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Comparative study on pressure swing adsorption system for industrial hydrogen and fuel cell hydrogen

Chinese Journal of Chemical Engineering 2022年第2期35卷 112-119页

作者： Jian Chen Lingbing Bu Yingqi Luo Southwest Institute of Chemical Co. Ltd.Chengdu 610225China

In order to improve the design of PSA system for fuel cell hydrogen production,a non-isothermal model of eight-bed PSA hydrogen process with five-component(H_(2)/N_(2)/CH_(4)/CO/CO_(2)=74.59%/0.01%/4.2%/2.5%/18.7%(vol))four-stage pressure equalization was developed in this *** model adopts a composite adsorption bed of activated carbon and zeolite 5 *** this article,pressure variation,temperature field and separation performance are stimulated,and also effect of providing purge(PP)differential pressure and the ratio of activated carbon to zeolite 5 A on separation performance in the process of producing industrial hydrogen(CO content in hydrogen is 10μl·L^(-1))and fuel cell hydrogen(CO content is 0.2μl·L^(-1))are *** results show that Run 3,when the CO content in hydrogen is 10μl·L^(-1),the hydrogen recovery is 89.8%,and the average flow rate of feed gas is 0.529 mol·s^(-1);When the CO content in hydrogen is 0.2μl·L^(-1),the hydrogen recovery is 85.2%,and the average flow rate of feed gas is 0.43 mol·s^(-1).With the increase of PP differential pressure,hydrogen recovery first increases and then decreases,reaching the maximum when PP differential pressure is 0.263 MPa;With the decrease of the ratio of activated carbon to zeolite 5 A,the hydrogen recovery increases *** the CO content in hydrogen is 0.2μl·L^(-1) the hydrogen recovery increases more obviously,from 83.96%to 86.37%,until the ratio of activated carbon to zeolite 5 A decreases to *** the end of PP step,no large amount of CO_(2) in gas or solid phase enters the zeolite 5 A adsorption bed,while when the CO content in hydrogen is 10μl·L^(-1),and the ratio of carbon to zeolite 5 A is less than 1.4,more CO_(2) will enter the zeolite 5 A bed.

关键词： pressure swing adsorption Hydrogen Fuel cell hydrogen Industrial hydrogen Numerical simulation

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Hydrogen Purification Performance of pressure swing adsorption Based on Cu-BTC/zeolite 5A Layered Bed

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Journal of Wuhan University of Technology(Materials Science) 2022年第5期37卷 815-822页

作者： SUN Kang YANG Tianqi MA Shuo YE Feng XIAO Jinsheng Hubei Research Center for New Energy&Intelligent Connected Vehicle and Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive EngineeringWuhan University of TechnologyWuhan430070China Intelligent Manufacturing and Automobile School Chongqing College of Electronic EngineeringChongqing401331China School of Artificial Intelligence Jianghan UniversityWuhan430056China

A pressure swing adsorption (PSA) hydrogen purification model for the four-component gas (H_(2)/CO_(2)/CH_(4)/CO=73/16/8/3 mol%) in a layered bed packed with Cu-BTC and zeolite 5A was established to achieve better hydrogen purification *** comparing its simulation results with the experimental data,the adsorption isotherm model was validated and could be used to accurately describe the adsorption process of the gas mixture on the two *** breakthrough curves of the mixed gas on the layered bed were studied to verify the correctness of the established simulation *** on the validated model,the performance of the PSA system based on the layered bed was carried out,including the hydrogen purity and *** simulation results show that the hydrogen purification system based on the layered bed model can achieve hydrogen purity of 95.469% and hydrogen recovery of 83.219%.Moreover,a parametric study was carried out and its results show that reductions in feed flow rate and adsorption time result in an increase in hydrogen purity and a decrease in hydrogen recovery.A longer equalization time between the two adsorption beds can simultaneously increase the hydrogen purity and recovery.

关键词： hydrogen purification pressure swing adsorption layered bed Cu-BTC zeolite 5A

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Artificial neural network based optimization of a six-step two-bed pressure swing adsorption system for hydrogen purification

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Energy and AI 2021年第3期5卷 38-52页

作者： Liang Tong Pierre Bénard Yi Zong Richard Chahine Kun Liu Jinsheng Xiao Reliability Engineering Institute School of Energy and Power EngineeringWuhan University of TechnologyWuhanHubei 430063China Hubei Research Center for New Energy&Intelligent Connected Vehicle and Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive EngineeringWuhan University of TechnologyHubei 430070China Hydrogen Research Institute Universitédu QuébecàTrois-RivièresQuebec G8Z 4M3Canada Center for Electric Power and Energy Department of Electrical EngineeringTechnical University of Denmark4000RoskildeDenmark Green Island Environment and Resources Institute School of Architectural and Civil EngineeringShenyang City UniversityLiaoning 110112China

