【摘要】 用Ｌｉ＋部分替代ＭＴｉＯ３（Ｍ＝Ｃａ、Ｓｒ）催化剂中的Ｔｉ４＋，明显地提高了乙烷氧化脱氢（ＯＤＨＥ）反应中乙烯的选择性。在ＣａＴｉ０．９Ｌｉ０．１Ｏ３－δ催化剂上，反应温度为８５０℃时，乙烯选择性为７７．４％，乙烷转化率为８１．７％。Ｌｉ掺杂的作用是增加了催化剂的Ｐ型半导性和未充分还原的氧物种数目。更多还原

【Abstract】 When Li + was partially substituted for Ti 4+ in MTiO 3 (M=Ca, Sr), a remarkable improvement in the C 2H 4 selectivity was observed for the oxidative dehydrogenation of ethane (ODHE). A C 2H 4 selectivity of 77.4% and a C 2H 6 conversion of 81.7% could be obtained over CaTi 0.9 Li 0.1 O 3-δ at 850℃. The effects of Li doping were explained by the increment of p semiconductivity and non fully reduced oxygen species.更多还原