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介绍了采用变压吸附─低温分离联合法从合成氨弛放气制取氢气的工艺流程及特点,制得氢气纯度>99.9%,回收率可提高到95%以上,纯氢产量约为313、8m3/h。 相似文献
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变压吸附——低温分离联合法制氢技术的应用 总被引:1,自引:0,他引:1
介绍了采用变压吸附-低温分离联合法从合成氨弛放气制取氢气的工艺流程及特点,制得氢气纯度〉99.9%,回收率可提高到95%以上,纯氢产量约为313.8m^3/h。 相似文献
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《化学反应工程与工艺》2006,22(4):323-323
日本Ultrasound Brewery公司开发了一种从酒精稀溶液中分离乙醇和水的工艺,不采用传统的蒸发或蒸馏方法,乙醇纯度达99.5%。该公司在中试装置中验证了该方法,以10%~15%的酒精溶液为原料,可生产99.5%的乙醇600-700L/d。该技术将超声波与沸石吸附结合起来,其能耗约为蒸馏法的1/8,因此乙醇提纯的总成本预计是蒸馏法的1/3。 相似文献
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二氧化硅无机复合膜制备与分离氢气研究 总被引:1,自引:0,他引:1
以γ—Al2O3修饰过表面的陶瓷管载体和纳米粒子级SiO2溶胶为原材料,采用溶胶—凝胶法制备二氧化硅无机复合膜,可从工厂废气中回收99.95%以上的高纯度氢气。采用简化的非线性方程组对管壳式二氧化硅天机复合膜分离器逆流操作进行模拟物料衡算,计算值与实油值基本吻合。 相似文献
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为有效利用吉林石化炼油厂催化干气,对现有的制氢技术进行了研究,确定了采用膜分离-变压吸附集成工艺技术进行干气回收制H2,使H2回收率>80%,回收H2浓度>95mol%。 相似文献
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多晶硅尾气回收吸附塔再生气回收分析 总被引:1,自引:1,他引:0
多晶硅尾气回收中吸附塔再生气的主要成分为氢气,回收利用价值较高。阐述了多晶硅尾气回收吸附塔再生气冷凝气相回收利用的过程。分析发现吸附塔反吹气,经三级冷却将反吹气中的HCl、氯硅烷,进行分离回收,所得气相氢气回收再利用,造成回收氢气中的甲烷、氮气含量随时间变化累计增加。再生分离所得气相部分需要经过再处理才可进行回收利用。 相似文献
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回收氢气装置是利用经过脱硫处理后的芳烃厂富氢干气,采用国内成熟的变压吸附专利技术回收干干气气中氢气。利用高压吸附,低压抽真空解吸的原理,从含粗氢的干气中提纯出99.9%(v)的产品氢,提供芳烃装置用氢。同时变压吸附的尾气通过尾气压缩机增压后供芳烃装置做加热炉燃料,从而达到厂内富氢干气综合利用的目的,提高装置综合经济效益。 相似文献
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The hydrogen adsorption on Pt-Rh alloys in sulfuric acid aqueous solutions was studied by the method of cathode pulses. Hydrogen adsorption on the electrode with all ratio of alloy components (ωRh = 0-100%) is well described by the Temkin logarithmic isotherm. The surface coverage by adsorbed hydrogen at the same potential is decreased with increasing content of rhodium in the system. A linear dependence of adsorption peak potential on the alloy compositions in the case of weakly bonded adsorbed hydrogen is established. Hydrogen adsorption heat as a function of surface coverage for Pt-Rh-electrodes was obtained. The shape of the current-potential curve and position of the weakly bonded hydrogen adsorption on the potential scale are all related to alloy compositions, thus can serve as the basis for the determination surface composition of allovs. 相似文献
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氰化氢(HCN)是一种危害人体健康和大气环境的剧毒污染物,任何含氮物质和含氮燃料的燃烧、化工生产、冶金、汽车尾气排放等都能释放含HCN的废气。本文综述了近年来脱除HCN方面的研究进展,评述了各种脱氰方法包括吸收、吸附、燃烧、催化氧化、催化水解等技术的原理、适用对象及各种方法的优缺点。结果表明:吸收和燃烧法具有净化效率高、工艺简单等优点,对处理高浓度含氰废气有较大优势;其它方法的脱氰剂虽起活温度高、再生较为困难,但二次污染小,适用于气体的精细脱氰。今后各种技术的联合应用不仅能实现复杂气分下工业废气中HCN的逐级净化,而且能综合回收利用尾气中高浓度CO作为燃料和化工原料气。虽然各技术的联合应用在投资成本和工艺控制方面还有一定难度,但却具有较大的发展前景,是今后含氰化氢废气脱除的新趋势。 相似文献
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Reversible reactions (A + B = C + D) can be performed to near completion using an admixture of catalyst and sorbent that will selectively adsorb one of the reaction products. For an initially clean sorbent and a favorable adsorption isotherm and a long reactor, the adsorbed product, C, will propagate as a sharp, shock‐like front. While the adsorbed product will not move faster than this front, the second, nonadsorbed product, D, will, in principle, leave the reactor, uncontaminated. However, a parametric analysis of the two examples presented in this work, the water gas shift and the cracking of hydrogen sulfide, reveals an unexpectedly complex behavior. While assuming adsorption equilibrium the effect of the equilibrium constant, the reaction kinetics and adsorption isotherm on the reactant and product concentration profiles are simulated. It is found that desired behavior is favored by large equilibrium constants, rapid kinetics, and strong nonlinear adsorption. © 2017 American Institute of Chemical Engineers AIChE J, 63: 5452–5461, 2017 相似文献