated in a microflow trickle-bed reactor at a temperature range of 280 to 320 °C and at a total pressure of 120 barg. Analysis of the experimental results shows that the hydrogenation of phenanthrene is significantly decreased in the presence of organonitrogen, with acridine showing stronger inhibiting effects. The extent of hydrodenitrogenation (HDN) is shown to correlate with the inhibition degree with a higher extent of HDN being achieved for carbazole than for acridine. Results from co-feeding different nitrogen types (acridine and carbazole) indicate that basic nitrogen is the dominating type of organonitrogen inhibitor. Recovery of catalyst activity in the absence of organonitrogen indicates fully reversible deactivation suggesting that inhibition relates to competitive adsorption and slower reaction rate of HDN compared to HDA.

Roles of Nanostructured Bimetallic Supported on Alumina-Zeolite (AZ) in Light Cycle Oil (LCO) Upgrading

Light cycle oil (LCO) is one of the major products in Fluid catalytic cracking (FCC) processes, and has drawbacks such as high aromatics, sulfur, and nitrogen contents, and low cetane number (CN). Hydro-upgrading is one of the most typical processes for LCO upgrading, and alumina-zeolite (AZ) is an effective hydrotreating catalyst support. This paper examined the effects of different bimetallic catalysts (CoMo/AZ, NiMo/AZ, and NiW/AZ) supported by AZ on hydro-upgrading of both model compounds and real LCO. CoMo/AZ preferred the direct desulfurization (DDS) route while the NiMo/AZ and NiW/AZ catalysts favored the desulfurization route through hydrogenation (HYD). The presence of nitrogen compounds in the feed introduced a competitive adsorption mechanism and reduced the number of available acid sites. Aromatics were partially hydrogenated into methyltetralines at first, and then further hydrogenated, cracked, and isomerized into methyldecalins, monocyclic, and methyltetralines isomers. CoMo/AZ is the best hydrodesulfurization (HDS) catalyst for the model compounds at low H2 pressure (550 psi) and for LCO at lower temperature (573 K), while NiMo/AZ performs the best for LCO at higher temperature (648 K). NiMo/AZ is the best hydrodenitrogenation (HDN) catalyst for LCO. The hydrodearomatization (HDA) performances of NiMo/AZ and NiW/AZ improved significantly and overwhelmingly higher than that of the CoMo/AZ when the H2 pressure was increased to 1100 psi.

Modelling of hydrodesulphurization in industrial trickle bed reactor using mixing cell network approach

AbstractA mixing cell network (MCN) was developed for the commercial diesel hydrodesulphurization process (DHDS) in a trickle bed reactor (TBR). The two‐phase model is developed to simulate the performance of an industrial DHDS unit. Major hydrotreating reactions such as hydrodesulphurization (HDS), hydrodearomatization (HDA), and olefin saturation were accounted for in the developed model. The MCN model predictions on axial concentration profiles of sulphur, polynuclear aromatics (PNAs), monoaromatics (MAs), and temperature were found to be in agreement with the real‐time plant data. Further, the predicted results were also compared with the plug flow model to confirm model adequacy. The results obtained in this paper show the efficacy of the MCN model in simulating multiple reactions happening in real industrial scenarios.

In Situ Hydrodeoxygenation of Guaiacol Using Magnetic Catalysts and Heterogeneous Hydrogen Producer

This research aims to figure out the effect of nickel, cobalt, iron powders and alumina-supported nickel catalyst on the hydrodeoxygenation (HDO) of guaiacol using zero-valent Zn as heterogenous hydrogen producer. The HDO tests are conducted at hydrothermal conditions in a batch micro reactor using equal amount of Zn and guaiacol feedstock, water to guaiacol ratio of 10, and catalyst load of 40 and 20 wt.% for metal powders and supported catalyst, respectively, with respect to the mass of guaiacol. Reaction time and temperature were set at 60 min and 300 oC. The fresh and exhausted supported catalysts were characterized by the XRD and SEM-EDX analyses. Among the tested commercial metal powders, Ni has the highest guaiacol conversion rate 51.3%, significantly higher than 11.8% of Fe and 20.0% of Co. Compared with metal powders, the alumina-supported nickel catalyst showed superior performance in terms of high conversion rate of 99.3% and high hydrodeoxygenation (HDO) and hydrodearomatization (HDA) efficiencies.

