摘要
制备了LiClO4 ,Pb3 (PO4 ) 2 和LiClO4 ·Pb3 (PO4 ) 2 复合物催化剂 ,用XRD和IR表征了催化剂的晶相及表面结构 ,并用化学吸附IR和TPD研究了催化剂样品对乙烷的化学吸附性能 ,用LSSR考察了乙烷氧化脱氢生成乙烯的反应规律 .结果表明 ,催化剂表面的ClO和PO键是乙烷的主要吸附位 .LiClO4 与Pb3 (PO4 ) 2 的相互作用促进了 ClO 键对乙烷的吸附活化能力 .在一定反应条件下 ,乙烷转化率与体系的能量利用率有关 ,复合物催化剂比单纯的LiClO4 和Pb3 (PO4 ) 2 可更有效地利用激光光能 .
LiClO 4, Pb 3(PO 4) 2 and complex compound LiClO 4·Pb 3(PO 4) 2 were prepared, and the crystal and surface structure of the compounds were investigated using XRD and IR. The chemisorption properties of C 2H 6 on these compounds were studied with IR and TPD. The reaction of C 2H 6 oxydehydrogenation to C 2H 4 was studied with laser stimulated surface reaction (LSSR). The results showed that, the main adsorption sites for C 2H 6 are Cl O and PO bonds on the surfaces of the catalyst. In complex compound LiClO 4·Pb 3(PO 4) 2, the interaction of LiClO 4 with Pb 3(PO 4) 2 can promote the adsorption ability of Cl O bond. In LSSR, the C 2H 6 conversion was determined by the efficiency of laser energy. The complex compound LiClO 4·Pb 3(PO 4) 2 can use laser energy more effective than LiClO 4 and Pb 3(PO 4) 2. Increasing temperature can enhance the C 2H 6 conversion without decreasing the C 2H 4 selectivity.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2000年第2期147-150,共4页
关键词
高氯酸锂
磷酸铅
乙烷
乙烯
LSSR
激光化学
lithium perchlorate, lead phosphate, ethane, oxydehydrogenation, ethylene, laser pulse, surface reaction
