共查询到18条相似文献,搜索用时 171 毫秒
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Amomax-10/10H型氨合成催化剂在伍德合成塔的运行总结 总被引:1,自引:0,他引:1
河南中原大化公司30万/t合成氨装置伍德三床层径向氨合成塔运行20年来首次更换催化剂。介绍了Amomax-10/10H型氨合成催化剂的性能;简述了旧催化剂卸出、新催化剂装填及升温还原的过程;总结了Amomax-10/10H型催化剂的使用效果和有待完善的问题。结果表明,采用Amomax-10/10H型催化剂可缩短还原时间,可不启用开工加热炉,降低了合成气压缩机和冰机功耗。 相似文献
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《化工标准.计量.质量》2009,(6):40-40
Amomax-10型(氧化型)、Amomax-10H型(预还原型)氨合成催化剂是我国独创的新型氨合成催化剂,是盘锦南方化学辽河催化剂有限公司和浙江工业大学在实施“专利技术许可使用合同”,对氧化亚铁基氨合成催化剂不断研究开发、不断创新而取得的新的重大科技成果。主要针对Fel—xO基氨合成催化剂在市场应用中反映出的“活性高但衰减较快、易还原、出水快、出水温区窄、与现有工厂工艺设备不相适应、 相似文献
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介绍新型氨合成催化剂Amomax-10/Amomax-10H在辽宁华锦通达化工股份有限公司的装填、升温还原及运行情况,总结还原过程中应注意的事项. 相似文献
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从Amomax-10/10H催化理论和生产实践两个维度提炼了Amomax-10/10H氨合成催化剂升温还原过程关键技术。理论方面, 从还原反应的特点可以推导出还原过程的基本还原原则, 从铁比[w(Fe 2+)/w(Fe 3+)]和铁氧比[n(Fe)/n(O)]角度来推导出了Amomax-10/10H的近似分子式Fe9O10和Fe9O;从Fe含量高和O含量低的角度, 分析了Amomax-10/10H具有良好的催化活性之理论依据;从纳米级钝化膜处于热力学亚稳定状态, 解释了Amomax-10H具有优异的低温还原性能, 以及解释了高低搭配、先易后难、分层串联还原的理论依据。实践方面:遵循“二高四低”、“阶梯式”升温、“不同时提温提压”的还原操作原则, 这是稳定升温还原操作、防止水气浓度超标、保证催化剂活性的必要举措。 相似文献
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王千秋 《精细与专用化学品》2004,12(7):7-8
以钛酸四丁酯为催化剂合成邻苯二甲酸 810酯。研究了催化剂的用量、原料配比、反应温度、反应时间对酯化反应的影响 ,确定了最佳反应工艺条件。 相似文献
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Titanium silicate ETS-10 was found to be a suitable metal catalyst support, having high surface area, high ion exchange capacity and no acidic functions. In this work, ETS-10 was used as a support in preparing ruthenium supported catalyst for Fischer-Tropsch synthesis. Ru/METS-10 catalytic systems (M standing for Na or K) showed some important characteristics, as good metal dispersion and shape selectivity. Moreover, no side reactions due to acidic functions were evidenced; indeed readsorption of olefins on active metal centers was found to control the activity of the catalysts.In part presented at 10th IZC, Garmisch-Partenkirchen, July 1994. 相似文献
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Xiaojun Ni Mei Xiang Wenqian Fu Yuli Ma Pengyuan Zhu Wenchang Wang Mingyang He Keqin Yang Jing Xiong Tiandi Tang 《Journal of Porous Materials》2016,23(2):423-429
Developing highly active heterogeneous catalyst with strong basicity and porous structure is a highly attractive strategy for the base-catalyzed organic chemistry. Herein, we directly synthesized the mesoporous zeolite ETS-10 (METS-10) from using a water glass contained cationic copolymer with quaternary ammonium groups as a template. Furthermore, when the nickel nitrate solution was added into the starting synthesis gel, the nickel species facilitated the mesopore formation, and the Ni-containing mesoporous zeolite ETS-10 (Ni-METS-10) was obtained. Catalytic test results showed that the conversions of the benzaldehyde and citral over Ni-METS-10 (88.8 and 63.2 %) and METS-10 (85.5 and 60.1 %) catalysts are higher than those over both mesopore-free ETS-10 (77.3 and 47.7 %) and mesoporous NaX (MNaX, 55.0 and 35.2 %) catalysts in the condensation reactions with ethyl cyanoacetate. The higher activity of METS-10 and Ni-METS-10 than ETS-10 and MNaX is assigned to the fact that the strong basic sites on the catalysts can activate the reaction substrate and the mesoporous in the catalyst benefit the mass transfer and enhance the catalytic activity. 相似文献
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介绍Amomax-10/10H型催化剂的性能,对更换后催化剂在三床层径向合成塔的装填、升温还原及运行情况进行总结。 相似文献