Gas Separation & Purification最新文献_第10页

On degradation of chemical solvents for bulk removal of CO2 化学溶剂的降解及其对CO2的大量去除

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80018-9

S.D. Daptardar, V.V. Mahajani, S.J. Chopra , P.K. Sen , S. Sridhar

引用次数: 6

Ternary desorption and displacement kinetics of gases in activated carbon 活性炭中气体的三元解吸和置换动力学

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80029-4

Xijun Hu, Bradley King, Duong D. Do

引用次数: 13

The modelling of fluid-flow distributions in annular packed beds 环空充填床中流体流动分布的模拟

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80006-5

Peter J. Heggs, David I. Ellis, Mohammed S. Ismail

引用次数: 18

Steady-state rate-based modelling for CO2/amine absorption—desorption systems 二氧化碳/胺吸收-解吸系统的稳态速率模型

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)85002-X

I. Alatiqi, M.F. Sabri, W. Bouhamra, E. Alper

{"title":"Steady-state rate-based modelling for CO2/amine absorption—desorption systems","authors":"I. Alatiqi, M.F. Sabri, W. Bouhamra, E. Alper","doi":"10.1016/0950-4214(94)85002-X","DOIUrl":"10.1016/0950-4214(94)85002-X","url":null,"abstract":"<div>A rigorous rate-based steady-state model of an absorber/desorber unit for the removal of CO2 by amine solutions was developed. The model, which essentially contains no empirically assigned parameters, is based on a ‘mixing cell’ approach and considers both interphase heat and mass transfer along with simultaneous chemical reaction rates. This deterministic model, which simulates tray and packed columns at steady state, has been validated using the data of two commercial monoethanolamine (MEA) plants. For tray columns, each tray was considered to be a mixing cell, while for packed columns, the required dispersion was provided by choosing a finite number of mixing cells. For a specified CO2 slippage rate, the effects of certain operating parameters, such as type and total concentration of amine employed, flow rate and composition of entering gas, on solution circulation rate and reboiler duty can be conveniently predicted.The computer program, written in basic language, is designed in a user-friendly form and is a menu-driven interactive simulator. The mathematical model consists of non-linear algebraic equations and can be operated on a PC. A typical running time on an IBM PS/2 with 25 MHz was 4.39 s for the absorber and 1.1 s for the desorber.</div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 1","pages":"Pages 3-11"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)85002-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88044401","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: 25

Carbon membranes for gas separation: Developmental studies 气体分离用碳膜:发展研究

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80024-3

A.S. Damle , S.K. Gangwal, V.K. Venkataraman

引用次数: 21

Argon production from air distillation: Use of a heat pump in a ternary distillation with a side rectifier 空气蒸馏制氩:在带侧整流器的三元蒸馏中使用热泵

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)85006-2

R. Agrawal, D.W. Woodward, T.F. Yee

{"title":"Argon production from air distillation: Use of a heat pump in a ternary distillation with a side rectifier","authors":"R. Agrawal, D.W. Woodward, T.F. Yee","doi":"10.1016/0950-4214(94)85006-2","DOIUrl":"10.1016/0950-4214(94)85006-2","url":null,"abstract":"<div>A ternary feed mixture ABC can be separated into individual components through the use of a main distillation column with a thermally linked side rectifier. To enhance such a separation, a heat pump can be implemented to transfer heat from the condenser at the top of the side rectifier to the reboiler at the bottom of the main column. In this paper, one such heat pump is described and applied to an air distillation system separating the ternary mixture containing nitrogen, oxygen and argon. The separation is performed by a conventional double column with a crude argon side column. When this system is operated at an elevated pressure to obtain higher product pressures, the separation of oxygen and argon becomes very difficult and leads to reduced argon recovery. The proposed heat pump enhances the separation by providing a supplementary crude argon condensing duty through the vaporization of a liquid oxygen stream from the bottom of the low pressure (LP) column. This scheme improves the liquid/vapour ratio (L/V) in the bottom section of the LP column and, more importantly, increases the vapour feed to the crude argon column. This increased feed rate leads to a substantial increase in argon recovery for the elevated pressure air distillation process.</div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 1","pages":"Pages 37-43"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)85006-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76612647","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: 9

Concerning: ‘CO2/N2 separation by PSA using metal-incorporated crystals’ 有关:“利用金属结合晶体的PSA法分离CO2/N2”

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)85008-9

D.M. Ruthven

引用次数: 1

Characterization of the permeation properties of CO2N2 gas mixtures in silicone rubber membranes CO2N2混合气体在硅橡胶膜中的渗透性能表征

