Methanol Synthesis Catalyst Research Articles

Highly Selective Production of Aromatic Hydrocarbons by CO2 Hydrogenation over Fe-Zn Oxide + H-ZSM-5 Composite Catalyst

Abstract Composite catalysts consisting of Fe-Zn oxides and H-ZSM-5 were very effective for the selective production of aromatic hydrocarbons by CO2 hydrogenation. The ratios of aromatic hydrocarbons in all hydrocarbons were beyond 80 C-mol% using these catalysts. When the weight ratio of Fe-Zn oxide and H-ZSM-5 was optimized, the ratio of aromatic hydrocarbons reached more than 90 C-mol%. The Fe-Zn oxides acted as methanol synthesis catalyst in the composite catalyst, forming aromatic hydrocarbons by methanol-to-hydrocarbons reaction over H-ZSM-5. Two aromatic hydrocarbons, p-xylene and 1,2,4-trimethylbenzene, were mainly obtained by the shape selectivity effect of H-ZSM-5. The composite catalyst deactivated by coke formation could be regenerated by air flow treatment.

Induced Reconstruction of Cuznsi Catalyst for Methanol Synthesis

Induced Reconstruction of Cuznsi Catalyst for Methanol Synthesis

Sulphur poisoning, water vapour and nitrogen dilution effects on copper-based catalyst dynamics, stability and deactivation during CO2 reduction reactions to methanol

A model of methanol synthesis catalyst deactivation dependent on pressure, temperature and composition was developed to enable flexible process optimization in the era of the variable renewable supplies.

Direct Synthesis of Dimethyl Ether on Bifunctional Catalysts Based on Cu–ZnO(Al) and Supported H3PW12O40: Effect of Physical Mixing on Bifunctional Interactions and Activity

We studied different preparation methods to synthesize a series of bifunctional hybrid catalytic systems for the direct synthesis of DME from syngas. The objective was to optimize the contact and interaction between the methanol synthesis catalyst and the methanol dehydration catalyst (Cu/ZnO/Al2O3 and H3PW12O40 supported on TiO2, respectively) by using different mixing methods (simple mixing, mixing–milling, suspension, and mixing–pressing). It has been found that the close contact between methanol synthesis and acidic functions is highly dependent on the degree of mixing of the two catalysts. In this respect, the hybrid catalyst prepared by mixing–pressing, which represents the closest contact, shows the strongest alterations in both catalytic functions. These modifications are associated with a decrease in copper surface area and a decrease in strong acid sites caused by the physical blocking of active sites or by cation exchange of the Cu2+/Zn2+ species from Cu–ZnO(Al) and the H+ from the H3PW12O40 units. The activity results demonstrated that the mixing–pressing method leading to a closer contact between the two catalytic functions led to a very low dimethyl ether time yield compared to the other bifunctional catalysts prepared by less severe mixing methods (19.4 vs 205–335 μmol/min·gcat). This work clearly indicates the importance of the mixing method in the synthesis of the hybrid catalyst to optimize the distance and interaction between the metal and acid sites.

A techno-economic and life cycle assessment for the production of green methanol from CO2: catalyst and process bottlenecks

The success of catalytic schemes for the large-scale valorization of CO2 does not only depend on the development of active, selective and stable catalytic materials but also on the overall process design. Here we present a multidisciplinary study (from catalyst to plant and techno-economic/lifecycle analysis) for the production of green methanol from renewable H2 and CO2. We combine an in-depth kinetic analysis of one of the most promising recently reported methanol-synthesis catalysts (InCo) with a thorough process simulation and techno-economic assessment. We then perform a life cycle assessment of the simulated process to gauge the real environmental impact of green methanol production from CO2. Our results indicate that up to 1.75 ton of CO2 can be abated per ton of produced methanol only if renewable energy is used to run the process, while the sensitivity analysis suggest that either rock-bottom H2 prices (1.5 $ kg−1) or severe CO2 taxation (300 $ per ton) are needed for a profitable methanol plant. Besides, we herein highlight and analyze some critical bottlenecks of the process. Especial attention has been paid to the contribution of H2 to the overall plant costs, CH4 trace formation, and purity and costs of raw gases. In addition to providing important information for policy makers and industrialists, directions for catalyst (and therefore process) improvements are outlined.

