摘要
甲烷氧化偶联反应是近年来研究十分活跃的反应,开发的催化剂体系多种多样,各有特点,活性相近,但尚没有一致公认的优良催化剂体系,根据我国稀土资源丰富的特点,本文旨在开发含稀土的复合氧化物新催化剂体系并探讨其催化行为。
Rare earth oxides have been used as catalysts for the oxidative coupling of methane,La_2O_3 and Sm_2O_3 showed higher C_2 selectivity. The mixture of La_2O_3 and alkaline earthoxide was found to be effective for oxidative coupling, among them binary oxide of La-Ba(1: 1) gave the highest C_2 yield, up to 20%. It is suggested that there could be a combina-tion effect of this binary system due to the structural influences, such as the specific sur-face area. Based on the temperature dependence of the products distribution, a mechanism ofthe reaction was proposed.
出处
《应用化学》
CAS
CSCD
北大核心
1990年第4期75-77,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金
关键词
稀土氧化物
催化剂
甲烷
氧化偶联
methane
oxidative coupling
catalyst
rare earth oxide