The pressure swing adsorption(PSA)system is widely applied to separate and purify hydrogen from gaseous *** extended Langmuir equation fitted from the extended Langmuir-Freundlich isotherm has been used to predict the adsorption isothermal of hydrogen and methane on the zeolite 5A adsorbent bed.A six-step two-bed PSA model for hydrogen purification is developed and validated by comparing its simulation results with other *** effects of the adsorption pressure,the P/F ratio,the adsorption step time and the pressure equalization time on the performance of the hydrogen purification system are studied.A four-step two-bed PSA model is taken into consideration,and the six-step PSA system shows higher about 13%hydrogen recovery than the four-step PSA *** performance of the vacuum pressure swing adsorption(VPSA)system is compared with that of the PSA system,the VPSA system shows higher hydrogen purity than the PSA *** on the validated PSA model,a dataset has been produced to train the artificial neural network(ANN)*** effects of the number of neurons in the hidden layer and the number of samples used for training ANN model on the predicted performance of ANN model are ***,the well-trained ANN model with 6 neurons in the hidden layer is applied to predict the performance of the PSA system for hydrogen ***-objective optimization of hydrogen purification system is performed based on the trained ANN *** artificial neural network can be considered as a very effective method for predicting and optimizing the performance of the PSA system for hydrogen purification.

关键词： Hydrogen purification pressure swing adsorption Isotherm Artificial neural network Machine learning Optimization

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Progress in pressure swing adsorption Models During the Recent 30 Years

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Chinese Journal of Chemical Engineering 2002年第2期10卷 228-235页

作者：曾嵘关建郁 Research Institute of Chemical Engineering South China University of Technology Guangzhou 510640 China

The pressure swing adsorption (PSA) models discussed here are divided into three categories: partialdifferential equation model, electrical analogue model and neural network model. The partial differential equationmodel, including equilibrium and kinetic models, has provided an elementary viewpoint for PSA processes. Usingthe simplest equilibrium models, some influential factors, such as pressurization with product, incomplete purge,beds with dead volume and heat effects, are discussed respectively. With several approximate assumptions i.e.,concentration profile in adsorbent, 'frozen' column, symmetry and heat effects of bed wall, the more complexkinetic models can be simplified to a certain degree at the expense of a limited application. It has also been foundthat the electrical analogue model has great flexibility to handle more realistic PSA processes without any additionalhypothesis.

关键词： gas separation pressure swing adsorption mathematical model

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Analysis of CO<sub>2</sub>pressure swing adsorption Simulation by Considering the Transport Phenomena in the Adsorber

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Journal of Materials Science and Chemical Engineering 2021年第3期9卷 39-54页

作者： Takehiro Esaki Hideaki Kuronuma Noriyuki Kobayashi Department of Chemical Engineering Faculty of Engineering Fukuoka University Fukuoka Japan Chemical systems engineering Graduate School of Engineering Nagoya University Aichi Japan

This study focused on CO2 separation technology with adsorption. This paper describes the analysis carried out by a CO2 pressure swing adsorption simulation to scale up the absorber. An unsteady one-dimensional balance model was constructed by considering the material, energy, and momentum. In the CO2 breakthrough test, the beginning time and CO2 concentration at outlet of CO2 breakthrough in the calculation were almost equivalent to that of experiment results. The correlation consistency of the calculation results with the analysis model and the experimental results obtained by a bench scale experiment was evaluated. The transport phenomena in the adsorber were investigated at the adsorption, rinse, and desorption steps according to the calculation results. The starting time of CO2 breakthrough obtained by the analysis is equal to that obtained by the adsorption breakthrough experiment. This confirms that the CO2 adsorption, and the temperature and velocity distribution in the adsorber, change as a function of the adsorption, rinse, and desorption steps, respectively. Additionally, the CO2 concentration of the captured gas and the amount of CO2 quantity were 93.4% per day and 2.9 ton/day, respectively. These values are equal to those obtained by the bench scale experiment.

关键词： Carbon Dioxide Separation pressure swing adsorption Numerical Analysis

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Study on pressure swing adsorption Removing C_(2)^(+) from Natural Gas as Raw Material for Thermal Chlorination

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Journal of Natural Gas Chemistry 2004年第1期13卷 53-57页

作者： SulanXia JiahuaZhu XiaobinZeng ZhaohuaFeng XinyuCheng SchoolofChemicalEngineering，SichuanUniversity Chengdu610065，China HongheChemicalINC Zigong643000，China

The experimental investigation demonstrates that a satisfactory result can be expected for pressure swing adsorption (PSA) purification of natural gas as raw material for thermal chlorination process. Using hh-4 molecular sieve as adsorbent for removing C+2 components, the suitable adsorption pressure is 0.4-0.45 MPa, desorption vacuum is 0.08-0.09 MPa and circulation time is 20-21 min.