Effects of metal promotion on the performance, catalytic activity, selectivity and deactivation rates of Cu/ZnO/Al2O3 catalysts for methanol synthesis

Methanol synthesis catalysts of Cu/ZnO/Al2O3 were prepared using co-precipitation method in presence of Cr and Mg promoters. Precursors were characterized by Air-TGA and XRD. After calcination at 350 °C, catalysts were analyzed by BET and XRD. H2-TGA and H2-TPR were used to determine reduction properties of the catalysts. Co-addition of Cr and Mg resulted in the formation of larger surface area and smaller CuO particles by enhancing dispersion of CuO in the catalyst composition. Catalytic activity, selectivity and deactivation rates of synthesized catalysts were tested at 270 °C and 3 MPa for 144 h. Mg or Cr addition to the catalyst formulation reduced the methanol productivity whereas the co-addition of Cr and Mg increased the methanol productivity. At 144 h reaction time, catalysts with Mg:Cr molar ratios of 2:1 and 1:1 had the highest methanol selectivities and methanol weight time yields of 97.7 and 98.3%, and 0.53 and 0.52 gtotal methanol production gcatalyst−1 h−1, respectively. The catalysts without Cr promoter deactivated rapidly. The presence of Cr in the catalyst composition reduced deactivation rates and sintering of the catalysts. Deactivation rates of Mg and Cr co-promoted catalysts followed a cyclic trend and possible regenerative characteristics.

Effect of Different Chelating Agents on the Physicochemical Properties of Cu/ZnO Catalysts for Low-temperature Methanol Synthesis from Syngas Containing CO<sub>2</sub>

Nanostructured Cu/ZnO catalysts were prepared by a simple solid-state method, using cheap metal nitrates as raw materials. Special attention was paid to the influence of different chelating agents such as citric acid, formic acid and oxalic acid on the physicochemical properties of Cu/ZnO catalysts, which were characterized by detailed investigations. CuO crystallite size, oxygen vacancies and surface compositions were clearly affected by chelating agent types, leading to different CuO–ZnO interactions in the calcined catalysts as well as distinct reducibility. Different chelating agents also had significant effects on specific surface area, metallic Cu0 surface area, and Cu crystallite size, as well as ZnO (002) plane to ZnO (100) plane ratio (I(002)/I(100)) calculated based on the peak intensity of XRD patterns of the reduced samples, so influencing the catalytic activity for low-temperature methanol synthesis from syngas containing CO2. The structure-activity correlations, particularly the relationships between space time yield (STY) of methanol with Cu0 surface area and I(002)/I(100) ratio, were evaluated. Cu/ZnO catalyst prepared with oxalic acid showed the highest STY value, which was 2.3 and 5.3 times higher that of the catalysts obtained with citric acid and formic acid, respectively. The excellent catalytic performance was due to its greater Cu0 surface area, higher specific surface area and smaller Cu crystallite size. Stronger interactions between Cu and ZnO in the reduced samples were also favorable for enhancing catalytic activity for low-temperature methanol synthesis.

Hydrogenation of CO2 on NiGa thin films studied by ambient pressure x-ray photoelectron spectroscopy

Successful catalytic conversion of carbon dioxide into high-value chemicals, as a means of abating global CO2 emissions is a pressing challenge. Herein, we report on an ambient pressure x-ray photoelectron spectroscopy study of CO2 hydrogenation reaction using a mixed gas of CO2 and H2 at a pressure up to 0.1 mbar on polycrystalline nickel-gallium thin films prepared by vacuum co-deposition that are compositionally equivalent to Ni, Ni3Ga, Ni5Ga3 and NiGa2, which are some noted low pressure methanol synthesis catalysts. Ni film is very reactive at 300 K, with the reaction sequence initiated by facile CO2 dissociation, yielding C2O4 −2, CO3 −2, CO2 − and CO, but little HCOO− and HCO3 −. The product species observed on NiGa alloy films are not generally different from those observed from using Ni film but are now of different proportions. The NiGa2 film, with the highest Ga content, is the least reactive, as judged by a dominant molecular adsorption feature of CO2. Interestingly, the NiGa alloys are found to undergo composition change and surface restructuring induced by the reactant gas and heating during the reaction. A surface depletion of Ni and a surface enrichment of oxidic Ga are found to occur and continue unabated toward high temperature. For example, for the alloy film with a composition similar to that of Ni5Ga3 when exposed to the mixed gas at 500 K for the duration of measurements (a few h), the near surface region delimited by an XPS probing depth (3λ) of 36 Å is composed of 29% Ni, 24% Ga, and 47% oxidic Ga vs. 62% Ni, 34% Ga, and 4% oxidic Ga for the freshly prepared film at 300 K. Our study demonstrates that a complex interplay exists between the surface reactivity and the evolving chemical makeup as the alloy films are exposed to the reactive gas at elevated pressure and temperature.

