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Are ni/and ni5Fe1/biochar catalysts suitable for synthetic natural gas production?A comparison with g-Al2O3 supported catalysts

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Green Energy & Environment 2023年第3期8卷 744-756页

作者： M.Gonzalez-Castano C.Morales J.C.Navarro de Miguel J.H.Boelte O.Klepel J.I.Flege H.Arellano-García Department of Process and Plant Technology Brandenburg University of Technology(BTU)Cottbus-SenftenbergPlatz der Deutschen 1Cottbus03046Germany Applied Physics and Semiconductor Spectroscopy Brandenburg University of Technology Cottbus-SenftenbergKonrad-Zuse-Strasse 1Cottbus03046Germany Department of Inorganic Chemistry Institute of Materials Science of SevilleConsejo Superior de Investigaciones Cientificas(CSIC)Universidad de Sevilla(US)Avenida Americo Vespucio 49Seville41092Spain Institute of Materials Chemistry Brandenburg University of Technology Cottbus–SenftenbergUniversitatsplatz 1SenftenbergD-01968Germany

Among challenges implicit in the transition to the post-fossil fuel energetic model,the finite amount of resources available for the technological implementation of CO_(2) revalorizing processes arises as a central issue.The development of fully renewable catalytic systems with easier metal recovery strategies would promote the viability and sustainability of synthetic natural gas production circular routes.Taking ni and niFe catalysts supported over g-Al_(2)O_(3) oxide as reference materials,this work evaluates the potentiality of ni and niFe supported biochar catalysts for CO_(2) methanation.The development of competitive biochar catalysts was found dependent on the creation of basic sites on the catalyst surface.Displaying lower Turn Over Frequencies than ni/Al catalyst,the absence of basic sites achieved over ni/C catalyst was related to the depleted catalyst performances.For niFe catalysts,analogous ni_(5)Fe_(1) alloys were constituted over both alumina and biochar supports.The highest specific activity of the catalyst series,exhibited by the niFe/C catalyst,was related to the development of surface basic sites along with weaker niFe-C interactions,which resulted in increased ni0:niO surface populations under reaction conditions.In summary,the present work establishes biochar supports as a competitive material to consider within the future low-carbon energetic panorama.

关键词： Biochar catalysts Carbon catalysts ni catalysts niFe alloy Bimetallic catalysts Synthetic natural gas CO_(2)methanation

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Characterization of La-promoted ni/Al_2O_3 catalysts for hydrogen production from glycerol dry reforming

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Journal of Energy Chemistry 2014年第1期23卷 15-21页

作者： Kah Weng Siew Hua Chyn Lee Jolius Gimbun Chin Kui Cheng Centre of Excellence for Advanced Research in Fluid Flow Universiti Malaysia PahangLebuhraya Tun Razak26300 GambangKuantan PahangMalaysia Faculty of Chemical & Natural Resources Engineering Universiti Malaysia PahangLebuhraya Tun Razak26300 GambangKuantan PahangMalaysia

In the current paper, dry(CO2)-reforming of glycerol, a new reforming route, was carried out over alumina(Al2O3)-supported, non-promoted and lanthanum-promoted nickel(ni) catalysts. Both sets of catalysts were synthesized via a wet co-impregnation procedure. Physicochemical characterization of the catalysts showed that the promoted catalyst possessed smaller metal crystallite size, hence higher metal dispersion compared to the virgin ni/Al2O3catalyst. This was also corroborated by the surface images captured by the FESEM analysis. From temperature-programmed calcination analysis, the derivative weight profiles revealed two peaks, which represent a water elimination peak at a temperature range of 373 to 473 K followed by nickel nitrate decomposition from 473 to 573 K. In addition, BET surface area measurements gave 85.0 m2 g-1for the non-promoted ni catalyst, whilst the promoted catalysts showed an average of 1% to 6% improvement depending on the La loadings. Significantly, reaction studies at 873 K showed that glycerol dry reforming successfully produced H2. The 2%La-ni/Al2O3catalyst, which possessed the largest BET surface area, gave an optimum H2generation(9.70%) at a glycerol conversion of 24.5%.

关键词： ni catalysts dry reforming lanthanide promotion reaction kinetics

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Hydrogen production through diesel steam reforming over rare-earth promoted ni/γ-Al_2O_3 catalysts

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Journal of Natural Gas Chemistry 2011年第3期20卷 287-293页

作者： Lihao Xu Wanliang Mi Qingquan Su Department of Thermal Science ＆ Energy Engineering School of Mechanical Engineering University of Science and Technology Beijing Beijing 100083 China

Rare-earth （La, Ce, Yb） promoted ni/γ-Al2O3 catalysts were prepared by impregnation method. Activity and carbon formation resistance of the prepared catalysts were evaluated under various reaction conditions. Catalyst characterizations with TG, TPR and H2 chemisorption were carried out to investigate the promoting mechanism. Experimental results show that rare-earth promoters, especially Yb promoter, obviously improve the activity and carbon formation resistance of ni/γ-Al2O3 catalyst, and Yb-ni catalyst shows even higher performance than several commercial catalysts. According to the characterization results, Yb promoter enhances the interaction between the active metal and support, thus increasing the active metal＇s dispersion and improving its performance. Furthermore, the obvious difference in diesel conversion between Yb-ni catalyst and others was shown in the temperature range of 450-550 °C, which would be the reason for its excellent carbon resistance.

