首页|Steam reforming of acetic acid over Ni/biochar of low metal-loading:Involvement of biochar in tailoring reaction intermediates renders superior catalytic performance

Steam reforming of acetic acid over Ni/biochar of low metal-loading:Involvement of biochar in tailoring reaction intermediates renders superior catalytic performance

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Biochar is a reactive carrier as it may be partially gasified with steam in steam reforming,which could influence the formation of reaction intermediates and modify catalytic behaviors.Herein,the Ni/biochar as well as two comparative catalysts,Ni/Al2O3 and Ni/SiO2,with low nickel loading(2％(mass))was conducted to probe involvement of the varied carriers in the steam reforming.The results indicated that the Ni/biochar performed excellent catalytic activity than Ni/SiO2 and Ni/Al2O3,as the biochar carrier facilitated quick conversion of the-OH from dissociation of steam to gasify the oxygen-rich carbona-ceous intermediates like C=O and C-O-C,resulting in low coverage while high exposure of nickel species for maintaining the superior catalytic performance.In converse,strong adsorption of aliphatic intermediates over Ni/Al2O3 and Ni/SiO2 induced serious coking with polymeric coke as the main type(21.5％and 32.1％,respectively),which was significantly higher than that over Ni/biochar(3.9％).The coke over Ni/biochar was mainly aromatic or catalytic type with nanotube morphology and high crystallinity.The high resistivity of Ni/biochar towards coking was due to the balance between formation of coke and gasification of coke and partially biochar with steam,which created developed mesopores in spent Ni/biochar while the coke blocked pores in Ni/Al2O3 and Ni/SiO2 catalysts.

Steam reformingAcetic acidNi/biochar catalystProperty of cokeReaction intermediates

Yunyu Guo、Yiran Wang、Shu Zhang、Yi Wang、Song Hu、Jun Xiang、Walid Nabgan、Xun Hu

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School of Material Science and Engineering,University of Jinan,Jinan 250022,China

Joint International Research Laboratory of Biomass Energy and Materials,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China

State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China

Departament d'Enginyeria Química,Universitat Rovira i Virgili,Tarragona 43007,Spain

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National Natural Science Foundation of ChinaProgram for Taishan Scholars of Shandong Province GovernmentAgricultural Innovation Program of Shandong ProvinceResearch and Development program of Shandong Basan Graphite New Material PlantNational Natural Science Foundation of ChinaKey projects for intergovernmental cooperation in international science,technology and innovation

51876080SD2019NJ015520760972018YFE0127500

2024

10.1016/j.cjche.2023.07.014

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子：0.818
ISSN：1004-9541
年,卷(期)：2024.68(4)
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