Development of stable water-resistant Cu-based catalyst for methanol synthesis

Improving the stability of Cu-based catalysts, especially in the presence of water, has always been a great challenge. The hydrophobization strategy and effects on the catalyst surface property and catalytic performance deserve rigorous investigations. Herein, the hydrophobic modified silica was introduced as a support for CuZn catalyst to hinder the adsorption of water on active sites of Cu-based catalysts, thereby improving its stability. And silane agents (methyltrimethoxysilane, ethyltrimethoxysilane, propyltrimethoxysilane) were selected to modify the SiO2 surface by a reaction between the silane agent and the hydroxyl groups on the silica surface. After modification, the catalysts exhibited the better stability for methanol synthesis in the presence of water. FT-IR, BET, H2-TPR, XRD, TEM, XPS characterization were employed to determine the surface physical properties, reduction properties, crystal structure and particle size of the catalysts before and after the reaction. The results showed that water can simultaneously cause the oxidation and growth of Cu species resulting in the deactivation of Cu-based catalyst. However, the introduction of hydrophobic groups reduced the contact time between water and the active center, which prevented the growth and oxidation of Cu species, thus improving the catalyst stability.

Clariant contributes to China's carbon neutrality goal with innovative MegaMax catalyst for CO2-based methanol synthesis

The novel “Chronicle of a death foretold” by Gabriel Garcia Marquez is a story of a sudden death which could have been prevented. In 1976, within the University of Maryland basketball program and only 8 weeks apart, two athletes died suddenly during physical exertion. They were affected by hypertrophic cardiomyopathy and Marfan syndrome and in both cases an echocardiogram would have prevented the tragic epilogue. This coincidence drew everyone's attention and experts' interest on sudden death in sports.Even in recent Italian history, unexpected deaths continue to affect athletes but surprisingly any real knowledge regarding the numbers and the impact of those tragedies must take medical literature and non-medical press into consideration. Herein we report the clinical case of a 13-year-old patient with a bicuspid aortic valve, whose mother was alarmed by the news of a young boy who died because of an anomalous origin of coronary artery (AOCA) which had not been diagnosed at transthoracic echocardiography (TTE). Her obstinacy induced the physicians to repeat TTE and led to the same diagnosis in her son: actually, his right coronary artery originated from the opposite sinus of Valsalva. The suspicion was confirmed by coronary CT scan and, thanks to appropriate therapy, the boy now fares well.AOCA is the second most common cause of sudden death in young athletes. Although AOCA is often undetectable at ECG, TTE increases sensitivity of preparticipation screening. It could therefore allow us to avoid such coincidences and prevent sudden juvenile death.

Comparison of intensified reactor systems for one–step conversion of CO2–containing syngas to DME

Comparison is drawn among two intensified reactor systems proposed for meeting precise temperature regulation requirement of the direct conversion of syngas to dimethyl ether (DME). In the first (microchannel) system, reaction channels washcoated with physical mixture of catalysts for methanol synthesis (Cu–ZnO/Al2O3) and dehydration (HZSM–5) are accompanied by cooling channels. Decoupled catalytic reaction and cooling functions are conducted in interconnected adiabatic packed–bed reactors and microchannel heat exchangers, respectively, in the second (cascade) system. Both systems are compared under identical inlet conditions, catalyst types and residence times via computational modeling coupled with realistic constraints. Upon syngas (CO2/COx (COx:CO+CO2)=0.2 and H2/COx=2.0) feeding at 493 K, 50 bar and residence time of 1.05 kgcat.s/mol, conversions of CO and CO2, and DME yield are found as 27.4, 6.6 and 18.8%, respectively, for the microchannel, and 23.3, 4.6 and 13.8%, respectively, for the cascade system. At a pilot–scale gasifier syngas throughput of 0.77 mol/s, volumes of the microchannel and cascade systems, the latter being composed of five reactors and four heat exchangers, are computed as 104.5 and 56.2 liters, respectively. Productivity (molDME/m3.s) of the microchannel system (0.15) remains below that of the cascade (0.20), which, however, suffers from notable pressure drop.

