摘要
考察了碱土金属钙助剂对Pt Zn/SBA-15催化剂丙烷脱氢性能的影响,通过XRD,BET,TG,NH3-TPD,TEM等表征手段对影响原因进行了分析。表征结果显示,锌和钙助剂的添加能够使Pt Zn Ca/SBA-15催化剂中的铂粒子分散均匀,粒径减小,部分进入分子筛孔道内部;反应中产生的积碳主要沉积在载体表面,未覆盖催化剂活性中心。实验结果表明,Pt Zn Ca/SBA-15催化剂具有良好的丙烷脱氢性能,在反应温度为600℃的条件下,稳定反应70 h以上,丙烷转化率为40%左右,丙烯选择性约为96%。
The effects of calcium on the performance of PtZn/SBA-15 catalysts were investigated. The catalysts and carrier were characterized by XRD,BET,TG,NH3-TPD,and TEM. The results showed that part of the active components can enter the mesoporous channels of the SBA-15 carrier. And the coke produced in the reaction mainly deposits in the surface of the carrier. The experimental results showed that the PtZnCa/SBA-15 catalyst had good performance in the dehydrogenation of propane. After 70 h on stream,the propane conversion rate remains about 40%,the propylene selectivity remains about 96% under the reaction temperature at 600 ℃.
作者
冯静
张明森
刘红梅
徐向亚
Feng Jing Zhang Mingsen Liu Hongmei Xu Xiangya(Sinopec Beijing Research Institute of Chemical Industry,Beijing 100013,China)
出处
《石油化工》
CAS
CSCD
北大核心
2017年第7期845-849,共5页
Petrochemical Technology
