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低温吸附是一种有效的氢同位素分离方式,是国际热核实验堆(ITER)、聚变-裂变混合堆中包层氚提取系统和含氚重水氚回收系统的优选方案之一。课题组采用低温气相色谱技术研制了氢同位素分离装置,开展了氘-氢体系实验。实验结果表明:(1)分离装置的研制是成功的,实现了长期、连续、安全的运行;(2)分离效率高。既可以将天然丰度的氘氢样品浓缩至90%以上,也可以将氘丰度为0.08%的样品混合气分离后得到氘丰度为30%的产品,贫化部分氘丰度小于10^-5;(3)处理容量大。对氕-氘混合气的处理容量达到100m3/a的规模。 相似文献
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低温热色谱分离氢同位素 总被引:4,自引:0,他引:4
叙述了用“601”碳分子筛作托卡马克废气排出气的收集、纯化和低温热色谱的进样单元,以5A分子筛柱在液氮(LN2)温度下吸附氕、氘,氚,随后把柱温回升至室温(20℃~30℃),为了提高分离效率、缩短分离时间和分离柱总长度,在两根分离柱间添加了HD、HT等歧化平衡器,经过四根分离柱组成的级联分离柱后氕、氘、氚获得了清晰分离。该装置的单次进样量为5标准升,日处理量为120~180标准升,流程气体总回收率>97%,氘丰度>99.9%时,氘、氚损失量(不计加热300℃活化再生分离柱回收的氘、氚)<5%,除氕效率>98%。 相似文献
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本文介绍了氢同位素纯化、分离用钯合金膜的制备技术、种类及其应用情况。根据实际应用情况并分析其优缺点,钯基复合膜其综合性能优异成为今后钯基膜的发展方向,同时还要研发机械强度和耐热性更高的膜支撑体及低成本钯基膜的制备方法,探索高使用寿命、高透过率的新型复合膜。 相似文献
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隔板蒸馏塔技术及其在空气分离中的潜在应用 总被引:1,自引:0,他引:1
隔板蒸馏塔是完全热耦合蒸馏,具有节能、投资低的优点。文章介绍了隔板蒸馏塔的原理、结构及设计方法,并指出了它在空气分离中的潜在应用。 相似文献
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The fugacity coefficients of hydrogen in binary mixtures with carbon dioxide were measured using a physical equilibrium technique. This technique involves the use of an experimental chamber which is divided into two regions by a semipermeable membrane. Hydrogen can penetrate and pass through the membrane, while the other component (in this case carbon dioxide) cannot. At equilibrium, pure hydrogen will permeate into one compartment of the chamber, while the binary mixture occupies the other compartment. Thus, the pressure of pure hydrogen on one side of the membrane approaches the partial pressure of hydrogen in the mixture on the other side of the membrane. This allows the direct measurement of the hydrogen component fugacity at a given mixture mole fraction. In this study, results are reported for measurements made on the hydrogen+carbon dioxide binary at 80°C (353 K), 130°C (403 K), 160°C (433 K), and 190°C (463 K), each at a total mixture pressure of 3.45 MPa. The experimental results are compared with predictions from the Redlich-Kwong, Peng-Robinson, and extended corresponding-states models. 相似文献
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气体分离膜应用的现状和未来 总被引:7,自引:0,他引:7
考虑了气体分离膜应用和气体传递机理的各种技术.现在商业气体分离膜应用的范围包括:富氮、富氧、氢回收、从天然气中除去酸性气体(CO2和H2S)、天然气脱水和有价值的挥发有机物(VOCs)的回收.讨论了每一个应用中可用膜材料的现状和限度,及有潜在力的若干新膜的应用,如乙烯/乙烷分离和燃料电池. 相似文献
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通过正硅酸乙酯与苯基三乙氧基硅烷共水解缩聚反应制备苯基修饰SiO2膜,研究膜材料的氢气渗透和分离性能,并将其作为膜反应器的关键材料应用于水煤气变换反应.结果表明,氢气在苯基修饰SiO2膜中的渗透率随着温度的升高而增大,遵循活化扩散机理,300℃下H2渗透率达到4.67×10-7 mol/(m2·s·Pa),理想分离系数H2/CO、H2/CO2和H2/SF6分别达到10.54、10.50、21.16.在300℃,反应物H2O/CO摩尔比为2∶1的条件下进行水煤气变换反应,膜反应器的CO的转化率比传统固定床反应的CO的转化率高约12%,其原因是苯基修饰的SiO2膜对H2具有一定的选择性. 相似文献
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The fugacity coefficients of hydrogen in binary mixtures with methane and propane were measured using a physical equilibrium technique. This technique involves the use of an experimental chamber which is divided into two regions by a semipermeable membrane. Hydrogen can penetrate and pass through the membrane, while the other component (in this case, methane or propane) cannot. At equilibrium, pure hydrogen will permeate into one compartment of the chamber, while the binary mixture occupies the other compartment. Thus, the pressure of pure hydrogen on one side approaches the partial pressure of hydrogen in the mixture on the other side of the membrane. This allows a direct measurement of the hydrogen component fugacity at a given mixture mole fraction. In this study, results are reported for measurements made on the hydrogen+propane binary at 80°C (353 K) and 130°C (403 K) and the hydrogen+methane binary at 80°C (353 K). All measurements were performed with a total mixture pressure of 3.45 MPa. The experimental results are compared with predictions from the Redlich-Kwong, Peng-Robinson, and extended corresponding-states models. 相似文献
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介绍了气体分离膜的基本原理及在炼厂、化工厂尾气中回收氢气的应用.列举了我国石化企业应用的实例,并提出进一步推广应用的建议. 相似文献