燃料化学学报2017，Vol.45Issue(3)：329-336,8.
载体对Pt/WO3-ZrO2催化临氢异构反应性能的影响
Effect of supports on the catalytic performance of Pt/WO3-ZrO2 catalysts for hydroisomerization
李伟 1迟克彬 2马怀军 3刘浩 1曲炜 1田志坚1
作者信息
- 1. 中国科学院大连化学物理研究所, 辽宁 大连 116023
- 2. 中国科学院大学, 北京 100049
- 3. 中国石油天然气股份有限公司 石油化工研究院, 北京 102206
- 折叠
摘要
Abstract
A series of WO3-ZrO2 solid acids were synthesized by calcining the equilibrium adsorbed peroxotungstic acid/hydrated zirconia precursors.The influences of peroxotungstic acid concentration and calcination temperature on the composition, structure and acidity of the obtained solid acids were evaluated by using XRD, UV-vis and NH3-TPD.Pt/WO3-ZrO2 catalysts were prepared by impregnation method and characterized by BET, H2-TPR and H2-TPD.The catalytic performance in the hydroisomerization of n-pentane was investigated.It was found that under the same calcination temperature, both the support acidity and the catalyst surface area first increase and then decrease with the increase of peroxotungstic acid concentration, and are maximized when the peroxotungstic acid concentration reaches 82mmol W/L.When the peroxotungstic acid possesses the same concentration of 59mmol W/L, the tetragonal zirconia fraction, support acidity and the catalyst surface area decrease with the increase of calcination temperature.When the peroxotungstic acid concentration and the calcination temperature of the support are 82mmol W/L and 700℃ respectively, the obtained catalyst shows the best catalytic performance.The yield of isopentane reaches 57.7% under the reaction condition of ambient pressure, 250℃, n(H2)/n(n-C5H12) =3 and WHSV =1.0h-1.关键词
Pt/WO3-ZrO2/平衡吸附/正戊烷/临氢异构Key words
Pt/WO3-ZrO2/equilibrium adsorption/n-pentane/hydroisomerization分类
化学化工引用本文复制引用
李伟,迟克彬,马怀军,刘浩,曲炜,田志坚..载体对Pt/WO3-ZrO2催化临氢异构反应性能的影响[J].燃料化学学报,2017,45(3):329-336,8.
