文献类型：期刊文献

中文题名：Optimum Operating and Regeneration Parameters of ZnI2 Catalyst for Converting Methanol to Triptane:An Ideal Component of Unleaded Aviation Gasoline

英文题名：Optimum Operating and Regeneration Parameters of ZnI2 Catalyst for Converting Methanol to Triptane: An Ideal Component of Unleaded Aviation Gasoline

作者：Chen Weiwei[1];Song Yueqin[1];Zong Rui[1];Du Changfei[2];Zhou Xiaolong[1];Li Chenglie[1]

机构：[1]East China Univ Sci & Technol, Dept Petr Proc, Shanghai 200237, Peoples R China;[2]Beijing Aviat Oil Tech Developing Ctr, Beijing 100076, Peoples R China

年份：2018

卷号：20

期号：2

起止页码：56

中文期刊名：China Petroleum Processing & Petrochemical Technology

外文期刊名：CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY

收录：;Scopus;WOS:【SCI-EXPANDED(收录号:WOS:000438677900011)】；

语种：英文

中文关键词：triptane; zinc iodide;methanol;catalyst;regeneration;deactivation

外文关键词：triptane; zinc iodide; methanol; catalyst; regeneration; deactivation

摘要：Conversion of methanol(MeOH) to 2,2,3-trimethylbutane(triptane) over zinc iodide(ZnI_2)catalyst was investigated in a closed batch reactor.Optimum operating parameters were searched and catalyst deactivation and regeneration behaviors were discussed.The fresh,spent and regenerated catalysts were characterized by XRD,TG and XRF measurements to elucidate the related mechanism.The experimental results showed that the triptane yield reached up to 12.2% under the process conditions,including a reaction temperature of 200℃,an initial pressure of 0.35 MPa,a reaction time of 2 h,and a Me OH to ZnI_2 molar ratio of 2.The catalyst was gradually deactivated after several run cycles.A small amount of iodine was lost and a certain amount of ZnO was formed on the deactivated ZnI_2 catalyst.Deactivation of the catalyst could be attributed to the reduction of ZnI_2 amount,resulted from iodine loss and formation of Zn O.It was firstly pointed out from our work that the deactivated catalyst could be well regenerated by the hydrogen iodide(HI) and the tert-butanol compensation method,wherein the latter was added as an initiator into the reaction system.The activity recovery of the deactivated(spent) catalyst might be related to the reformation of ZnI_2 and acceleration of the initiation step of this reaction.
Conversion of methanol (MeOH) to 2,2,3-trimethylbutane (triptane) over zinc iodide (ZnI2) catalyst was investigated in a closed batch reactor. Optimum operating parameters were searched and catalyst deactivation and regeneration behaviors were discussed. The fresh, spent and regenerated catalysts were characterized by XRD, TG and XRF measurements to elucidate the related mechanism. The experimental results showed that the triptane yield reached up to 12.2% under the process conditions, including a reaction temperature of 200 degrees C, an initial pressure of 0.35 MPa, a reaction time of 2 h, and a MeOH to ZnI2 molar ratio of 2. The catalyst was gradually deactivated after several run cycles. A small amount of iodine was lost and a certain amount of ZnO was fonned on the deactivated ZnI2 catalyst. Deactivation of the catalyst could be attributed to the reduction of ZnI2 amount, resulted from iodine loss and formation of ZnO. It was firstly pointed out from our work that the deactivated catalyst could be well regenerated by the hydrogen iodide (HI) and the tert-butanol compensation method, wherein the latter was added as an initiator into the reaction system. The activity recovery of the deactivated (spent) catalyst might be related to the reformation of ZnI2 and acceleration of the initiation step of this reaction.