Synthesis of oxygen vacancies enriched Cu/ZnO/CeO2 for CO2 hydrogenation to methanol

AbstractTernary CuO/ZnO/CeO2 catalysts for methanol synthesis from CO2 were successfully prepared and modified by electron etching with plasma as the electron source. Results indicate that the plasma decomposition leads to higher specific surface, unique structure, and the formation of copper species with a high dispersion, while enhancing reducibility of Cu particles and promoting the catalyst‐support interaction due to the especially low temperature of plasma process. Most interesting, electron bombardment produces more oxygen vacancy on CeO2, which facilitates to increase interaction between Cu, Zn, and CeO2. CO2 molecules are preferably adsorbed on the oxygen vacancies of CeO2 to generate carbonate species. Furthermore, the study shows that CeO2 is a highly tunable material, which has great catalytic potential for carbon dioxide due to its unique properties, such as rich oxygen vacancy and metal−support interaction, especially under plasma conditions. Surprisingly, Catalytic evaluation revealed that CuO/ZnO/CeO2 by plasma exhibited a remarkable space‐time yield of 162.7 g methanol·kg–1 cat·h–1 (1.5 times of that of conventional calcined catalyst) at 260 °C. © 2021 Society of Chemical Industry and John Wiley & Sons, Ltd.

Triethylamine\u2013Water as a Switchable Solvent for the Synthesis of Cu/ZnO Catalysts for Carbon Dioxide Hydrogenation to Methanol

Cu/ZnO catalyst precursors for industrial methanol synthesis catalysts are traditionally synthesised by coprecipitation. In this study, a new precipitation route has been investigated based on anti-solvent precipitation using a switchable solvent system of triethylamine and water. This system forms a biphasic system under a nitrogen atmosphere and can be switched to an ionic liquid single phase under a carbon dioxide atmosphere. When metal nitrate solutions were precipitated from water using triethylamine–water as the anti-solvent a hydroxynitrate phase, gerhardite, was formed, rather than the hydroxycarbonate, malachite, formed by coprecipitation. When calcined and reduced, the gerhardite precursors formed Cu/ZnO catalysts which showed better productivity for methanol synthesis from CO2 hydrogenation than a traditional malachite precursor, despite their larger CuO crystallite size determined by X-ray diffraction. The solvents could be recovered by switching to the biphasic system after precipitation, to allow solvent recycling in the process, reducing waste associated with the catalyst synthesis.

Influence of water vapor on the performance of Au/ZnO catalysts in methanol synthesis from CO2 and H2: A high-pressure kinetic and TAP reactor study

As part of an ongoing study on the performance and function of highly active Au/ZnO catalysts in the green synthesis of methanol, from H2 generated using renewable energies and CO2, we have systematically investigated the influence of water vapor on the reaction behavior. Water is a stoichiometric byproduct both in methanol formation and in the competing reverse water-gas shift (RWGS) reaction, and therefore its formation together with methanol formation is unavoidable. Changes in the reaction behavior, and possible physical or mechanistic reasons underlying these changes were addressed by high-pressure kinetic measurements, ex situ catalyst characterization and temporal analysis of products (TAP) reactor measurements. Already 2 % of water vapor led to a substantial but reversible lowering of both the methanol and the CO formation rate, and they decreased even more upon adding larger amounts. Possible reasons for this and consequences on the performance of Au/ZnO catalysts in this reaction are discussed.

Yttria-doped Cu/ZnO catalyst with excellent performance for CO2 hydrogenation to methanol

Revealing the origin of the enhanced performance on yttria (Y2O3) promoted Cu/ZnO based catalyst for methanol synthesis via CO2 hydrogenation is still challenging. To shed light upon the promotion effect of Y2O3 modifier on binary Cu/ZnO catalyst for CO2 hydrogenation reaction, a ternary Cu/ZnO/Y2O3 catalyst was synthesized via a citric acid coordination-assisted strategy. The developed Cu/ZnO/Y2O3 catalyst exhibited a remarkably higher Weight-time yeild of methanol (236.8 gMeOH gcat−1∙h − 1) and methanol selectivity (81.1%) in comparison to Cu/ZnO catalyst (159.6 gMeOH gcat−1∙h − 1 and 73.9%, respectively). Various characterizations results have uncovered the enhanced catalytic activity of Cu/ZnO/Y2O3 catalyst for methanol synthesis was associated with small size and highly dispersed Cu species and abundant surface adsorption sites as well as more Cu-ZnO interfaces with strong interaction. Moreover, the Cu/ZnO/Y2O3 catalyst displayed a superior weight-time yield of methanol with a time-on-stream of 100 h in comparison with classic Cu/ZnO catalyst. We anticipate that this basic design strategy will provide a novel alternative to expand opportunities to explore scalable, cost-effective catalysts for industrial methanol synthesis.

