Improvement of catalytic stability for CO2 reforming of methane by copper promoted Ni-based catalyst derived from layered-double hydroxides

Bing Li; Zhenxin Xu; Fangli Jing; Shizhong Luo; Ning Wang; Wei Chu

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Improvement of catalytic stability for CO2 reforming of methane by copper promoted Ni-based catalyst derived from layered-double hydroxides

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cqvip:Copper-promoted nickel-based metal nanoparticles(NPs) with high dispersion and good thermal stability were derived from layered-double hydroxides(LDHs) precursors that were facilely developed by a coprecipitation strategy.The copper-promoted Ni-based metal NPs catalysts were investigated for methane reforming with carbon dioxide to hydrogen and syngas.A series of characterization techniques including XRD,N_2 adsorption and desorption,H_2-TPR,XPS,CO_2-TPD,TEM,TGA and in situ CH_4-TPSR were utilized to determine the structure-function relationship for the obtained catalysts.The copper addition accelerated the catalyst reducibility as well as the methane activation,and made the Ni species form smaller NPs during both preparation and reaction by restricting the aggregation.However,with higher copper loading,the derived catalysts were less active during methane reforming with CO_2 to syngas.It was confirmed that the catalyst with 1 wt%Cu additive gave the higher catalytic activity and remained stable during long time reaction with excellent resistance to coking and to sintering.Furthermore,the mean size of metal NPs changed minimally from 6.6 to 7.9 nm even after 80 h of time on stream at temperature as high as700℃ for this optimized catalyst.Therefore,this high dispersed anti-coking copper-promoted nickel catalyst derived from LDHs precursor could be prospective catalyst candidate for the efficient heterogeneous catalysis of sustainable CO_2 conversion.

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《能源化学：英文版》 |2016年第6期|P.1078-1085|共8页
作者
Bing Li; Zhenxin Xu; Fangli Jing; Shizhong Luo; Ning Wang; Wei Chu;
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Department of Chemical Engineering Sichuan University;

Institut de Chimie et Procedes pour l’Energie l’Environnement et la Sante (ICPEES) UMR 7515 CNRS Universite de Strasbourg (UdS);

Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University;

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Improvement of catalytic stability for CO2 reforming of methane by copper promoted Ni-based catalyst derived from layered-double hydroxides

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