Development of Numerical Eulerian-Eulerian Model for Computational Analysis of Potential in Chemical Process Intensification from Trickle Bed Reactors

The computational fluid dynamics techniques keep a paramount role by evaluating a reactor performance. The transitory performance of a Trickle bed reactor is readily monitored from its three phase’s flow conditions. This research review study corresponds towards the formation of boundaries in this Trickle bed reactors system to designate its comprehensive methodology with an optimized solution. The main paramount significance of computational fluid dynamics techniques is to observe the validity and an effective significance of the experimental result. The catalyst bed is modelled with the help of dynamic and steady state models by introducing mass and energy conservation equations. The Eulerian-Eulerian multiphase modelling technique is designed for hydro-desulfurization (HDS) and hydro-dearomatization (HDA) chemical process change from interactive momentum models. The effect in bed porosity on the HDS reaction process is observed from interactive mass transfer with solid bed condition in Trickle bed reactor. The congregated results from computational fluid dynamics codes show that wetting efficiency increases with increase in both hydrogen sulphide concentration and HDS conversion. The conversion of HDS reaction decreases with increase in hydrogen disulphide (H2S) concentration at both partially wetted and wetted bed conditions. On the other hand, there is small decrease in HDS conversion from 72% to 63.75% at H2S volumetric concentration of 0 to 8%. These observations also indicate that computational fluid dynamics provides random accessibility of liquid flow in Trickle bed reactor. There results also reveal that there is periodic variation in saturated liquid phase. The regions which are close to its wall are less irrigated. These characteristics can be changed and have effect on the reactor performance. Hence, the present review study presents the unprecedented results with high accuracy.

Synthesis, Characterization, and Hydrotreating Activity of NiW Presulfurized Catalysts Prepared via a Tetrathiotungstate-Intercalated NiAl LDH.

A tetrathiotungstate-intercalated NiAl layered double hydroxide (LDH) was synthesized and then calcined under N2 at various temperatures to prepare a series of NiW presulfurized hydrotreating catalysts. Upon calcination, WS42– in the interlayer decomposes into WS3 and then WS2, releasing sulfur to sulfurize nickel in the sheets. The property and activities of catalysts for hydrodesulfurization (HDS) of dibenzothiophene and hydrodearomatization (HDA) of tetralin are dependent on the calcination temperature. At 300 °C, WS3 can be well maintained, offering highly active hydrogenation sites S22– and superior HDA activity. As the temperature increases up to 500 °C, WS3 converts into WS2, while nickel sulfides migrate to the edge of WS2 to form NiWS phases with high HDS activity. LDH-based presulfurized catalysts can achieve fully sulfurized and well-dispersed tungsten species even at high tungsten loadings and can retain more WS3 even at high temperatures because of the peculiar properties of LDHs. Therefore, they show better HDS and superior HDA activities over an oxidic NiW LDH-based catalyst (LDO) and an alumina-supported NiWS presulfurized catalyst (NiWS/Al2O3). The optimized catalyst shows 1.59 and 1.05 times higher HDS activity than LDO and NiWS/Al2O3 while 2.05 and 1.77 times higher HDA activity than LDO and NiWS/Al2O3, respectively. It also shows better HDS and HDA activity for a real diesel than a NiCoMoW/Al2O3 commercial catalyst.

Combined Extractive Dearomatization, Desulfurization, and Denitrogenation of Oil Fuels Using Deep Eutectic Solvents: A Parametric Study

Industrially, deep dearomatization of oil fuels is achieved via catalytic hydrodearomatization (HDA). However, this process suffers from several drawbacks. The most pronounced disadvantages are the...

Tuning hydrodearomatization performance of interstitial NixW alloy catalyst by controlling the doping of a small amount of tungsten

Hydrogenation is an effective way to remove polycyclic aromatic hydrocarbons (PAHs). Unfortunately, traditional hydrogenation catalysts have insufficient activities for hydrodearomatization (HDA) reaction at low reaction temperatures. In this paper, we proposed a strategy to tune the HDA performance of interstitial NixW alloy catalysts by controlling the doping of tungsten. The characterization results show that the interstitial NixW alloy catalyst could be synthesized by reducing the bimetal oxide in hydrogen at 600 °C. As a comparison, tungsten oxide can only be reduced to WO2 without the addition of nickel. It was found that the interstitial NixW-600 alloy catalysts obtained at 600 °C showed better HDA activities than those catalysts obtained at 350 °C. Interestingly, the NixW-600 catalysts had excellent HDA activities at low reaction temperature. Especially, Ni7W/MCM-600 catalyst displayed the excellent selectivity of decalin (100%) at 140 °C and WHSV = 4 h−1, but Ni/MCM and Pt/MCM catalysts had no naphthalene conversion under this condition. Finally, we found that HDA activities of the NixW/MCM catalysts are extremely related to the composition of catalysts, the molar ratio of Ni/W, and reduction temperature. This strategy opens a convenient route and provides a prospective design guideline for constructing high-performance hydrogenation catalysts.