关键词： diesel steam reforming ni catalysts rare-earth promoter fuel cell

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Role of Sn in ni-Sn/CeO2 catalysts for Ethanol Steam Reforming

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Chinese Journal of Chemistry 2017年第5期35卷 651-658页

作者： Hao Tian Xinyu Li Sai Chen Liang Zeng Jinlong Gong Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin University Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China

Reducible oxides （e.g.,CeO2 and ZrO2） supported 3d transition metals （e.g.,ni,Co,Pt） exhibit remarkable catalytic activity in reactions that involve water activation,such as steam reforming and water gas shift.This paper describes the influence of Sn addition on the performance of ni/CeO2 catalysts in ethanol steam reforming.0.25 wt% Sn addition improved the stability of ni/CeO2 by forming ni-Sn bimetallic nanoparticles with Sn enriched surfaces to suppress the carbon deposition.ni0.25Sn/CeO2 kept over 90% ethanol conversion in a 20 h stability test at 600 ℃ with over 60% hydrogen selectivity under a gas hourly space velocity of 57000 mL/（g·h）.However,the presence of Sn decreased the overall oxygen storage capacity and oxygen mobility of niSn/CeO2,which hampered water activation process and coke elimination occurring at the interface between ni and CeO2.Additionally,ethanol decomposition was also suppressed due to the coverage of Sn atoms on ni surfaces.

关键词： supported catalysts ethanol steam reforming ni catalysts metal-support interaction hydrogen energy

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Engineering morphologies of yttrium oxide supported nickel catalysts for hydrogen production

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Rare Metals 2023年第1期42卷 176-188页

作者： Rong-Bin Zhang Zi-Ao Tu Shuai Meng Gang Feng Zhang-Hui Lu Ying-Zhi Yu Tomas Ramirez Reina Fei-Yang Hu Xiao-Han Chen Run-Ping Ye Key Laboratory of Jiangxi Province for Environment and Energy Catalysis Institute of Applied ChemistrySchool of Chemistry and Chemical EngineeringNanchang UniversityNanchang330031China Chemistry Examination Department Patent OfficeChina National Intellectual Property AdministrationBeijing100088China College of Chemistry and Chemical Engineering Jiangxi Normal UniversityNanchang330022China Department of Chemical and Process Engineering University of SurreyGuildfordGU27XHUK Department of Inorganic Chemistry and Materials Sciences Institute University of Seville-CSICSeville41092Spain

The catalytic performance is highly related to the catalyst structure.Herein,a series of ni nanoparticles supported on Y_(2)O_(3) with different morphologies were successfully synthesized via hydrothermal process screening different pH environments.These ni/Y_(2)O_(3)catalysts were applied to efficiently produce CO_(x)-free H2through ammonia decomposition.We identify a significant impact of Y_(2)O_(3)supports on nickel nanoclusters sizes and dispersion.The experimental results show that ni/Y11 catalyst achieves 100% ammonia decomposition conversion under a gas hour space velocity(GHSV) of 12,000 ml·h^(-1)·gcat^(-1) and temperature of 650℃.Such a high level of activity over ni/Y11 catalyst was attributed to a large specific surface area,appropriate alkalinity,and small ni nanoparticles diameter with high dispersion.

关键词： Ammonia decomposition Hydrogen production Yttrium oxide morphology ni catalysts Hydrothermal method

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Engineering the Interface and Interaction Structure on Highly Coke-Resistant ni/CeO_(2)-Al_(2)O_(3) Catalyst for Dry Reforming of Methane

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Chinese Journal of Structural Chemistry 2022年第12期41卷 7-14页

作者： Sha Li Xin Wang Min Cao Jingjun Lu Li Qiu Xiaoliang Yan College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuanShanxi 030024China State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuanShanxi 030024China

Designing and tailoring metal-support interaction in ni-based catalysts with plentiful interfacial sites is of significant interest for achieving a targeted catalytic performance in dry reforming of methane (DRM),but remains as a challenging task.In this work,ni/Al_(2)O_(3)and ni/CeO_(2)-Al_(2)O_(3)catalysts with the same strong metal-support interaction(SMSI) but distinct interface structure are developed by an improved evaporation-induced self-assembly method using pseudobohemite gel as aluminum source.ni/CeO_(2)-Al_(2)O_(3)exhibits superior catalytic activity and stability in DRM in comparison with ni/Al_(2)O_(3).The highest CH4and CO_(2)conversion reaches at 71.4%and 82.1%for ni/CeO_(2)-Al_(2)O_(3),which are higher than that of 64.3% and 75.6% for ni/Al_(2)O_(3)at 700℃.The SMSI effect in ni/CeO_(2)-Al_(2)O_(3)provides more active interfacial sites with less coke deposition,and promotes the generation of active formate species which are the key intermediates for DRM.The findings of the present work could possibly pave the way for fabricating catalysts with SMSI strategy for efficient heterogeneous catalysis.