Combination of Cu/ZnO Methanol Synthesis Catalysts and ZSM-5 Zeolites to Produce Oxygenates from CO2 and H2

Cu/ZnO methanol catalysts were deposited over several ZSM-5 acid zeolites to directly synthesise oxygenates (methanol and dimethyl ether) from a CO2/H2 feed. Catalysts were prepared by two different preparation methodologies: chemical vapour impregnation (CZZ-CVI) and oxalate gel precipitation (CZZ-OG). Chemical vapour impregnation led to Cu/ZnO being deposited on the zeolite surface, whilst oxalate gel precipitation led to the formation of Cu/ZnO agglomerates. For both sets of catalysts a higher concentration of mild and strong acid sites were produced, compared to the parent ZSM-5 zeolites, and CZZ-CVI had a higher concentration of acid sites compared to CZZ-OG. Nevertheless, CZZ-OG shows considerably higher oxygenate productivity, 1322 mmol Kgcat−1 h−1, compared to 192 mmol Kgcat−1 h−1 over CZZ-CVI (ZSM-5(50), 250 ℃, 20 bar, CO2/H2 = 1/3, 30 ml min−1), which could be assigned to a combination of smaller particle size and enhanced methanol mass transfer within the zeolites.

Zeolite-Encapsulated Ultrasmall Cu/ZnOx Nanoparticles for the Hydrogenation of CO2 to Methanol.

Selective hydrogenation of CO2 to methanol is a "two birds, one stone" technology to mitigate the greenhouse effect and solve the energy demand-supply deficit. Cu-based catalysts can effectively catalyze this reaction but suffer from low catalytic stability caused by the sintering of Cu species. Here, we report a series of zeolite-fixed catalysts Cu/ZnOx(Y)@Na-ZSM-5 (Y is the mass ratios of Cu/Zn in the catalysts) with core-shell structures to overcome this issue and strengthen the transformation. Fascinatingly, in this work, we first employed bimetallic metal-organic framework, CuZn-HKUST-1, nanoparticles (NPs) as a sacrificial agent to introduce ultrasmall Cu/ZnOx NPs (∼2 nm) into the crystalline particles of the Na-ZSM-5 zeolite via a hydrothermal synthesis method. The catalytic results showed that the optimized zeolite-encapsulated Cu/ZnOx(1.38)@Na-ZSM-5 catalyst exhibited the space time yield of methanol (STYMeOH) of 44.88 gMeOH·gCu-1·h-1, much more efficient than the supported Cu/ZnOx/Na-ZSM-5 catalyst (13.32 gMeOH·gCu-1·h-1) and industrial Cu/ZnO/Al2O3 catalyst (8.46 gMeOH·gCu-1·h-1) under identical conditions. Multiple studies demonstrated that the confinement in the zeolite formwork affords an intimate surrounding for the active phase to create synergies and avoid the separation of Cu-ZnOx interfaces, which results in an improved performance. More importantly, in the long-term test, the Cu/ZnOx(1.38)@Na-ZSM-5 catalyst exhibited constant STYMeOH with superior durability benefitted from its fixed structure. The current findings demonstrate the importance of confinement effects in designing highly efficient and stable methanol synthesis catalysts.

Reduction Behavior of Cubic In2O3 Nanoparticles by Combined Multiple In Situ Spectroscopy and DFT.

Indium oxide (In2O3) has emerged as a highly active catalyst for methanol synthesis by CO2 hydrogenation. In this work we elucidate the reduction behavior and oxygen dynamics of cubic In2O3 nanoparticles by in situ Raman and UV-vis spectra in combination with density functional theory (DFT) calculations. We demonstrate that application of UV and visible Raman spectroscopy enables, first, a complete description of the In2O3 vibrational structure fully consistent with theory and, second, the first theoretical identification of the nature of defect-related bands in reduced In2O3. Combining these findings with quasi in situ XPS and in situ UV-vis measurements allows the temperature-dependent structural dynamics of In2O3 to be unraveled. While the surface of a particle is not in equilibrium with its bulk at room temperature, oxygen exchange between the bulk and the surface occurs at elevated temperatures, leading to an oxidation of the surface and an increase in oxygen defects in the bulk. Our results demonstrate the potential of combining different in situ spectroscopic methods with DFT to elucidate the complex redox behavior of In2O3 nanoparticles.

