Gas Separation & Purification最新文献

Single bed pressure swing adsorption process to generate high purity nitrogen 单床变压吸附工艺制备高纯氮气

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00010-2

A.I. LaCava, N.O. Lemcoff

引用次数: 6

Removal of VOCs from humidified gas streams using activated carbon cloth 使用活性炭布去除加湿气流中的挥发性有机化合物

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00004-7

Mark P. Cal , Mark J. Rood , Susan M. Larson

{"title":"Removal of VOCs from humidified gas streams using activated carbon cloth","authors":"Mark P. Cal , Mark J. Rood , Susan M. Larson","doi":"10.1016/0950-4214(96)00004-7","DOIUrl":"10.1016/0950-4214(96)00004-7","url":null,"abstract":"<div><p>This research investigates the effects of relative humidity (RH) on the adsorption of soluble (acetone) and insoluble (benzene) volatile organic compounds (VOCs) with activated carbon cloths (ACC). A gravimetric balance was used in conjunction with a gas chromatograph/mass spectrophotometer to determine the individual amounts of water and VOC adsorbed on an ACC sample. RH values from 0 to 90% and organic concentrations from 350 to 1000 ppmv were examined. The presence of water vapor in the gas-stream along with acetone (350 and 500 ppmv) had little effect on the adsorption capacity of acetone even at 90% RH. Water vapor in the gas stream had little effect on the adsorption capacity of benzene (500 ppmv) until about 65% RH, when a rapid decrease resulted in the adsorption capacity of benzene with increasing RH. This RH was also about where capillary condensation of water vapor occurs within ACC pores. Water vapor condenses within the ACC pores, making them unavailable for benzene adsorption. Increasing benzene concentration can have a significant effect on the amount of water vapor adsorbed. At 86% RH and 500 ppmv, 284 mg/g water was adsorbed, while at 86% RH and 1000 ppmv, only 165 mg/g water was adsorbed. Water vapor was more inhibitory for benzene adsorption as benzene concentration in the gas stream decreased.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"10 2","pages":"Pages 117-121"},"PeriodicalIF":0.0,"publicationDate":"1996-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(96)00004-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86563274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 123

Characterisation of sewage sludge-derived adsorbents for H2S removal. Part 2: Surface and pore structural evolution in chemical activation 污水污泥吸附剂去除H2S的特性研究。第二部分:化学活化过程中表面和孔隙结构的演化

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00011-4

G.Q.(Max) Lu , D.D. Lau

{"title":"Characterisation of sewage sludge-derived adsorbents for H2S removal. Part 2: Surface and pore structural evolution in chemical activation","authors":"G.Q.(Max) Lu , D.D. Lau","doi":"10.1016/0950-4214(96)00011-4","DOIUrl":"10.1016/0950-4214(96)00011-4","url":null,"abstract":"<div><p>This paper presents results of chemical activation of sewage sludge, a waste material generated in sewage treatment processes, to produce an adsorbent for H<sub>2</sub>S removal. Dewatered sewage sludge samples were subjected to chemical treatment by sulfuric acid and zinc chloride at various molar concentrations and were then pyrolysed in inert gas atmosphere at various temperatures for different hold times. Resulting adsorbents were characterised in terms of BET surface area, micropore area and pore size/volume distributions. In this study, it was shown that pyrolysis temperature and activation chemicals used significantly affect the surface area development and pore structure evolution. Solution molar concentration of the activating agent is a particularly important factor. H<sub>2</sub>S adsorption tests were carried out on the derived adsorbents using a thermogravimetric analyser. Experimental results demonstrate that sewage sludge, a waste material in abundant supply at virtually no cost, is a viable source of activated adsorbents. Its potential use for odour control is reinforced by the need to find environmentally safe disposal alternatives for sewage sludge. From both economics and environmental perspectives, these experimental results warrant further efforts, perhaps in terms of large scale manufacturing and testing.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"10 2","pages":"Pages 103-111"},"PeriodicalIF":0.0,"publicationDate":"1996-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(96)00011-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74946221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 76

Process effects on activated carbon performance and analytical methods used for low level mercury removal in natural gas applications 工艺对活性炭性能的影响及用于天然气中低水平除汞的分析方法

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00005-9

James D. Mcnamara, Norman J. Wagner

引用次数: 10

Carbon-based materials for gas separation, purification and clean up 用于气体分离、净化和清理的碳基材料

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00003-5

G.Q.(Max) Lu, Massoud Rostam-Abadi

引用次数: 2

Activated carbon cloth adsorption-cryogenic system to recover toxic volatile organic compounds 活性炭布吸附-深冷系统回收有毒挥发性有机化合物

