钾对铬催化剂脱氢环化反应的影响
Diisobutylene Dehydrocyclization over Chromium Catalysts Modified by K
查看参考文献19篇
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文摘
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采用等体积分步浸渍法制备了不同K_2O含量的K-Cr_2O_3/Al_2O_3催化剂,并用BET、XPS、UV-Vis、H_2-TPR、NH_3-TPD和TG等技术对催化剂进行了表征,考察了催化剂对二异丁烯(2,4,4-三甲基戊烯)脱氢环化为对二甲苯的催化性能.结果表明,K不仅可以降低氧化铝载体的酸性,而且促进了活性组分Cr在载体表面的分散.K_2O含量为1.5%时,催化剂的脱氢环化性能达到最佳. |
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其他语种文摘
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A series of K-Cr_2 O_3/Al_2O_3 catalysts with different K_2O contents for dehydrocyclization of diisobutylene (2, 4, 4-Trimethyl-pentene) were prepared by two-step incipient wetness impregnation. The samples were characterized by BET, XPS, UV-Vis, H_2-TPR, NH_3-TPD and TG methods. The dehydrocyclization reaction in the presence of K-Cr_2 O_3/Al_2O_3 catalysts was studied. The results showed that the addition of K can reduce the acidity of the alumina support, and promote the dispersion of Cr on surface of catalysts. The optimal results could be obtained when 1.5% K_2O was loaded. |
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来源
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分子催化
,2013,27(2):131-137 【核心库】
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关键词
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氧化铬
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钾
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对二甲苯
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脱氢环化
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地址
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中国科学院兰州化学物理研究所, 羰基合成与选择氧化国家重点实验室, 甘肃, 兰州, 730000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1001-3555 |
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学科
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化学;化学工业 |
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基金
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苏州市科技局应用基础研究计划
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文献收藏号
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CSCD:4826212
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