The 63rd Annual Meeting of Jpn. Petrol. Inst. (The 69th R&D Symposium of JPI)
May 24 - May 25, 2021
The 63rd Annual Meeting of Jpn. Petrol. Inst. (The 69th R&D Symposium of JPI)
May 24 - May 25, 2021
[B04]Control of hydrocarbon oligomerization in phosphorus modified CHA zeolite and its prolonged catalytic lifetime in methanol-to-olefin reaction
○Nao Tsunoji1, Ryota Osuga2, Toshiyuki Yokoi2(1. Hiroshima University, 2. Tokyo Institute of Technology)
Keywords:
CHA zeolite,phosphorus modification,methanol to olefin reaction
Prolonged catalytic lifetime in the methanol to olefin (MTO) reaction was achieved by the direct phosphorus modification of CHA zeolite using tetraethylphosphonium as a phosphorus modifying agent (P-MA). The P-MA was firstly introduced into the zeolite pore system during the hydrothermal synthesis system, then its decomposition by calcination caused to form phosphorus oxide interacting with zeolite framework. A combinational analytical method of the CHA zeolite catalysts before and after the MTO reaction revealed that the inhibited excess oligomerization of hydrocarbon, tuned by the phosphorus modification, resulted in a prolonged catalytic lifetime.