A Facile Method to Synthesize Ni2P Catalysts and their Catalytic Performances in Hydrotreating Reactions

Abstract The bulk and supported Ni2P catalysts (Ni2P/γ-Al2O3 and Ni2P/MCM-41) were facile prepared by using nickel metal as nickel source via thermal treatment of hypophosphite in a separated reactor. The thermal decomposition behaviors of sodium hypophosphite were studied by online mass spectra. The effects of atmosphere, temperature, reaction time, and P/Ni atomic ratio on the as-prepared Ni2P catalysts were investigated. The Ni2P catalysts can also be obtained by using NiCl2 as nickel source but not for NiO. Since the nickel source is nickel metal and Ni2P catalysts were prepared in a separated reactor, the as-prepared Ni2P catalysts from Ni0 can be directly used without further purification, but the as-synthesized Ni2P catalyst from NiCl2 source should be further treated to remove the residues (such as Cl–) before use. As the active species for hydrodenitrogenation (HDN), Ni2P shows much higher activity than Ni0. For hydrodearomatization (HDA), Ni2P/MCM-41 shows much lower activity than Ni/MCM-41 but much better resistance to S-containing compounds in hydrogenation of naphthalene. The mechanism for synthesizing Ni2P catalysts with this facile method is proposed by online mass spectra.

Modelling of H2 consumption and process optimization for hydrotreating of light gas oils

AbstractHydrogen consumption regression models were developed for the hydrotreating of various light gas oil streams derived from Canadian oil sands including virgin light gas oil (VLGO), hydrocracker light gas oil (HLGO), coker light gas oil (KLGO), and a partially hydrotreated heavy gas oil (PHTHGO) stream over commercial NiMo/ɣ‐Al2O3 in a micro‐trickle bed reactor. The experiments were designed by central composite design (CCD) and covered a wide range of temperatures (353–387 °C), pressures (8.27–10.12 MPa), and liquid hourly space velocity (LHSV) (0.7–2.3 h−1), at H2/oil ratio = 600 m3 H2/m3 oil. A composite regression model comprising of all four feed streams was also developed and tested against a new batch of experimental data. The composite model compared favourably with the experimental data. In addition, the composite model fits better than similar correlations from the literature.The effects of process conditions on hydrodesulphurization (HDS), hydrodenitrogenation (HDN), and hydrodearomatization (HDA) conversions were also studied in this work. Based on the experimental data, regression models were developed for each feedstock to obtain the optimum conditions to maximize hydrotreating conversions.

Mathematical Modelling and Simulation of a Trickle-Bed Reactor for Hydrotreating of Petroleum Feedstock

Abstract In this work, a model for a trickle-bed reactor for catalytic hydrotreating (HDT) of oil fractions is developed and simulations are performed to investigate its behavior. The model considers dynamic, one-dimensional plug-flow to describe a heterogeneous, adiabatic trickle-bed reactor. It takes into consideration the main reactions present in the HDT process: hydrodesulfurization (HDS), hydrodenitrogenation (HDN), and hydrodearomatization (HDA) with a reconstructed petroleum feedstock using a practical approach of generation of pseudo-components by dividing the boiling point curves of the feedstock. The model is solved using the method of lines with a finite difference scheme for discretization in the axial direction and simulations are performed for an industrial hydrotreating unit to evaluate the behavior of the system under different conditions and assumptions e. g. related to the linear gas velocity. A study of the dynamics is carried out to investigate the behavior of the system with a change in the sulfur compound concentration of the feed. In addition, a sensitivity analysis of the most relevant model parameters is performed.

