摘要
用化学吸附 IR ,化学吸附 TPD和微反技术研究了超细Fe Al P O催化剂的化学吸附性能及对乙烷部分氧化反应的催化性能 .结果表明 ,乙烷能够以 CH3 中的H原子吸附于催化剂表面P =O键的端氧上形成分子吸附态 ,并且随着吸附温度的升高 ,对乙烷的吸附强度逐渐增大 ;乙烯则主要是以C =C双键吸附在催化剂的Lewis酸位Fe3 + 上 .乙烷部分氧化反应的主要产物为乙烯和COx,但在反应物中引入氢的条件下 ,乙烷部分氧化反应的性能大为改善 ,并可生成乙醇和乙醛等含氧化合物 .
The chemisorption and reactivity of ethane on Fe-Al-P-O catalyst were systemically characterized by IR, TPD and micro-reactor techniques. The results showed that C 2H 6 can be adsorbed on the surface terminal oxygen of Lewis base site P=O bonds through H atom in -CH 3 to form a molecular adsorption state, and the adsorption intensity of C 2H 6 increases with the rising of adsorption temperature. Ethene can be chemisorbed on the Lewis acid site Fe 3+ through C=C bond. The products of ethane partial oxidation on Fe-Al-P-O catalyst are mainly C 2H 4 and CO x. However, the addition of H 2 in the feed can initiate the selective oxidation of ethane to C 2 oxygenates.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2003年第8期609-612,共4页
基金
国家自然科学基金资助项目 (2 97730 31)
国家重大基础研究前期专项基金资助项目 (2 0 0 1CCA0 36 0 0 )
关键词
铁
铝
磷
复合氧化物
化学吸附
乙烷
部分氧化
iron, aluminum, phosphorus, composite oxide, chemisorption, ethane, partial oxidation
