| ZSM-5分子筛酸分布对丁烯裂解制丙烯性能的影响 |
| |
| 引用本文： | 张新元,张飞,张明森. ZSM-5分子筛酸分布对丁烯裂解制丙烯性能的影响[J]. 石油化工, 2011, 40(9): 926-931 |
| |
| 作者姓名： | 张新元 张飞 张明森 |
| |
| 作者单位： | 中国石化 北京化工研究院,北京,100013 |
| |
| 摘 要： | 以硝酸钙为改性剂处理ZSM-5分子筛孔道内及外表面的酸中心,得到一系列酸分布不同的钙改性ZSM-5分子筛催化剂,并采用XRD,SEM,BET,XRF,NH_3-TPD等技术对催化剂的物化性质进行表征;在连续流动固定床反应器上研究了分子筛孔道内及外表面的酸分布对丁烯裂解制丙烯反应性能的影响。实验结果表明,钙改性ZSM-5分子筛的酸量是丁烯裂解活性的决定因素,酸量越多,催化剂催化丁烯裂解的活性越高;丙烯选择性主要受催化剂酸强度的影响,降低酸强度有利于提高丙烯选择性;ZSM-5分子筛外表面酸中心在丁烯催化裂解制丙烯过程中起主要作用,改性时保留外表面酸中心有利于提高丙烯选择性。
|
| 关 键 词： | ZSM-5分子筛 表面酸性 丁烯 丙烯 催化裂解 |
Effect of ZSM-5 Zeolite Acid Distribution on Butene Cracking to Propylene |
| |
| Zhang Xinyuan,Zhang Fei,Zhang Mingsen. Effect of ZSM-5 Zeolite Acid Distribution on Butene Cracking to Propylene[J]. Petrochemical Technology, 2011, 40(9): 926-931 |
| |
| Authors: | Zhang Xinyuan Zhang Fei Zhang Mingsen |
| |
| Affiliation: | Zhang Xinyuan,Zhang Fei,Zhang Mingsen (Beijing Research Institute of Chemical Industry,SINOPEC,Beijing 100013,China) |
| |
| Abstract: | A series of ZSM-5 catalysts with different acid distribution were prepared by the treatment of the acid centers located on the zeolite channel and/or outer surface with calcium nitrate as the modifier.The catalysts were characterized by means of XRD,SEM,BET,XRF and NH_3-TPD.The effect of the ZSM-5 acid distribution on butene cracking to propylene was investigated on a continuous fixed-bed reactor.The results manifested that the butane conversion was determined by the acid amount and raised with increasing o... |
| |
| Keywords: | ZSM-5 zeolite surface acidity butene propylene catalytic cracking |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《石油化工》浏览原始摘要信息 |
|
点击此处可从《石油化工》下载全文 |
|