关键词： metal-support interaction interface ni catalysts CeO_(2) dry reforming of methane

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Catalytic transfer hydrogenolysis of C–O bonds in lignin model compounds without arene hydrogenation

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Green Chemical Engineering 2022年第1期3卷 25-33页

作者： Kai Cui Xiuge Zhao Qingpo Peng Honghui Gong Xinjia Wei Jiajia Wang Manyu Chen Zhenshan Hou Key Laboratory for Advanced Materials Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai200237China

The shortage of resources and the destruction of the environment have caused serious resource and environmental problems shared by all countries around the world. As a ubiquitous renewable resource, biomass has great prospects for replacing fossil energy and attracted attention from the society. The use of catalytic approach to transform biomass into high-value chemicals is an effective way to use biomass efficiently. In this work, nisupported catalysts has been developed for the selective cleavage of C–O bonds in lignin model compounds with 2-propanol as the hydrogen source solvent. Among these catalysts, it was indicated that zirconium phosphate(Zr P)-supported ni catalysts were highly efficient and recyclable for alkyl-aryl ether(α-O-4 and β-O-4) cleavage in lignin model compounds. The further investigation demonstrated that the transfer hydrogenolysis of the C–O bond is highly selective, which afforded phenols and aromatics as dominant products without the products arising from hydrogenation of aromatic rings. Through a series of characterization of the catalyst, it was demonstrated that the medium strong acid sites of the Zr P support promoted the cleavage of alkyl-aryl ethers(α-O-4 and β-O-4),and Br?nsted acid sites favored for achieving high selectivity toward C–O bond cleavage. Additionally, ni(0) sites on the Zr P catalysts were responsible for the catalytic transfer hydrogenolysis.

关键词： C–O bond cleavage Hydrogenolysis Zirconium phosphate Biomass conversion ni catalysts

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Effects of CO_2 content on the activity and stability of nickel catalyst supported on mesoporous nanocrystalline zirconia

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Journal of Natural Gas Chemistry 2008年第3期17卷 278-282页

作者： M. Rezaei S.M. Alavi S. Sahebdelfar Zi-Feng Yan Chemical Engineering Department Faculty of Engineering University of Kashan Iran Chemical Engineering Department lran University of Science and Technology Tehran Iran Petrochemical Research ＆ Technology Company （NPC-RT） Tehran Iran State Key Laboratory for Heavy Oil Processing Key Laboratory of Catalysis CNPC China University of Petroleum Dongying 257061 Shandong China

The effects of carbon dioxide content on the catalytic performance and coke formation of nickel catalyst supported on mesoporous nanocrystalline zirconia with high surface area and pure tetragonal crystalline phase were investigated in methane reforming with carbon dioxide. The samples were characterized by XRD, BET, TPR, TPO, TPH, TEM, and SEM techniques. The catalyst prepared showed high surface area and a mesoporous structure with a narrow pore size distribution. The obtained results revealed that the increase in CO2 content increased the methane conversion and stability of the catalyst and significantly reduced the coke deposition. The TPH analysis showed that several species of carbon with different reactivities toward hydrogenation were deposited on the spent catalysts employed under different CO2 contents.

关键词： ni catalysts carbon dioxide reforming coke deposition

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Controllable synthesis of ni-catalyzed tetragonal tungsten nanowires via chemical vapor deposition

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Progress in Natural Science:Materials International 2012年第5期22卷 514-519页

作者： Chao Wang a,Yuehui He a,Chaoqun Peng b,Shiliang Wang a,c,Xinli Liu a a State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China b School of Material Science and Engineering,Central South University,Changsha 410083,China c School of Physics Science and Technology,Central South University,Changsha 410083,China State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 China School of Material Science and Engineering Central South University Changsha 410083 China School of Physics Science and Technology Central South University Changsha 410083 China

Tetragonal single-crystal tungsten nanowires were successfully synthesized by chemical vapor deposition(CVD) catalyzed by ni particles.The influences of the catalysts,temperature and growth time on the formation of the nanowires were investigated.It was found that the tetragonal tungsten nanowires(WNWs) arrays were obtained by deterministic growth from the ordered ni catalyst particles with one-to-one relation in size and position between the catalysts and nanowires.The large-scale tungsten nanowire arrays were synthesized at the low temperature of 950℃.Samples were characterized by X-ray diffraction(XRD),field-emission scanning electron microscopy(FE-SEM),transmission electron microscopy(TEM) and high-resolution transmission electron microscopy(HRTEM).Increasing growth time at 950℃,the tip of the WNWs changed from four(211) planes to four(110) planes.Good controls of the orientation and structure of WNWs arrays were important for adjusting their properties to satisfy different requirements of potential nanodevices.

关键词： Tungsten nanowires ni catalysts Chemical vapor deposition Nanostructures

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