Ni/γ-Al_(2)O_(3)催化富氢生物质热解气蒸汽重整制氢实验研究  

Experimental study of hydrogen production via the steam reforming of hydrogen-rich biomass pyrolysis gas under the catalysis of Ni/γ-Al_(2)O_(3)

作　　者：王体朋[1] 胡锶菡 刘吉[1,2] 胡斌 孙怀得[1] 张镇西 陆强 WANG Ti-peng;HU Si-han;LIU Ji;HU Bin;SUN Huai-de;ZHANG Zhen-xi;LU Qiang(National Engineering Research Center of New Energy Power Generation,North China Electric Power University,Beijing,102206,China;Suzhou Institute of North China Electric Power University,Suzhou 215123,China)

机构地区：[1]华北电力大学新能源发电国家工程研究中心,北京102206 [2]华北电力大学苏州研究院,江苏苏州215123

出　　处：《燃料化学学报（中英文）》2023年第11期1691-1700,共10页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(52006069,31971793,52276189);江苏省自然科学基金(BK20221248)资助。

摘　　要：本实验对比研究了富氢生物质热解气和甲烷(CH_(4))蒸汽重整,探讨了富氢生物质热解气组分对CH_(4)等低烃重整反应的影响机理,并揭示了Ni/γ-Al_(2)O_(3)催化剂在富氢热解气蒸汽重整反应中的作用机制。H_(2)通过提供还原气氛使得催化剂表面高活性Ni~0维持动态平衡,从而提高其催化活性;同时,生物质热解气对过渡碳向石墨碳的转化产生抑制作用,降低了积炭对Ni/γ-Al_(2)O_(3)催化活性的影响。其次,考察了反应温度、水碳比(S/C)、空速等操作条件对富氢热解气蒸汽重整反应的影响规律。反应温度和S/C的提高有效促进了CH_(4)蒸汽重整反应,同时抑制了积炭的产生;随着反应空速的提高,CH_(4)蒸汽重整反应的竞争性减弱,水煤气变换反应、CH_(4)干重整反应的竞争性逐渐增加,使得CH_(4)转化受到抑制。本实验为生物质热解气蒸汽重整反应机理研究及高效催化剂开发奠定了基础。In this paper,the steam reforming reactions of the hydrogen-rich biomass pyrolysis gas and methane(CH_(4))were compared.The influence mechanism of hydrogen-rich biomass pyrolysis gas components on the reforming reaction of CH_(4) and other low hydrocarbons was discussed,and the catalytic effect of Ni/γ-Al_(2)O_(3) catalyst was revealed.H2 could provide a reductive atmosphere to maintain the dynamic balance of the highly active Ni0 on the catalyst surface,so as to improve its catalytic activity.At the same time,biomass pyrolysis gas could inhibit the conversion of transition carbon to graphitic carbon,reducing the influence of carbon deposition on the catalytic activity of Ni/γ-Al_(2)O_(3).In addition,the influence of operating conditions such as reaction temperature,the ratio of steam and carbon(S/C),as well as space velocity on the steam reforming reaction of hydrogen-rich pyrolysis gas was investigated.The increase of reaction temperature and S/C ratio effectively promoted the steam reforming of CH_(4) and inhibited the production of carbon deposition.With the increase of space velocity,the competitiveness of CH_(4) steam reforming reaction was weakened,whereas that of water gas shift reaction and CH_(4) dry reforming was increased.Hence,the transformation of CH_(4) was inhibited.This paper cound lay a foundation for the research on the mechanism of biomass pyrolysis gas steam reforming reaction and the development of high-efficiency catalysts.

关 键 词：生物质热解气 蒸汽重整 Ni/γ-Al_(2)O_(3) 氢气 

分 类 号：TQ203.2[化学工程—有机化工]