Catalytic pyrolysis of biomass to aromatics over bifunctional Ni/ZSM-5 catalysts assembled on rice husk-derived silica platform
Chem Catalysis(2024)
摘要
Biomass resources can be converted to biochemicals via the catalytic pyrolysis process, but conventional catalysts often suffer from severe deactivation due to coke formation. Here, a ternary Ni/bio-Z5 catalyst was constructed by integrating ZSM-5 and Ni components on a porous bio-SiO2 platform derived from rice husk. The Ni/bio-Z5 achieved 76% aromatic selectivity for the catalytic pyrolysis of soybean oil, corresponding to a space-time yield as high as 154.8 garom · h−1 · gcata−1. It is confirmed that the bio-SiO2 platform shortened the surface diffusion path of aromatics by co-diffusion, which then inhibited coke formation and significantly improved the catalyst stability. Moreover, the atomically dispersed Ni on ZSM-5 effectively promotes the aromatization of C2=-C6= by enhancing adsorption and acting as an oligomerization center for isoalkyl carbenium ions. The coupling of deoxygenation and aromatization reactions promotes the enhancement of aromatic selectivity through the formation of methyl-substituted cyclopentenone that can be readily converted to aromatics.
更多查看译文
关键词
aromatics,catalytic pyrolysis,biomass,zeolite,catalyst stability,oils,fatty acids
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要