共查询到20条相似文献,搜索用时 171 毫秒
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介绍了火炬气回收的状况、变压吸附技术、火炬气回收流程。提出火炬气回收工艺中增设变压吸附预分离单元,以回收火炬气中有价值的C2、C3组分。对流程的特点、可行性及经济性进行了分析,指出对于C2、C3体积分数大于5%的火炬气,可采用变压吸附预分离流程回收其有价值组分,将作燃料的火炬气转为作原料更节能、更环保。 相似文献
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介绍大型氨厂普里森氢回收装置投运前后存在的问题及对策;综述了深冷氢回收装置的流程、工艺特点及变压吸附氢回收技术的应用情况;讨论了氢回收装置的发展前景,并作了评价,提出进一步回收弛放气中氢气的方法. 相似文献
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河南汇源化工集团氯碱有限公司经过多方面考察,总结多个使用厂家的实践经验,确定采用变压恒温吸附法回收精馏尾气中VCM的工艺,使排放尾气中的VCM及C2H2含量低于国家排放标准,使VCM和C2H2的回收率大于99.9%,并且实际运用到5万t/a PVC装置。1工艺1.1原理变压恒温吸附法回收工艺采用变压吸附技术(PressureSwing Adsorption,简称PSA)。变压吸附技术是以吸附剂(多孔固体物质)内部表面对气体分子的物理吸附为基础,利用吸附剂在相同压力下易吸附高沸点组分、不易吸附低沸点组分和高压下吸附量增加(吸附组分)、减压下吸附量减小(解吸组分)… 相似文献
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回收FCC干气中乙烯的工艺技术与吸附剂 总被引:7,自引:0,他引:7
概述了回收干气中乙烯的几种工艺技术和高效吸附剂。在我国现有FCC规模和分布的情况下,利用变压吸附法回收FCC干气中的乙烯是行之有效的工艺技术路线,且有较好的经济效益。 相似文献
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稀土复合吸附剂变压吸附混合气中乙烯的研究 总被引:13,自引:0,他引:13
采用以活性炭负载Cu(I)的稀土复合吸附剂对混合气中C2H4的分离进行了研究。实验测定了C2H4、C2H6单组分在稀土复合吸附剂上的吸附平衡,考察了C2H4、C2H6混合体系在稀土复合吸附剂上的变压吸附性能以及O2、CH4、CO2对C2H4在稀土复合吸附剂上吸附性能的影响。实验结果表明,稀土复合吸附剂具有很好的选择性和稳定的变压吸附性能,具有工业应用价值。 相似文献
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草酸二甲酯的气相加氢具有高水平的活性,采用共沉淀法制备需要不同特性规格的沉淀剂,催化剂的组合和反应条件都对乙二醇的合成性质具有明显的性能影响。通过采用独特的吸附方法表征制备的催化剂,以及通过试验获得的值表明草酸二甲酯的独特氢化反应与铜离子的独特活性状态密切相关。此外,通过气相催化得到的乙二醇,草酸二甲酯的比转化率可超过97%;乙二醇的选择性特征高达85%;制备的催化剂突出了最佳的稳定性能。 相似文献
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Carbon dioxide was partially removed from a nitrogen stream, which also contained some ethylene, by adsorption on a 4A (Na-A) zeolite. The treated nitrogen stream was then passed over a 13X (Na-X) zeolite bed upon which ethylene and any remaining carbon dioxide were adsorbed. Ethylene was recovered by desorption at 68 Pa pressure into a slow flow of nitrogen as stripping gas. The ethylene concentration in the extracted gas was extremely dependent on the nitrogen flow-rate, whereas the concentration of carbon dioxide remained practically constant. Thus, it was possible to obtain a gas mixture greatly enriched in ethylene with a reasonably low content of carbon dioxide. 相似文献
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Gas separation in pressure swing adsorption plant . In recent years gas separation in pressure swing adsorption plant has acquired considerable significance as an industrially implemented process. This is particularly true of plant for isolation of pure hydrogen from gas mixtures of various origins. Starting from the underlying principles, this contribution considers the various types of plant for hydrogen isolation, for obtaining carbon monoxide, for recovery of ethylene, for separation of oxygen or nitrogen from the air, and for ozone isolation. 相似文献
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Separation of gas mixtures by pressure swing and thermal swing adsorption processes is an established unit operation in the chemical industry. Mathematical simulations of these processes require precise knowledge of multicomponent gas adsorption equilibria, kinetics, and heats for the system of interest over all conditions of pressure, temperature, gas composition and adsorbate loading encountered by the adsorber during the separation process. Unfortunately, the published data on heats of adsorption are often not adequate. Limited heat data are generally available for pure gas adsorption, heat data for binary gas mixtures are rare, and heat data for mixtures containing three or more components are nonexistent. 相似文献