Abstract To understand the evolution of coke in the catalytic conversion of biomass-derivates, in-situ diffuse reflectance Fourier transform infrared spectroscopy experiments and ex-situ extraction method were combined to identify the coke species. Considering the ring-shape and unsaturation of furan as an important intermediate from biomass pyrolysis, other simplified biomass-derivates like tetrahydrofuran, butanol, ethylene glycol and methanol was also studied to investigate the effect of its chemical structure on coke formation. The ex-situ study showed that the performance in the induction period and deactivation stage was closely related to the functional group of biomass-derivates. Coke extraction of furan and tetrahydrofuran were of similar composition, which was of doubt. Combined results with in-situ diffuse reflectance Fourier transform infrared spectroscopy revealed that polymethyl benzaldehyde was the main composition of active coke in the catalytic conversion of furan, and then intermediate of benzofuran was detected, and finally alkyl naphthalene and polyaromatic hydrocarbons were formed by polymerization and hydrogen transfer. This study will provide guidelines to enhance hydrocarbon production from the viewpoint of active coke like pre-feeding of polymethyl benzaldehyde.

中文翻译：

---

结合原位 DRIFTS 和非原位方法催化转化生物质衍生物中焦炭的演变：功能结构的影响

摘要 为了解焦炭在生物质衍生物催化转化过程中的演变过程，结合原位漫反射傅里叶变换红外光谱实验和异位提取法对焦炭种类进行鉴定。考虑到呋喃作为生物质热解的重要中间体的环状和不饱和性，还研究了其他简化的生物质衍生物，如四氢呋喃、丁醇、乙二醇和甲醇，以研究其化学结构对焦炭形成的影响。异地研究表明，诱导期和失活期的表现与生物质衍生物的官能团密切相关。呋喃和四氢呋喃的焦炭提取物成分相似，值得怀疑。结合原位漫反射傅里叶变换红外光谱结果表明，聚甲基苯甲醛是呋喃催化转化活性焦的主要成分，然后检测苯并呋喃中间体，最后通过聚合反应生成烷基萘和多环芳烃。氢转移。该研究将从活性焦的角度提供指导，以提高碳氢化合物的产量，如聚甲基苯甲醛的预进料。