Probing Hydrophobization of a Cu/ZnO Catalyst for Suppression of Water–Gas Shift Reaction in Syngas Conversion

Due to the complexity of the structure and surface property of metal oxide catalysts, hydrophobization of metal oxide catalysts is a great challenge. The hydrophobization strategy and effects of hydrophobization on the surface property and catalytic performance of metal oxide catalysts deserve rigorous investigations. Herein, we adopt stearic acid to functionalize the surface of a Cu/ZnO catalyst by bridging stearic acid molecules with the Cu/ZnO catalyst surface. After functionalization, the hydrophobicity of the Cu/ZnO catalyst is greatly reinforced, while its structure and catalytic performance remain nearly unchanged. The hydrophobic Cu/ZnO catalyst exhibits a very positive inhibitory effect on the unfavorable water–gas shift reaction (WGSR) in one-step synthesis of dimethyl ether (DME) from syngas (CO + H2), while the catalytic activity of the hydrophobic Cu/ZnO catalyst for methanol synthesis is not affected. Lower CO2 selectivity and higher DME selectivity over the hydrophobic Cu/ZnO-4 catalyst, better than those of untreated catalyst, are obtained facilely. The promoted catalytic performance of the hydrophobic Cu/ZnO catalyst demonstrates that the surface hydrophobicity of heterogeneous catalysts is worthy of more attention for enriching their catalytic roles.

Realizing high conversion of syngas to gasoline-range liquid hydrocarbons on a dual-bed-mode catalyst

Achieving high conversion of syngas to fuels and basic chemicals with excellent selectivity and stability remains a challenge. Here, we report an 80.6% selectivity of gasoline-range C 5–11 hydrocarbons at 86.3% CO conversion over a dual-bed catalyst (CZA + Al 2 O 3 )/N-ZSM-5(97) that consists of an upper-bed syngas-to-dimethyl ether (DME) catalyst (CZA + Al 2 O 3 ) and a lower-bed DME-to-gasoline catalyst (nano-sized N-ZSM-5(97) zeolite). This dual-bed catalyst exhibits an excellent stability in a 110-h reaction test. The iso / n -paraffin ratio in the C 5–11 is up to 18. For the lower-bed zeolite catalyst, the nano-sized structure is beneficial to reduce coke and prolong lifetime; meanwhile, the low acid content is advantageous to increase C 5–11 selectivity. The 2,3-dihydro-1H-inden-1-one species can be definitely detected and identified in the spent lower-bed micro-sized M-ZSM-5(18) catalyst. They are regarded as intermediates to generate polycyclic aromatics, which generally lead to catalyst deactivation. The dual-bed catalyst (CZA + Al 2 O 3 )/N-ZSM-5(97) suggests a promising application in producing gasoline from syngas. • High and selective conversion of syngas to gasoline is achieved by a dual-bed catalyst • The dual-bed catalyst contains upper CZA + Al 2 O 3 and lower N-ZSM-5(97) catalysts • Nano-sized structure of N-ZSM-5(97) is beneficial to reduce coke and prolong lifetime • The low acid content of N-ZSM-5(97) helps to increase gasoline selectivity Because of the gradual depletion and non-renewability of petroleum, the use of non-petroleum resources instead of petroleum is of great significance. This alternative route can be generally achieved through syngas chemistry. The primary transportation fuel gasoline, which contains hydrocarbons with 5–11 carbons and is now almost derived from petroleum, can also be produced from non-petroleum syngas by some methods. However, stably obtaining high gasoline selectivity at high syngas conversion is still challenging. We have achieved this goal by designing a dual-bed catalyst (CZA + Al 2 O 3 )/N-ZSM-5(97) that includes a syngas-to-dimethyl ether (DME) catalyst CZA + Al 2 O 3 in the upper bed and a DME-to-gasoline catalyst N-ZSM-5(97) in the lower bed. This dual-bed catalyst suggests a promising application in producing gasoline from syngas. An 80.6% selectivity of gasoline-range hydrocarbons at 86.3% CO conversion can be achieved over a dual-bed catalyst that consists of a syngas-to-DME catalyst CZA + Al 2 O 3 (a mixture of CuZnAl methanol synthesis catalyst and acidic γ-Al 2 O 3 catalyst) in the upper bed and a DME-to-gasoline catalyst N-ZSM-5(97) (nano-sized H-ZSM-5 zeolite with Si/Al ratio = 97) in the lower bed. The dual-bed catalyst suggests a promising application in producing gasoline from syngas.