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Engineering oxygen vacancies on Tb-doped ceria supported Pt catalyst for hydrogen production through steam reforming of long-chain hydrocarbon fuels

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Chinese Journal of Chemical Engineering 2024年第4期68卷 181-192页

作者： Zhourong Xiao Changxuan Zhang Peng Li Desong Wang Xiangwen Zhang Li Wang Jijun Zou Guozhu Li State Key Laboratory of Metastable Materials Science and Technology(MMST) Hebei Key Laboratory of Applied ChemistryCollege of Environmental and Chemical EngineeringYanshan UniversityQinhuangdao 066004China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China

steam reforming of long-chain hydrocarbon fuels for hydrogen production has received great attention for thermal management of the hypersonic vehicle and fuel-cell *** this work,Pt catalysts supported on CeO_(2)and Tb-doped CeO_(2)were prepared by a precipitation *** physical structure and chemical properties of the as-prepared catalysts were characterized by powder X-ray diffraction,scanning electron microscopy,transmission electron microscopy,Raman spectroscopy,H_(2)temperature programmed reduction,and X-ray photoelectron *** results show that Tb-doped CeO_(2)supported Pt possesses abundant surface oxygen vacancies,good inhibition of ceria sintering,and strong metal-support interaction compared with CeO_(2)supported *** catalytic performance of hydrogen production via steam reforming of long-chain hydrocarbon fuels(n-dodecane)was *** with 2Pt/CeO_(2),2Pt/Ce_(0.9)Tb_(0.1)O_(2),and 2Pt/Ce_(0.5)Tb_(0.5)O_(2),the 2Pt/Ce_(0.7)Tb_(0.3)O_(2)has higher activity and stability for hydrogen production,on which the conversion of n-dodecane was maintained at about 53.2%after 600 min reaction under 700℃at liquid space velocity of 9 ml·g^(-1)·h^(-1).2Pt/CeO_(2)rapidly deactivated,the conversion of n-dodecane was reduced to only 41.6%after 600 min.

关键词： steam reforming n-Dodecane Hydrogen production Pt-based catalyst Oxygen vacancy CeO_(2)

NiO-Ce_(0.5)Zr_(0.5)O_2 catalysts prepared by citric acid method for steam reforming of ethanol

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Journal of Rare Earths 2008年第6期26卷 831-835页

作者：叶季蕾王阳刘源 Department of Catalysis Sciences and Technology School of Chemical Engineering Tianjin University

NiO-Ce0.5Zr0.5O2 catalysts were prepared by citrate method and used for hydrogen production from steam reforming of ethanol （SRE）. The effect of nickel content and space velocity on the catalytic performance was investigated. The prepared catalysts were characterized with XRD and thermal analysis techniques. 20%NiO-Ce0.5Zr0.5O2catalyst was very active and selective for hydrogen production via SRE, in which ethanol conversion of 100% could be obtained with feed component of 20% （H2O＋EtOH） and 80% N2, water/ethanol of 3/1 in molar ratio at 350 ℃. Also, the catalyst showed good stability for anti-sintering and carbon-resistance. The XRD illuminated that both NiO and Ce0.5Zr0.5O2 crystal sizes were very small in NiO-Ce0.5Zr0.5O2 catalyst, and Ce0.5Zr0.5O2 solid solution was formed.

关键词： nickel CeO2 ZrO2 steam reforming ethanol hydrogen rare earths

Catalytic steam reforming of biomass over Ni-based catalysts: Conversion from poplar leaves to hydrogen-rich syngas

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Journal of Natural Gas Chemistry 2011年第4期20卷 377-383页

作者： Lingyan Cao Zhigang Jia Shengfu Ji Jinyong Hu State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China

A series of Ni/SBA-15 catalysts with Ni contents from 5 wt%–20 wt%and CaO-12.5%Ni/SBA-15 catalysts with CaO contents from 1.4 wt%– 9.8 wt%have been *** structure of the catalysts was characterized using X-ray diffraction（XRD）,N2 adsorption-desorption,transmission electron microscopy（TEM）and X-ray photoelectron spectroscopy（XPS）.The performance of catalytic steam reforming of the poplar leaves to the hydrogen-rich syngas was tested in a fixed-bed *** results indicate that the 7.0wt%CaO-12.5wt%Ni/SBA-15 catalyst exhibits the best performance for the catalytic steam reforming of poplar leaves to hydrogen-rich *** ratio of H2：CO can reach ca 5：1 in the hydrogen-rich *** yield of H2 can reach 273.30 mL/g（poplar leaves）.In the CaO-Ni/SBA-15 catalyst,Ni active component mainly fills the role of catalytic steam reforming of the poplar leaves,and CaO active component mainly plays the role as water-gas shift and CO2 sorbent.

