化工进展Issue(1)：150-156,7.DOI:10.16085/j.issn.1000-6613.2016.01.020
助剂硼对K2O-Cr2O3/γ-Al2O3催化剂异丁烷脱氢性能的影响
Influence of boron additive on the performance of K2O-Cr2O3/γ-Al2O3 catalysts in isobutane dehydrogenation
蒋晓阳 1周广林 1樊彤彤 1崔丹丹 1周红军1
作者信息
- 1. 中国石油大学 北京 新能源研究院，北京 102249
- 折叠
摘要
Abstract
Boron modified K2O-Cr2O3/γ-Al2O3 catalysts were prepared by incipientimpregnation. The resulting catalysts had 2% of K2O and 12% of Cr2O3,but different B amout and were investigated under 560℃,isobutane GHSV of 400h−1 and atmosphere in a fixed-bed reactor for its performance in isobutane dehydrogenation. Meanwhile,the catalysts were characterized by means of BET,XRD, NH3-TPD and O2-TPO. The results showed that,the addition of B had no significant influence on the structure of the catalysts,but efficiently adjusted the surface acidity of the catalysts,which thereby inhibited the side reaction of cracking and carbon formation,and improved the isobutene selectivity and stability in consequence. However,too much addition of B would result in the aggregation of Cr2O3,leading to a decrease of isobutane conversion considering the catalytic activity,stability and isobutene selectivity of the catalysts,we proposed the proper B capacity was around 1.0%.关键词
烷烃/异丁烷/脱氢/氧化铝/催化剂/硼改性Key words
alkane/isobutane/dehydrogenation/alumina/catalyst/boron modification分类
化学化工引用本文复制引用
蒋晓阳,周广林,樊彤彤,崔丹丹,周红军..助剂硼对K2O-Cr2O3/γ-Al2O3催化剂异丁烷脱氢性能的影响[J].化工进展,2016,(1):150-156,7.