Selective hydrogenation of aromatics in coal-derived liquids over novel NiW and NiMo carbide catalysts

Novel bimetallic NiW/Al2O3 and NiMo/Al2O3 carbide catalysts were prepared by temperature-programmed reaction with CH4-H2 mixture. The catalysts were characterized by N2 adsorption, XRD, TPR and their performance for selective hydrogenation of aromatics in coal derived liquids were compared with their sulfide counterparts. Direct coal liquefaction oil (DCLO) fraction in 180∼290 °C and aromatic component separated from low temperature coal tar (LTCT) fraction in 210∼290 °C were selected as feedstock and hydrogenated on a fixed bed micro-reactor. The results of elemental analysis, simulated distillation and GC-MS show that the hydrodearomatization (HDA) activity was: NiMo-C > NiW-C > NiW-S > NiMo-S. The HDA, Hydrodenitrogenation (HDN) and hydrodesulfurization (HDS) for DCLO hydrogenation over NiMo-C is 91%, 29.54% and 75.23%, respectively. The hydroaromatics and cycloalkanes in hydrogenated LTCT and DCLO products were 67.1% and 74.8%, respectively. Thus, NiMo carbide is a promising catalyst for selective hydrogenation of CDLs to obtain high performance jet fuel blend which is rich in hydroaromatics and cycloalkanes.

Hydrodearomatization of Distillates and Heavy Naphtha over a Precious Metal Hydrogenation Catalyst and the Determination of Low Aromatic Content

Because of new regulations on the allowable aromatic content in petroleum products, the saturation of aromatics in distillates and heavy naphtha is gaining more attention. Catalytic hydrodearomatization (HDA) improves the qualities and properties of distillates for health, food, and pharmaceutical applications. In this research, the aromatic content of the four different middle distillate fractions varies from 10 to 12% volume. The goal is to saturate the aromatics to <0.1% volume at pressures, temperatures, and space velocities that are optimized for the lowest operating cost and longest catalyst life. Additionally, this study aims to determine if HDA is more favorable for processing the individual distillate cuts or the comingled products. This study also utilizes a modified high-performance liquid chromatography refractive index (HPLC-RI) method in which an ultraviolet (UV) detector is used to measure low levels of aromatics. A combination of UV and HPLC techniques was able to quantify aromatic levels as low as 0.03% v/v and 0.01% v/v, respectively.

Hydrodearomatization of Model Monoaromatics Over Ni/Al2O3: Theoretical and Experimental Approaches

Liquid phase hydrodearomatization (HDA) of monoaromatic model molecules (toluene, indane, tetralin, cyclohexylbenzene, nonylbenzene) from naphtha and middle distillate was conducted at a temperature of 170 °C and a pressure of 100 bar over Ni/Al2O3 in order to compare their reactivity separately and in mixture. A reactivity scale was established where toluene is more reactive than tetralin, indane, cyclohexylbenzene and nonylbenzene. The difference of reactivity is due to steric hindrance of the substituent and its electronic effect. In all cases, the fully hydrogenated product is the main product. Toluene hydrodearomatization is inhibited by the presence of another monoaromatics. This inhibition effect is more significant with indane than with cyclohexylbenzene and nonylbenzene and tetralin corresponding to competitive adsorptions and highlighted by kinetic modeling.

Enhancement of sulfur and nitrogen removal from heavy gas oil by using polymeric adsorbent followed by hydrotreatment

This study is focused on the challenges associated with the utilization of heavy oil as refinery feedstock. Various catalytic and non-catalytic methods to achieve higher desulfurization of feed have been widely studied in the past. In this study, we are proposing a new integrated technology that combines selective adsorption of heterocyclic sulfur and nitrogen compounds followed by catalytic hydrotreatment. Glycidyl methacrylate based polymers were developed in bulk and used as an adsorbent for the removal of nitrogen and sulfur species. In the first step, the polymeric adsorbent reduced sulfur and nitrogen content of heavy gas oil through charge transfer complex formation. Optimization of adsorption parameters was done using Taguchi orthogonal array to maximize the removal of catalyst inhibiting nitrogen heterocyclic compounds. Afterwards, hydrotreatment of polymer treated heavy gas oil was studied in a trickle-bed reactor. Functionalized polymer treated feed was hydrotreated using NiMo/γ-Al2O3 catalyst synthesized in lab with 13 wt% molybdenum and 2.5 wt% nickel, and hydrodesulfurization (HDS), hydrodenitrogenation (HDN) and hydrodearomatization (HDA) activities were measured. Experiments were performed in the temperature range of 370–390 °C, pressure of 8.96 MPa, 1 h−1 LHSV and H2/oil ratio = 600 (v/v). Prior removal of nitrogen and sulfur compounds using functionalized polymer subsequently favored the hydrotreating activity in the trickle bed reactor. Removal of refractory sulfur and nitrogen species before hydrotreatment has resulted in 94.3 wt% HDS and 63.3 wt% HDN as compared to 93.1 wt% HDS and 60.5 wt% HDN activities at optimum temperature of 390 °C. A total of 42.8% aromatic content was found in untreated HGO which decreased in the polymer pre-treated HGO. The highest HDA was observed for polymer pre-treated HGO feed at 390 °C, where the aromatic content decreased from 23.9% to 21%.