关键词： biomass steam reforming hydrogen-rich syngas Ni-basic catalyst CaO

Hydrogen production from steam reforming of biomass-derived levulinic acid over highly stable spinel-supported Ni catalysts

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Waste Disposal and Sustainable Energy 2023年第4期5卷 427-438页

作者： Tian Li Hongcai Su Lingjun Zhu Dan Xu Na Ji Shurong Wang State Key Laboratory of Clean Energy Utilization Zhejiang UniversityZheda Road 38Hangzhou310027China School of Environmental Science and Engineering Tianjin Key Laboratory of Biomass/Wastes UtilizationTianjin UniversityTianjin300350China

As one of the main oxygen-containing organic products generated from the hydrothermal conversion of biomass,levulinic acid(LA)has the potential to be further *** work investigated the steam reforming(SR)process of biomass-derived LA to produce H_(2).A series of Ni catalysts supported by various spinels were synthesized via co-precipitation and *** Ni active metal dispersed well on the NiAl_(2)O_(4)catalyst with high specific surface area,thereby exhibiting high catalytic *** all the catalysts tested,15Ni/NiAl_(2)O_(4)showed the best performance for SR of LA,resulting in high carbon conversion of 96.3%,H_(2)yield of 92.8%,and H_(2)concentration of 67.9%at a reaction temperature of 800℃.Additionally,the influences of reaction temperature,steam-to-carbon ratio(S/C),and liquid hourly space velocity(LHSV)were also ***,during the 40-h continuous SR process of LA,the 15Ni/NiAl_(2)O_(4)catalyst maintained its outstanding catalytic *** study provides an encouraging route for upgrading biomass-derived LA into eco-friendly and high-value fuels,thereby advancing the sustainability of the biomass refining process.

关键词： Biomass Levulinic acid Hydrogen Spinel-supported Ni catalysts steam reforming

Hydrogen production by steam reforming of acetic acid and bio-oil using Ni/γ-Al2O3 catalysts

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International Journal of Agricultural and Biological Engineering 2015年第6期8卷 69-76页

作者： Li Yanmei Fu Peng Yi Weiming Bai Xueyuan School of Agricultural and Food Engineering Shandong University of TechnologyZiboShandong 255049China Shandong Research Center of Engineering and Technology for Clean Energy ZiboShandong 255049China

Hydrogen production from steam reforming of bio-oil and acetic acid using Ni/γ-Al2O3 catalyst was studied in a laboratory-scale fixed bed *** study selected different Ni loadings(16.8%and 30.5%)in Ni/γ-Al2O3 catalysts and reaction temperatures(500°C,600°C and 700°C)as variables to optimize the hydrogen yield and selectivity of gases *** were carried out in an isothermal *** catalysts were prepared on wet impregnation of aγ-Al2O3 which supported with two different Ni *** principal gases generated were H2,CO,CO2 and *** results from steam reforming of acetic acid showed that the yield and selectivity of hydrogen using the catalyst with 30.5%Ni were significantly higher than that with 16.8%*** results showed that the most favorable temperature for hydrogen production was 600°C,and the steam reforming of bio-oil using Ni/γ-Al2O3 catalyst with 30.5%Ni showed that the yields and selectivity of H2 and CO2 increased with the temperature increasing while CH4 and CO selectivity *** results showed that the most favorable temperature for hydrogen production from bio-oil using 30.5%Ni/γ-Al2O3 was 600°C,at which hydrogen yield was at its maximum of 65%.

关键词： hydrogen bio-oil Ni/γ-Al2O3 catalyst steam reforming acetic acid

Numerical analysis and experimental study of hydrogen production from dimethyl ether steam reforming

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Science China Chemistry 2012年第9期55卷 1982-1987页

作者： LI Cong WANG YanSong FAN PingQing College of Automobile Engineering Shanghai University of Engineering ScienceShanghai 201620China

An experimental and theoretical study of steam reforming of dimethyl ether was carried out in a processor for fuel cell vehicles to explore the effect of temperature gradient and hydrogen content of the processor.A steady-state,laminar,two-dimensional axi-symmetric model was proposed to investigate the fluid flow,heat transfer and chemical reactions in the dimethyl ether steam reforming processor using porous medium *** numerical model was established with Star-CD program using SIMPLE algorithm and finite volume *** verification of the two-dimensional mathematical model was *** numerical results coincided well with the experimental *** effects of the parameters on the temperature gradient and hydrogen content of the processor were studied using the numerical model.

