Synergistic effects of tungsten and phosphorus on catalytic cracking of butene to propene over HZSM-5
Synergistic effects of tungsten and phosphorus on catalytic cracking of butene to propene over HZSM-5
复制标题
钨和磷在HZSM-5催化裂解丁烯制丙烯中的协同效应
DOI：
10.1016/j.apcata.2008.09.029
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发表时间：
2009-01-15
影响因子：
5.5
通讯作者：
Chen, Yi
中科院分区：
文献类型：
--
作者：
Xue, Nianhua;Nie, Lei;Chen, Yi
通过催化实验证实了钨、磷和HZSM-5对1-丁烯裂解制丙烯和乙烯的协同催化作用。钨磷改性HZSM-5 （WP/HZSM-5）催化剂具有很低的酸位密度，丁烯转化率和丙烯选择性较高。采用D-2/OH交换、NH3吸附微量热法、FT-IR光谱、拉曼光谱、N-2吸附和x射线光电子能谱等技术对掺杂钨的状态进行了表征。在蒸汽处理前，钨是与磷相互作用的单钨酸盐，在高温蒸煮过程中，部分钨聚集成多钨酸盐。1-丁烯裂解制丙烯和乙烯催化剂性能的增强可能与掺杂钨和磷对裂解过程反应网络的协同作用有关。W-P/HZSM-5是一种很有前途的1-丁烯裂解制丙烯和乙烯催化剂。(C) 2008 Elsevier B.V.版权所有
Synergistic catalysis effects among tungsten, phosphorus and HZSM-5 on 1-butene cracking to propene and ethene have been demonstrated by catalytic tests. The tungsten-phosphorus-modified HZSM-5 (WP/HZSM-5) catalyst, with very low density of acid sites, offers a fairly high conversion rate of butene and selectivity to propene. The status of doped tungsten is characterized by using techniques of D-2/OH exchange, NH3 adsorption microcalorimetry, FT-IR spectroscopy, Raman spectroscopy, N-2 adsorption and X-ray photoelectron spectroscopy. The tungsten would be monotungstate that interacted with phosphorus before steam treatment and partly congregated to polytungstate species during steaming process at high temperature. The enhanced performance of the catalyst for 1-butene cracking to propene and ethene can be correlated to the synergistic effect between the doped tungsten and phosphorous on the reaction network of the cracking process. The W-P/HZSM-5 is a promising catalyst for the 1-butene cracking to propene and ethene. (C) 2008 Elsevier B.V. All rights reserved.