文献类型：期刊文献

中文题名：制备条件对Pt/SO_4^(2-)/ZrO_2-Al_2O_3异构化性能的影响

英文题名：Effect of preparation conditions on isomerization performance of Pt/SO_4^(2-)/ZrO_2-Al_2O_3 catalyst

作者：乐晓光[1];徐俊[1];宋月芹[1];周晓龙[1]

机构：[1]华东理工大学化工学院石油加工研究所,上海200237

年份：2015

卷号：34

期号：2

起止页码：419

中文期刊名：化工进展

外文期刊名：Chemical Industry and Engineering Progress

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金(21103049);江苏省大气环境监测与污染控制高技术研究重点实验室开放基金(KHK1106)项目

语种：中文

中文关键词：制备;干燥;Pt/SO4^2-/ZrO2-Al2O3;烷烃;加氢异构

外文关键词：preparation; drying; Pt/SO4^2-/ZrO2-Al2O3; alkane; hydro-isomerization

摘要：采用沉淀法制备了Pt/SO42-/Zr O2-Al2O3(Pt SZA)催化剂,考察了氢氧化锆水凝胶干燥速率、锆盐浓度、铂含量、Al2O3和SO42-添加顺序等制备条件对Pt SZA异构化性能,尤其是低温异构化性能的影响,并用XRD和TG对催化剂进行了表征。结果表明,提高水凝胶的干燥速率降低了Pt SZA催化剂中的硫含量,大大提高了催化剂中的单斜相,进而导致了催化剂低温失活加速以及高温活性下降。较低或较高的锆盐浓度劣化了Pt SZA的低温异构化稳定性,以0.4~0.6mol/L硝酸氧锆制备的催化剂硫含量和四方相氧化锆含量较高,异构化活性相对较好,Al2O3和SO42-添加顺序对Pt SZA异构化性能没有明显影响。
Pt/SO4^2-/ZrO2-Al2O3（PtSZA） catalyst was prepared by the precipitation method. The influences of preparation conditions,such as drying rate of Zr（OH）4 hydrogel,zirconium concentration,platinum content and addition order of Al2O3/SO4^2-on isomerization performance of PtSZA catalyst,especially low reaction temperature isomerization performance were investigated. The crystalline structure and sulfur content of PtSZA were characterized with XRD and TG,respectively. Increase of drying rate of Zr（OH）4 hydrogel led to decrease of sulfur content and remarkable increase of monoclinic phase in PtSZA catalyst,and then to rapid deactivation of the catalyst at low reaction temperature and a lower catalytic activity at high reaction temperature. Too low or too high zirconium concentration was unfavorable to the low reaction temperature stability of PtSZA catalyst. The PtSZA sample prepared with 0.4—0.6mol/L zirconium concentration showed higher sulfur content,more tetragonal phase and higher catalytic activity than that prepared with other zirconium concentration. The effect of addition order of Al2O3 and SO4^2- on isomerization performance was negligible.