关键词： hydrogen steam reforming simulation

Kinetic model on coke oven gas with steam reforming

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Journal of Central South University of Technology 2008年第1期15卷 127-131页

作者：张家元周孑民闫红杰 School of Energy Science and Engineering Central South University

The effects of factors such as the molar ratio of H2O to CH4 (n(H2O)/n(CH4)), methane conversion temperature and time on methane conversion rate were investigated to build kinetic model for reforming of coke-oven gas with steam. The results of experiments show that the optimal conditions for methane conversion are that the molar ratio of H2O to CH4 varies from 1.1 to 1.3 and the conversion temperature varies from 1 223 to 1 273 K. The methane conversion rate is more than 95% when the molar ratio of H2O to CH4 is 1.2, the conversion temperature is above 1 223 K and the conversion time is longer than 0.75 s. Kinetic model of methane conversion was proposed. All results demonstrate that the calculated values by the kinetic model accord with the experimental data well, and the error is less than 1.5%.

关键词： coke oven gas steam reforming kinetic model conversion rate

steam reforming of Dimethyl Ether by Gliding Arc Gas Discharge Plasma for Hydrogen Production

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Chinese Journal of Chemical Engineering 2014年第1期22卷 104-112页

作者：王保伟孙启梅吕一军杨美琳闫文娟 Key Laboratory for Green Chemical Technology School of Chemical Engineering TechnologyTianjin University

Gliding arc gas discharge plasma was used for the generation of hydrogen from steam reforming of dimethyl ether(DME).A systemic procedure was employed to determine the suitable experimental *** was found that DME conversion first increased up to the maximum and then decreased slightly with the increase of added water and *** increase of total feed gas flow rate resulted in the decrease of DME conversion and hydrogen yield,but hydrogen energy consumption dropped down to the lowest as total feed gas flow rate increased to76 ml·min *** electrode gap and higher discharge voltage were *** shape had an important effect on the conversion of DME and production of *** the five electrodes,electrode 2#with valid length of 55 mm and the radian of 34 degrees of the top electrode section was the best option,which enhanced obviously the conversion of DME.

关键词： dimethyl ether steam reforming hydrogen production gliding arc gas discharge

steam reforming of Dimethyl Ether over Coupled Catalysts of CuO-ZnO-Al2Oa-ZrO2 and Solid-acid Catalyst

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Chinese Journal of Chemical Engineering 2009年第1期17卷 64-71页

作者：冯冬梅左宜赞王德峥王金福 Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University Beijing 100084 China

steam reforming （SR） of dimethyl ether （DME） was investigated for the production of hydrogen for fuel cells. The activity of a series of solid acids for DME hydrolysis was investigated. The solid acid catalysts were ZSM-5 [Si/A] = 25, 38 and 50： denoted Z（Si/Al）] and acidic alumina （γ-Al2O3） with an acid strength order that was Z（25）〉Z（38）〉Z（50）〉γ-Al2O3. Stronger acidity gave higher DME hydrolysis conversion. Physical mixtures containing a CuO-ZnO-Al2O3-ZrO2 catalyst and solid acid catalyst to couple DME hydrolysis and methanol SR were used to examine the acidity effects on DME SR. DME SR activity strongly depended on the activity for DME hydrolysis. Z（25） was the best solid acid catalyst for DME, SR and gave a DME conversion〉90% IT= 240℃,n（H20）/n（DME） = 3.5, space velocity = 1179 ml.（g cat）^-1.h^-1, and P= 0.1MPa]. The influences of the reaction temperature, space velocity and feed molar ratio were studied. Hydrogen production significantly depended on temperature and space velocity. A bifunctional catalyst of CuO-ZnO-Al2O3-ZrO2 catalyst and ZSM-5 gave a high H2 production rate and CO2 selectivity.

关键词： hydrogen production dimethyl ether steam reforming hydrolysis solid-acid catalyst CuO-ZnO catalyst