关键词： chloride methane natural gas purification pressure swing adsorption

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Pilot-scale Experiment for Purification of CO from Industrial Tail Gases by pressure swing adsorption

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Chinese Journal of Chemical Engineering 2008年第5期16卷 715-721页

作者：陈玉保宁平谢有畅陈云华孙暠刘志云 Department of Energy and Environmental Science Yunnan Normal University Kunming 650092 China Department of Environmental Science and Engineering Kunming University of Science and Technology Kunming 650093 China Department of Chemistry and Molecular Engineering Peking University Beijing 100871 China Yunnan Jiehua Chemistry Group Co. Ltd Kaiyuan 661600 China

Using pressure swing adsorption （PSA） technology to purify carbon monoxide （CO） discharged from industrial gases is a high-efficiency and economical method. In this article, a four-bed PSA experiment for CO purification was improved and optimized, in which a set of 120 m^3·h^-1 pilot-scale PSA device was developed to purify CO from industrial tail gases, a set of control systems suitable for industry production was developed, and the influences of the operating parameters on CO purification were investigated. The experimental results indicated that the pilot-scale PSA device could produce qualified product gas and get high CO recovery ratio under optimized conditions. The research may provide reliable fundamental data, for industrial scale utilization of CO, from industrial tail gases, and have strong market competitive power and a broad promoted application prospect.

关键词： pressure swing adsorption purification separation carbon monoxide

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Carbon Dioxide/Methane Separation by adsorption on Sepiolite

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Journal of Natural Gas Chemistry 2007年第3期16卷 235-243页

作者： José A.Delgado María A.Uguina José L.Sotelo Beatriz Ruíz Marcio Rosário Department of Chemical Engineering Universidad Complutense de Madrid28040Madrid.Spain

In this work, the use of sepiolite for the removal of carbon dioxide from a carbon dioxide/methane mixture by a pressure swing adsorption （PSA） process has been researched. adsorption equilibrium and kinetics have been measured in a fixed-bed, and the adsorption equilibrium parameters of carbon dioxide and methane on sepiolite have been obtained. A model based on the LDF approximation has been employed to simulate the fixed-bed kinetics, using the Langmuir equation to describe the adsorption equilibrium isotherm. The functioning of a PSA cycle for separating carbon dioxide/methane mixtures using sepiolite as adsorbent has also been studied. The experimental results were compared with the ones predicted by the model adapted to a PSA system. Methane with purity higher than 97% can be obtained from feeds containing carbon dioxide with concentrations ranging from 34% to 56% with the proposed PSA cycle. These results suggest that sepiolite is an adsorbent with good properties for its employment in a PSA cycle for carbon dioxide removal from landfill gases.

关键词： carbon dioxide methane sepiolite adsorption fixed-bed pressure swing adsorption

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Simulation and experiment of six-bed PSA process for air separation with rotating distribution valve

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Chinese Journal of Chemical Engineering 2022年第2期35卷 329-337页

作者： Tao Tian Yayan Wang Bing Liu Zhaoyang Ding Xinxi Xu Meisheng Shi Jun Ma Yanjun Zhang Donghui Zhang Institute of Medical Support Technology Academy of System Engineering of Academy of Military Science of Chinese PLATianjin 300161China School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

In this work,a six-bed pressure swing adsorption(PSA)process was investigated to produce medical oxygen from air,which uses the combination of six-way rotating distribution valve and PSA and has the main advantage of effectively saving space compared to the traditional two-bed or four-bed PSA process and can obtain greater *** mathematical model of adsorption beds was developed based on the separation mechanism and the interaction among different ***,a pilot-scale device has been constructed to verify the accuracy of mathematical model by *** oxygen product conformed to the medical standard(>93%(vol))with a recovery of over 57%.Some related parameters were also discussed in detail,such as step time,ratio of length to the diameter,flow rate of product.

关键词： pressure swing adsorption Air separation Mathematical modeling Rotating distribution valve

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Fundamentals and developments of compressed biogas in city gas distribution network in India:A review

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Petroleum Research 2022年第3期7卷 409-418页

作者： Kriti Yadav Anirbid Sircar Centre of Excellence for Geothermal Energy Pandit Deendayal Petroleum UniversityGandhinagarGujaratIndia

Biogas is a significant renewable source as well as an alternative energy carrier provided by Anaerobic Digestion(AD)of biodegradable food wastes and other organic *** paper describes some major facts about biogas along with the barriers and adaptation of CBG in society,it also narrates the types of feedstocks available for biogas generation and what are the major sources in *** this study,different stages of anaerobic digestion are discussed such as hydrolysis,acidogenesis,acetogenesis and methanogenesis for biogas *** its purification,the biogas can be used as a fuel for domestic as well as transportation purposes.A glimpse of biogas like purification techniques like biological desulphurization,iron chloride dosing,pressure swing adsorption,chemical scrubbing and water scrubbing is given,the major additions of national policy of biofuels in 2018 is also *** has been found that in India,majorly pressure swing adsorption and water scrubbing methods are used for biogas purification,currently,the country has 12 commercial CBG plants with a total CBG output capacity of 18,461.7 tonnes per year,which is just 0.06 percent of the total *** details of the plants along with their CBG production capacity are described,and sustainable alternative towards affordable transportation(SATAT)launched by MoPNG is introduced in this study,furthermore,the features and types of models suggested by Ministry of Petroleum and Natural Gas(MoPNG)to introduce compressed biogas(CBG)in city gas distribution(CGD)network are discussed.

关键词： Compressed biogas Anaerobic digestion City gas distribution Water scrubbing pressure swing adsorption

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