摘要
Excess crude glycerol derived as a by-product from biodiesel industry prompts the need to valorise glycerol to value-added chemicals.In this context,catalytic steam reforming of glycerol(SRG) was proposed as a promising and sustainable alternative for producing renewable hydrogen(H2).Herein,the development of nickel(Ni) supported on ceria-modified mesoporous γ-alumina(γ-Al2 O3) catalysts and their applications in catalytic SRG(at550-750℃ atmospheric pressure and weight hourly space velocity,WHSV,of 44,122 ml·g^-1·h^-1(STP)) is presented.Properties of the developed catalysts were characterised using many technique s.The findings show that ceria modification improved Ni dispersion on γ-Al2 O3 catalyst support with highly active small Ni particles,which led to a remarkable catalytic performance with the total glycerol conversion(ca.99%),glycerol conversion into gaseous products(ca.77%) and H2 yield(ca.62%).The formation rate for H2 production(14.4 ×10^(-5)mol·s^-1·g^-1, TOF(H2)=3412 s^-1) was significantly improved with the Ni@12 Ce-Al2 O3 catalyst,representing nearly a 2-fold increase compared with that of the conventional Ni@AI2 O3 catalyst.In addition,the developed catalyst also exhibited comparatively high stability(for 12 h) and coke resistance ability.
基金
funding from European Union's Horizon 2020 research and innovation programme under grant agreement No.872102
financial support by the Petroleum Technology Development Fund(PTDF),Nigeria(PTDF/ED/OSS/PHD/IA/1209/17)
financial support from the European Commission Marie Sklodowska-Curie Individual Fellowship(H2020-MSCAIF-NTPleasure-748196)
the Chinese Scholarship Council(CSC)for her academic visiting fellowship at the University of Manchester(No.201708440477)
the Foundation of Department of Education of Guangdong Province(Nos.2017KZDXM085,2018KZDXM070)。