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00008-4

Mehrdad Lordgooei, Kelly R. Carmichael, Terrance W. Kelly, Mark J. Rood, Susan M. Larson

{"title":"Activated carbon cloth adsorption-cryogenic system to recover toxic volatile organic compounds","authors":"Mehrdad Lordgooei, Kelly R. Carmichael, Terrance W. Kelly, Mark J. Rood, Susan M. Larson","doi":"10.1016/0950-4214(96)00008-4","DOIUrl":"10.1016/0950-4214(96)00008-4","url":null,"abstract":"<div><p>There is an emergent need to reduce the emissions of toxic volatile organic compounds (VOCs) to the atmosphere. One strategy to reduce the emissions of VOCs from point sources is to use air pollution control devices on the sources' discharge streams. This paper describes the development of a new activated carbon cloth (ACC) adsorption system that is integrated with cryogenic vapor recovery to reduce the amount of VOCs emitted to the atmosphere from point sources and provide for reuse of the VOCs that are recovered. Electrical current is used to regenerate the ACC. ACC adsorption followed by electrothermal regeneration results in formation of a concentrated organic vapor which is cryogenically condensed from the gas phase. Electrothermal desorption allows for careful control of the desorption time and the concentration profile of the desorbed VOC to allow minimal use of cryogen. Adsorption, followed by cryogenic treatment enables VOC sources to meet air quality control regulations while providing a high quality liquid VOC product for reuse.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"10 2","pages":"Pages 123-130"},"PeriodicalIF":0.0,"publicationDate":"1996-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(96)00008-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77340911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 47

Natural gas storage with activated carbon from a bituminous coal 用从烟煤中提取的活性炭储存天然气

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00009-6

Jian Sun , Mark J. Rood , Massoud Rostam-Abadi , Anthony A. Lizzio

{"title":"Natural gas storage with activated carbon from a bituminous coal","authors":"Jian Sun , Mark J. Rood , Massoud Rostam-Abadi , Anthony A. Lizzio","doi":"10.1016/0950-4214(96)00009-6","DOIUrl":"10.1016/0950-4214(96)00009-6","url":null,"abstract":"<div><p>Granular activated carbons (−20 + 100 mesh; 0.149−0.84 mm) were produced by physical activation and chemical activation with KOH from an Illinois bituminous coal (IBC-106) for natural gas storage. The products were characterized by BET surface area, micropore volume, bulk density, and methane adsorption capacities. Volumetric methane adsorption capacities (<span><math><mtext>V</mtext><msub><mi></mi><mn>m</mn></msub><mtext>V</mtext><msub><mi></mi><mn>s</mn></msub></math></span>) of some of the granular carbons produced by physical activation are about 70 cm<sup>3</sup>/cm<sup>3</sup> which is comparable to that of BPL, a commercial activated carbon. (<span><math><mtext>V</mtext><msub><mi></mi><mn>m</mn></msub><mtext>V</mtext><msub><mi></mi><mn>s</mn></msub></math></span>) values above 100 cm<sup>3</sup>/cm<sup>3</sup> are obtainable by grinding the granular products to −325 mesh (<0.044 mm). The increase in (<span><math><mtext>V</mtext><msub><mi></mi><mn>m</mn></msub><mtext>V</mtext><msub><mi></mi><mn>s</mn></msub></math></span>) is due to the increase in bulk density of the carbons. Volumetric methane adsorption capacity increases with increasing pore surface area and micropore volume when normalizing with respect to sample bulk volume. Compared with steam-activated carbons, granular carbons produced by KOH activation have higher micropore volume and higher methane adsorption capacities (g/g). Their volumetric methane adsorption capacities are lower due to their lower bulk densities.</p></div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"10 2","pages":"Pages 91-96"},"PeriodicalIF":0.0,"publicationDate":"1996-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(96)00009-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88640350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34

Fabrication of carbon fibre composites for gas separation 气体分离用碳纤维复合材料的制备

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00006-0

G.M. Kimber, M. Jagtoyen, Y.Q. Fei, F.J. Derbyshire

引用次数: 15

Applications for activated carbons from waste tires: natural gas storage and air pollution control 废轮胎活性炭的应用:天然气储存和空气污染控制

Gas Separation & Purification Pub Date : 1996-06-01 DOI: 10.1016/0950-4214(96)00007-2

T.A. Brady , M. Rostam-Abadi , M.J. Rood

引用次数: 70

A simple model for prediction of acid gas solubilities in alkanolamines 预测烷醇胺中酸性气体溶解度的简单模型

Gas Separation & Purification Pub Date : 1996-01-01 DOI: 10.1016/0950-4214(96)00019-9

Mark L. Posey, Kevin G. Tapperson, Gary T. Rochelle

引用次数: 61