| 王广建,孙兴源,牛鑫善,王芳.化学通报,2017,80(2):208-211,215. |
| 水热改性对铝基载体孔结构及异丁烷脱氢性能的影响 |
| Effects of hydrothermal treatment on pore structure of aluminium-based carriers and the performance of CrOx/Al2O3 catalyst forisobutane dehydrogenation |
| 投稿时间：2016-07-04 修订日期：2016-09-16 |
| DOI： |
| 中文关键词: 氧化铝水热改性 水热介质 CrOx/Al2O3催化剂 异丁烷脱氢 |
| 英文关键词:alumina hydrothermal treatment hydrothermal solvents CrOX/Al2O3catalyst isobutane dehydrogenation |
| 基金项目:国家自然科学基金资助项目(21276130,21506107) |
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| 摘要点击次数: 2036 |
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| 中文摘要: |
| 分别以两种水热介质对γ-Al2O3载体进行水热改性,并将改性后的载体应用于异丁烷催化脱氢,考察了水热改性对催化脱氢性能以及水热温度对氧化铝载体物化性质的影响。并进行了XRD、N2吸附-脱附及H2-TPR表征。结果表明,γ-Al2O3发生再水合过程,焙烧后,结晶度变好,活性组分与载体的相互作用增加,水热改性会改变氧化铝的孔结构,CrOx/Al2O3催化剂的异丁烷脱氢性能得到改善。以水热介质1溶液(HTT-1)水热改性载体,140 ℃处理4 h,CrOx/Al2O3催化剂表现出最优的异丁烷脱氢性能,10 h内异丁烷脱氢平均转化率为43.04 %,平均选择性86.34 %,失活参数13.7 %。 |
| 英文摘要: |
| γ-Al2O3 carriers were modified by hydrothermal treatment with two hydrothermal solvents and applied in isobutaue dehydrogention catalyst, the effect of catalytic dehydrogenation performance was studied using modified carriers. In addition, the effect of hydrothermal treatment temperature on physicochemical properties of alumina was also investigated and modified γ-Al2O3 carriers were characterized by XRD, N2 adsorption-desorption and H2-TPR. The results showed that the crystallinity of γ-Al2O3 was increased after hydration and calcination process, Hydrothermal treatment enhanced the interaction of active component and carriers, changed pore structure of γ-Al2O3 and improved the performance of CrOx/Al2O3. By hydrothermal treatment with hydrothermal solvent (HTT-1) , CrOx/Al2O3 catalyst exhibited the optimal isobutane dehydrogenation performance when supports were treated at 140 ℃for 4 h, isobutane dehydrogenation average conversion, average selectivity and deactivation ratio were 43.04 %, 86.34 % and 13.7 %, respectively, for reaction 10 h. |
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