Development of zeolite having specific catalysis provided by transition metal single site

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K05154
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27030:Catalyst and resource chemical process-related
• Research Institution: The University of Kitakyushu
• Principal Investigator: IMAI HIROYUKI 北九州市立大学, 国際環境工学部, 准教授 (70514610)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: ゼオライト / 単核サイト / 脱水素反応 / 脱水素環化 / 金属複合体 / アルカン

Outline of Final Research Achievements

In this study, novel catalysts with specific catalysis have been synthesized by highly dispersing single metal atoms in zeolite to apply them to the dehydrogenation and dehydrocyclization of alkanes for providing olefins and aromatic compounds. The Zn-containing zeolite was successfully synthesized through the heating of the starting gel of zeolite at low temperatures followed by the hydrothermal synthesis. The catalyst synthesized by dispersing Pt on Zn-containing zeolite exhibited much high catalytic activities for the dehydrogenation and dehydrocyclization of alkanes. Furthermore, the synthesized catalyst suppressed the isomerization, cracking, and oligomerization of hydrocarbons including alkanes and products owing to no strong Bronsted acid site, leading to selectively producing olefins and aromatic compounds with the same carbon numbers as those of the starting alkanes.

Free Research Field

触媒化学

Academic Significance and Societal Importance of the Research Achievements

本研究では，金属元素を単原子状でゼオライト中に導入する手法を開発した。この手法により，ゼオライト中への導入が困難な遷移金属類を，直接かつ高含有量でも導入でき，また，多様な金属元素に適用できることから，遷移金属類由来の特異な物性をゼオライトに付与できるようになった。特に，開発ゼオライトに貴金属を複合させることで，炭化水素の炭素数を保持したまま，選択的に脱水素・脱水素環化を起こせることから，様々な炭素資源を対象として，炭素の無駄がなく，化学品原料への高付加価値化の達成が期待される。