Base strength evaluation of solid base by temperature-programmed desorption using propylene as probe

Research Project

Project/Area Number	26420783
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Research Field	Catalyst/Resource chemical process
Research Institution	Hokkaido University of Education
Principal Investigator	Matsuhashi Hiromi 北海道教育大学, 教育学部, 教授 (70192341)
Project Period (FY)	2014-04-01 – 2017-03-31
Project Status	Completed (Fiscal Year 2016)
Budget Amount *help	¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000) Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000) Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords	昇温脱離 / 固体塩基 / プロピレン / 塩基強度 / 活性化エネルギー / 逆アルドール反応
Outline of Final Research Achievements	Base strength of solid base was evaluated by applying a temperature-programmed desorption using hydrocarbons (propane, propylene, isobutene, and isobutene). Adsorption of hydrocarbons on CaO, which was activated by heating at 773 K for 2h, was performed at 143 K, and temperature increasing rate was 1 K/min in He stream. Peak temperatures of each hydrocarbons were 172 K, 193 K, 206 K, and 228 K for propane, propylene, isobutene, and isobutene, respectively. This result indicates that these was an acid-base like interaction between hydrocarbons and base sites. The strength of this acid-base like interaction was evaluated as an activation energy of desorption of propylene.