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asi19木虫 (正式写手)
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帮忙翻译二甲醚合成方面摘要，谢谢
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大家好！下面是有关二甲醚合成方面的摘要，一共三部分，先传第一段落。本人不懂英语，请不要用翻译软件之类翻译！希望英语好的同学帮忙翻译一下，谢谢！ 合成气一步法制二甲醚的研究 二甲醚不仅可作为理想的清洁替代能源，还是重要的化工原料。合成气直接生产二甲醚打破了甲醇合成反应的热力学限制，提高了合成气的单程转化率，并且在工艺路线中具有明显优势。合成气直接制二甲醚的催化剂称之为双功能催化剂，即同时具有甲醇合成功能和甲醇脱水功能。如果甲醇合成组分和甲醇脱水组分相互匹配产生“协同效应”，那么催化剂就具有良好的活性和选择性。所以，研发出性能良好的双功能催化剂具有重要的学术价值和应用价值。 |
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chengcj.2008
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asi19(金币+30,VIP+0):chengcj.2008辛苦了，元旦快乐
asi19(金币+30,VIP+0):chengcj.2008辛苦了，元旦快乐
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本论文采用固定床反应器，对合成二甲醚双功能催化剂及其工艺条件进行了研究。通过催化剂评价，确定了催化剂中甲醇合成组分之间的摩尔比以及甲醇合成组分和甲醇脱水组分之间的最佳配比。采用机械混合法、共沉淀沉积法、胶体沉积法和胶体浸渍法制备了一系列催化剂，其中添加了A、B和C助剂，考察了不同制备方法和助剂对催化剂活性和选择性的影响，用XRD衍射仪对催化剂进行了表征。最后，考察了温度、压力和空速等工艺条件对合成二甲醚双功能催化剂活性和选择性的影响，确定了反应的最佳工艺条件。 加上一句哈：世界二甲醚的主要生产厂家状况 单位：千吨／天 The synthesis and processing conditions of the bis-function catalyst for dimethyl ether were studied by using fixed bed reactor in the paper. The optimal molar ratio of the components of methanol synthesis as well as that of methanol synthesis and methanol dehydration. A series of catalysts were prepared utilizing mechanical mixed method, chemical co-precipitation depositon method, colloid deposition method and colloid impregnation mehtod, respectively. Auxiliary agent A, B and C were also used. The influence of different preparation method and auxiliary agent on the activity and selectivity of the catalyst were researched, and the characterizaton of the catalyst was performed by XRD diffractor. Finally, effect of the factors such as temperature, pressure and space velocity on the activity and selectivity of the catalyst were studied, and the optimized processing conditions were obtained. Situation of the world dimethyl ether-producing enterprises unit: kiloton per day |
8楼2009-01-01 12:12:53
dotty
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2楼2008-12-31 15:03:17
dotty
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刚才用了一下，你看看 哈哈 Not only can be used as an ideal dimethyl ether, or the clean alternative energy of chemical raw materials. Syngas direct production dimethyl ether broke the methanol synthesis of thermodynamics, improving the limit of one-way conversion, and the synthesis process route has obvious advantages. Direct synthesis of dimethyl ether as catalyst, double function catalyst with methanol synthesis function and methanol dehydration function. If the methanol synthesis components and methanol dehydration matching component "synergy, catalyst is good activity and selectivity. Therefore, the development of the double function catalyst has important academic value and practical value. |
3楼2008-12-31 15:03:53
asi19
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4楼2008-12-31 15:15:53
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