Effect of TiO2 Coating on Morphology of Active Phase on Sulfided CoMo/Al2O3 Hydrotreating Catalysts

A series of CoMo catalysts supported on various Al2O3 supports added with TiO2 were prepared to investigate the addition effect of TiO2 on formation of an active phase on sulfided CoMo/Al2O3 catalyst. The catalytic activity tests were carried out with hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene, hydrodenitrogenation (HDN) of acridine, and hydrodearomatization (HDA) of o-xylene, 1-methylnaphthalene (1-MN), and phenanthrene. A 20 wt % TiO2 added CoMoAlTi20 catalyst showed the lowest hydrogenation activity in HDA of 1-MN and phenanthrene and highest HDS and HDN activities. The property of a support and/or the interaction between active metal and the support significantly affect the formation of active sites for HDS and HDA. The active sites for HDS on sulfided CoMo catalysts were different from those for HDA and/or hydrogenation. The addition of TiO2 enhanced the reduction, the formation, and stacking number of CoMoS active slabs. The finding that desulfurization via the hydrogenation pathway ...

Synthesis of mesoporous Ti-inserted SBA-15 and CoMo/Ti-SBA-15 catalyst for hydrodesulfurization and hydrodearomatization

Ti-inserted ordered mesoporous silica SBA-15 (Ti-SBA-15) synthesized by original microwave-assisted method as a support was used to prepare CoMo catalysts to develop a new catalyst with high hydrodesulfurization (HDS) and controlled hydrodearomatization (HDA) activities. The activity tests of catalysts were carried out by using a pressurized fixed-bed flow reactor. 4,6-Dimethyldibenzothiophene (4,6-DMDBT), 1-methylnaphthalene, and phenanthrene were used as model reactants in HDS and HDA, respectively. CoMo/Ti-SBA-15 catalyst showed about 1.35 times of HDS activity and half of HDA activity of CoMo/SBA-15 catalyst. The results of XRD, FT-IR and 29Si-NMR reveal that titanium was successfully inserted into silica framework of SBA-15, and the SBA-15 mesoporous structure was maintained after insertion of titanium. The reduction of molybdenum from Mo6+ to Mo4+ readily occurred with incorporation of titanium, resulting in an increase in Mo4+ species and CoMoS phase on sulfided catalysts. This enhanced the HDS activity of CoMoTiSBA15 catalyst. Moreover, the presence of Ti3+ on CoMo/Ti-SBA-15 was observed, suggesting that TiMoS was formed and played a role as new active sites. CoMoS active slabs with shorter length and higher stacking layer were formed on CoMo/Ti-SBA-15 comparing with CoMo/SBA-15, resulting in the low HDA activity of the former.

Eco-friendly controllable synthesis of highly dispersed ZIF-8 embedded in porous Al2O3 and its hydrogenation properties after encapsulating Pt nanoparticles

In this paper, a new strategy was proposed to synthesize a novel composite of highly dispersed ZIF-8 embedded in porous Al2O3 by a solvent-free method. This is a very simple, efficient, and eco-friendly method, in which ZnO/Al2O3 was used as a precursor, and dimethyl imidazole was used as an organic ligand. Meso- and microporous composite of ZIF-8@Al2O3 was synthesized arising from the crystal growth of ZIF-8 derived from ZnO nanoparticles. Characterization results reveal that the distribution of micropores and mesopores can be controlled by simply adjusting the amount of zinc salt supported on Al2O3. The value of this composite is that it can simultaneously exert the advantages of ZIF-8 and Al2O3 support, which can significantly decrease the particle size of ZIF-8 and improve its utilization efficiency. The micropores of ZIF-8 can increase the dispersion of Pt nanoparticles, at the same time, the functional groups on the surface of Al2O3 can improve the selectivity of the product. Furthermore, this kind of composite material can be extended by replacing the support. Finally, the results of the activity tests showed that the obtained Pt/ZIF-8@Al2O3 catalyst exhibits high activity and selectivity in hydrodearomatization (HDA) and hydrodeoxygenation (HDO) reactions.