共查询到18条相似文献,搜索用时 109 毫秒
1.
2.
酸性侵蚀性气体分离膜材料研究及应用进展 总被引:1,自引:1,他引:0
综述了CO2、H2S、SO2、Cl2及HCl等酸性侵蚀性气体分离膜材料的最新研究与应用进展,讨论了这类气体膜分离工艺对膜材料的要求,介绍了聚酰亚胺(PI)、聚二甲基硅氧烷(PDMS)、聚四氟乙烯(PTFE)、碳分子筛(CMS)等几种耐蚀分离膜材料的特征结构、特点、适用的气体分离类型及相应的分离机理。 相似文献
3.
玻璃膜用于气体分离的研究 总被引:6,自引:0,他引:6
本文介绍了分离气体的玻璃膜的制备工艺和特性,采用二种工艺制备了玻璃分离膜;多孔玻璃毛细管膜和沸石一多孔玻璃(陶瓷)复合膜。初步探讨了孔径分布,气体温度,后处理等对多孔玻璃膜和复合膜气体透过率和气体分离率的影响,结果表明,所制备的多孔玻璃膜的孔径在2nm以下时,分离膜具有较高的分离能力,复合膜可通过SiCL4再涂膜处理提高其气体分离率。 相似文献
4.
5.
6.
7.
炭分子筛膜研究的新进展 总被引:3,自引:0,他引:3
炭分子筛膜是一种用于气体分离的高效,节能的新型材料,具有好的气体分离选择性,高的热和化学稳定性,近年来得到国内外广泛的重视和发展,本文从制备炭分子筛膜的原料,制备工艺及其在气体分离应用等方面综合了国内外近年来炭分子筛膜的研究进展,并指出了目前存在的问题。 相似文献
8.
针对碳分子筛对氮气/甲烷分离体系分离比低的问题,采用浸渍法以市售空分碳分子筛(CMS)为基体,制备了分离氮气/甲烷的铁离子改性碳分子筛。通过静态吸附量、分离比、吸附动力学及热力学性质考察了铁离子负载量对碳分子筛吸附分离氮气/甲烷性能的影响。结果表明:铁(Ⅲ)的负载减小了CMS的比表面积、微孔体积和孔径,使CMS超微孔的孔径分布呈现更集中的趋势。这种集中性以动力学性能下降为代价,明显提高了碳分子筛对氮气/甲烷的吸附分离比。在303 K、0.7 MPa条件下,综合性能优异的0.3%铁改性CMS具有6.03的氮气/甲烷吸附分离比。 相似文献
9.
10.
陶瓷分离膜的制备工艺进展及市场应用 总被引:4,自引:0,他引:4
本文简要叙述了陶瓷发离膜制备工艺进展,目前发展现状及陶瓷分离在微滤、超滤及气体分离等领域中的市场应用,展望了今后陶瓷分离膜制备技术及市场应用发展趋势。 相似文献
11.
12.
The membranes were prepared by the incorporation of highly hydrophobic silicalite and carbon molecular sieves (CMS) from different precursors into the PDMS casting solutions. The pervaporative removal of VOCs, such as benzene, from aqueous solutions was carried out using the separation factor and permeation flux as the evaluating parameters. The effects of the CMS types and structures, feed concentrations on the pervaporation performance were preliminarily investigated. 相似文献
13.
14.
碳沉积法制富氮用炭分子筛的研究 总被引:1,自引:0,他引:1
本文提出的碳沉积法是用煤焦油馏分油的有机溶液浸渍煤炭化物,然后热解以进行“孔调变”。确定了最佳工艺条件,制得富氮性能良好的炭分子筛。并用D-A方程求取了各种样品的微孔结构参数。 相似文献
15.
《Gas Separation & Purification》1993,7(4):247-251
The development and commercialization of carbon molecular sieves (CMS) are closely connected with the development of pressure swing adsorption (PSA) processes for the separation of gases. It was already known in the 1960s that certain carbonaceous materials have a molecular sieving effect similar to that of the well known zeolitic molecular sieves. The effect was observed during basic research on anthracite and bituminous coal which are both known to be porous. However, the separation effect, e.g. for oxygen/nitrogen, was very small. It was not until the 1970s that large-scale production of uniform quality CMS suitable for commercial application in PSA processes was established. Nowadays, different types of CMS are successfully used in PSA plants, e.g. for the generation of nitrogen from air, for the production of methane from biogases, and for the recovery of hydrogen from coke oven and steam reforming gases1–4. 相似文献
16.
褐煤两步炭化法制炭分子筛 总被引:2,自引:0,他引:2
本文针对高挥发分的褐煤原料,提出两步炭化法制炭分子筛概念,并考察了工艺条件和产品空分性能。结果表明,与一步法相比,两步炭化法制炭分子筛具有易成型、粘结剂用量少,炭分子筛强度高和空分性能好等优点。 相似文献
17.
粘结剂对不粘煤制炭分子筛的影响 总被引:1,自引:0,他引:1
研究以不粘煤为原料,以煤焦油、R-树脂以及它们的混合物为粘结剂和调孔剂,制备空分用炭分子筛的工艺方法,考察了粘结剂种类和配比对炭分子筛空分性能的影响。结果表明,R-树脂的引入改进了工艺条件和炭分子筛性能。适宜的R-树脂/煤焦油/不粘煤配比为5/20/100。 相似文献
18.
Carbon molecular sieves are adsorbents for gas separation processes of increasing importance. A variety of carbonaceous adsorbents, activated carbons and improved carbon molecular sieves, all with different pore size distributions, can be produced, systematically, by using different steps in the manufacturing process. The two types of carbon molecular sieves, CMSN2 and CMSH2, carefully developed by Bergbau-Forschung GmbH, can be distinguished by different separation mechanisms. The procedure of manufacturing the carbon molecular sieves type CMSN2 and type CMSH2 and their application in an air separating process for nitrogen recovery and hydrogen or nobel gas recovery processes, respectively, using different feed gases, is discussed. 相似文献