| 李海涛,陈昊然,张因,高春光,赵永祥.碳改性对Ni/Al2O3催化剂顺酐加氢合成γ-丁内酯反应性能的影响[J].分子催化,2010,(5):0 |
| 碳改性对Ni/Al2O3催化剂顺酐加氢合成γ-丁内酯反应性能的影响 |
| Effect of Carbon Modification on Ni/Al2O3 Catalyst for Hydrogenation of Maleic Anhydride to Butyrolactone |
| 投稿时间：2010-07-21 修订日期：2010-09-01 |
| DOI： |
| 中文关键词: 碳包覆氧化铝 负载镍催化剂 加氢 顺酐 γ-丁内酯 |
| 英文关键词:Carbon-Covered Alumina Ni supported catalyst Hydrogenation Maleic anhydride Butyrolactone |
| 基金项目:国家高技术研究发展计划（863计划）;国家自然科学基金（21073114） |
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| 中文摘要: |
| 通过热解蔗糖/Al2O3前驱体的方法制备了炭包覆改性Al2O3（CCA）载体，并采用等体积浸渍制备了负载量17 %的镍基催化剂。对载体及相应催化剂进行了TPO-MS、N2物理吸附、TPR、XRD等测试表征，并考察了催化剂顺酐(MA)加氢合成γ-丁内酯(GBL)的反应性能。结果表明，适量炭的引入改变了载体Al2O3的表面性质，使金属-载体相互作用减弱，活性组分镍的分散度提高，催化剂在MA加氢反应中表现出高的GBL选择性。当Al2O3中引入8.9 %的炭时，催化剂表现出最高的催化活性，在210 °C，5 MPa氢气压力下反应3 h时，MA转化率达98%以上，GBL选择性达91.71 %。 |
| 英文摘要: |
| Carbon-covered alumina (CCA) was prepared by the pyrolysis of the sucrose dispersed on a γ-Al2O3 support. And 17% loading Ni supported catalysts were prepared by impregnation method. Effect of carbon addition on Ni/Al2O3 catalytic performance was investigated for the hydrogenation of maleic anhydride (MA) to butyrolactone (GBL). The samples were characterized by TPO-MS, N2 adsorption, TPR and XRD. The results indicated that the addition of carbon resulted in the change of the surface property of Al2O3 support, the Ni dispersion and metal-support interaction of the catalysts. This makes the catalysts showed different hydrogenation activity. When the carbon loading was about 8.9%, the catalyst showed the highest Ni dispersion and the mild metal-support interaction. The catalyst exhibited the highest selectivity of GBL for the hydrogenation of MA. At conditions of 210 癈, 5 MPa hydrogen pressure and reaction time 3 h, the conversion of MA was above 98% and the selectivity of GBL was 91.71 %。 |
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