铁基碳铝催化剂的制备及其催化玉米秸秆热解制氢研究OA北大核心CSTPCD

An iron-based carbon-aluminum catalyst(Fe/CS-AWA)was prepared using hydrothermal carbonization(HTC)method,using corn stover(CS)biomass as the raw material,activated aluminum ash(AWA)activated by waste aluminum ash(WA)as a carrier and Fe as the active component.The Fe/CS-AWA was applied in catalyzing the pyrolysis of CS for hydrogen production.By investigating the influence of Fe loading on the catalyst performance,the hydrothermal carbonization conditions on the structural properties of Fe/CS-AWA and the effect of catalytic CS pyrolysis on hydrogen production were further optimized using response surface methodology(RSM).The results indicated that compared with CS pyrolysis,AWA and CS mixed hydrothermal carbonization as a catalyst increased the hydrogen production capacity of CS pyrolysis by 19.11 mL/g.More importantly,Fe enhanced the catalytic activity of CS-AWA,with a gas total yield of 160.93 mL/g and hydrogen proportion of 39.96%when the Fe loading was 10%.The optimized process conditions from RSM were as follows:mAWA∶mCS of 2∶1,residence time of 60 min at 250℃,and a carbonization temperature of 500℃.Under these conditions,the gas total yield for Fe/CS-AWAcatalyzing CS pyrolysis was 267.43 mL/g,with a H2 proportion of 37.80%.It was found that characterization revealed the formation of irregular iron carbides and Al—O—C intermediates on the surface of Fe/CS-AWA,enhancing the catalytic activity of Fe/CS-AWA.