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)85005-4

Hisham M. Ettouney, Ghazi Al-Enezi, S.E.M. Hamam , R. Hughes

{"title":"Characterization of the permeation properties of CO2N2 gas mixtures in silicone rubber membranes","authors":"Hisham M. Ettouney, Ghazi Al-Enezi, S.E.M. Hamam , R. Hughes","doi":"10.1016/0950-4214(94)85005-4","DOIUrl":"10.1016/0950-4214(94)85005-4","url":null,"abstract":"<div>The separation characteristics of silicone rubber membranes are determined for CO2N2 gas mixtures. The analysis is performed as a function of composition, flow rate and pressure of the feed gas. Results are presented in terms of the variation in component permeability and separation factor as a function of the above parameters. Component permeabilities are calculated using the complete mixing model. Data analysis over the studied pressure range shows that the permeability coefficient of pure CO2 gas in silicone rubber is 15 times higher than that of pure N2 gas. This behaviour is completely altered for a mixture of the gases, where the calculated separation factors at low feed pressures and low CO2 mole fractions in the feed stream are two- to three-fold lower than the separation factors for the pure gases. At higher feed pressures and high CO2 mole fractions in the feed stream, the above behaviour is reversed; the separation factors for the gas mixture are now higher than those for the pure gases. Comparison of the permeation characteristics of silicone rubber and cellulose acetate membranes for CO2N2 gas mixtures shows similar ranges and values for the gas permeabilities and separation factors. However, much higher separation factors are obtained for the cellulose acetate membrane in the case of pure gas permeation.</div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 1","pages":"Pages 31-36"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)85005-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77219076","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: 10

Development of carbonaceous adsorbents from coal reject for acidic gases removal 煤渣中碳质吸附剂的研制及其对酸性气体的脱除

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)85004-6

G.Q. Lu , D.D. Do

{"title":"Development of carbonaceous adsorbents from coal reject for acidic gases removal","authors":"G.Q. Lu , D.D. Do","doi":"10.1016/0950-4214(94)85004-6","DOIUrl":"10.1016/0950-4214(94)85004-6","url":null,"abstract":"<div>Studies on the preparation of carbonaceous sorbents from coal reject, a waste material generated in coal preparation processes, by pyrolysis and activation, and their applications to acidic gases removal are reviewed. The kinetics of coal reject pyrolysis and structural changes of coal reject as well as activation of coal reject chars are studied by both experiment and modelling. It is demonstrated that coal reject can be converted to effective adsorbents for NOx and SO2 removal. A two-consecutive-reaction model developed in this work can well describe the pyrolysis kinetics and confirm the softening effect on pore structure development during carbonization of coal reject. Structure-based kinetic models for the activation reactions are developed and validated by experimental data. Experimental and modelling studies of adsorption and reaction of sulfur dioxide on activated coal reject char are summarized. A macropore and surface diffusion model is successfully used to describe and predict the dynamic adsorption and desorption behaviour of SO2 on coal reject-derived adsorbent. It is found that sorption of SO2 in the presence of water vapour and oxygen enhances the capacity owing to sulfuric acid formation.</div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 1","pages":"Pages 17-29"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)85004-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79336093","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: 1

Removal of CO2 and/or SO2 from gas streams by a membrane absorption method 用膜吸收法从气流中去除CO2和/或SO2

Gas Separation & Purification Pub Date : 1994-01-01 DOI: 10.1016/0950-4214(94)80017-0

Susumu Nii, Hiroshi Takeuchi

{"title":"Removal of CO2 and/or SO2 from gas streams by a membrane absorption method","authors":"Susumu Nii, Hiroshi Takeuchi","doi":"10.1016/0950-4214(94)80017-0","DOIUrl":"10.1016/0950-4214(94)80017-0","url":null,"abstract":"<div>Studies were made on the membrane absorption of CO2 and/or SO2 using hydrophobic microporous hollow-fibre (HF) membrane modules. The absorbent liquids used were aqueous solutions of NaOH, K2CO3, alkanolamines and Na2SO3, flowing on the lumen side of the HF in laminar flow. A semi-empirical correlation was derived for the gas-phase mass-transfer coefficient on the shell side, by including geometrical factors of the HFs and the shell tube in the general correlation for mass transfer. It was found that the CO2 absorption rate in various aqueous solutions of alkalis and alkanolamines is successfully described by a model based on gas diffusion through the membrane pores subsequent to gas absorption accompanied by chemical reaction. The simultaneous membrane absorption of SO2 and CO2 was also studied using aqueous Na2SO3 solution, the selective removal of SO2 to CO2 being successfully achieved when both the liquid flow rate and solute concentration are low. This suggests that this membrane absorption method provides an energy saving process for SO2 removal from flue gases.</div>","PeriodicalId":12586,"journal":{"name":"Gas Separation & Purification","volume":"8 2","pages":"Pages 107-114"},"PeriodicalIF":0.0,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0950-4214(94)80017-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91425868","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: 84