Numerical simulation of vacuum pressure swing adsorption for biogas upgrading

doi:10.3969/j.issn.0438-1157.2013.04.025

CIESC Journal ›› 2013, Vol. 64 ›› Issue (4): 1300-1305.DOI: 10.3969/j.issn.0438-1157.2013.04.025

Previous Articles Next Articles

Numerical simulation of vacuum pressure swing adsorption for biogas upgrading

ZHANG Shi¹, CHEN Wenliang¹, LI Hui², ZHANG Yabing², WEI Ping²

1. School of Automation & Electrical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China;
2. School of Biotechnology & Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China

Received:2012-07-19 Revised:2012-11-01 Online:2013-04-05 Published:2013-04-05
Supported by:
supported by the National Key Technology R&D Program(2011BAD15B02) and the High-tech Research and Development Program of China(2012AA021405).

真空变压吸附沼气净化过程的仿真研究

张湜¹, 陈文亮¹, 李晖², 张亚兵², 韦萍²

1. 南京工业大学自动化与电气工程学院,江苏南京 210009;
2. 南京工业大学生物与制药工程学院,江苏南京 210009

通讯作者: 李晖
作者简介:张湜(1952—),女,教授。
基金资助:
国家科技支撑计划项目(2011BAD15B02);国家高技术研究发展计划项目(2012AA021405);省科技支撑计划项目(BE2010359)。

Abstract

Abstract: Vacuum pressure swing adsorption(VPSA) is a technology for gas separation.There are some problems when it is applied to the process of biogas purification, among which is the concentration peak at the outlet of the column.To solve this problem, we use the linear driving force(LDF) model and Langmuir isothermal equilibrium to build a model and analyze the effect of CO₂ concentration in buffer tank on the purity of outlet of adsorption step.The results indicate that CO₂ enters the buffer tank in the second pressure equalization-depressurization and then the column in the first pressure equalization-pressurization, finally the concentration peak appears at the outlet of the column, and affects the CH₄ concentration.The simulation shows that in order to control the CO₂ concentration in buffer tank and improve the purity of the product, the adsorption time should be shorten as the adsorption pressure decreases.

Key words: linear driving force, vacuum pressure swing adsorption, biogas

摘要： 真空变压吸附(VPSA)是一种气体分离技术,该技术运用在沼气净化过程还存在较多的问题,针对该过程吸附塔出口浓度出现的浓度峰问题,运用线性推动力模型(LDF)与Langmuir等温方程对其建立了数学模型,模拟分析了缓冲罐中杂质浓度对吸附步骤出口浓度的影响。结果表明:相同吸附时间下,随着吸附压的降低,二均降结束时会有更多的杂质进入缓冲罐,而缓冲罐中的杂质又会通过一均升步骤进入吸附塔,最终使得吸附步骤出口浓度曲线出现波峰,从而影响了吸附塔出口CH₄含量。通过模型的分析,吸附时间随着吸附压不断降低而缩短,可以有效控制杂质进入缓冲罐,从而使吸附塔出口CH₄含量提高。

关键词: 线性推动力模型, 真空变压吸附, 沼气

CLC Number:

TQ028

ZHANG Shi, CHEN Wenliang, LI Hui, ZHANG Yabing, WEI Ping. Numerical simulation of vacuum pressure swing adsorption for biogas upgrading[J]. CIESC Journal, 2013, 64(4): 1300-1305.

张湜, 陈文亮, 李晖, 张亚兵, 韦萍. 真空变压吸附沼气净化过程的仿真研究[J]. 化工学报, 2013, 64(4): 1300-1305.

References 15

[1]	Yin Bing(尹冰), Chen Luming(陈路明), Kong Qingping(孔庆平).Research on purification technology for vehicle biogas[J].Modern Chemical Industry(现代化工), 2009, 29(11):28-33
[2]	Li Yan, Wei Miao, Jia Honghua.Aspen Plus simulation on high pressure water scrubbing absorber for biogas purifying[J].Renewable Energy Resources, 2011, 29(5):71-74
[3]	Jiang Hao(江皓), Wu Quangui(吴全贵), Zhou Hongjun(周红军).Biogas purification technology producing bio-methane and its applications[J].China Biogas(中国沼气), 2012, 30(2):6-11
[4]	Leinekugel-le-Cocq E, Tayakout-Fayolle M, Jallut C, et al.Approximation of a PSA process based on an equivalent continuous countercurrent flow process:blow-up and blow-down representation[J].Chemical Engineering Science, 2006, 61(2):633-651
[5]	Shen Chunzhi(沈春枝), Sun Yuzhu(孙玉柱), Li Ping(李平).Numerical simulation of vacuum pressure swing adsorption process for CO2 capture from flue gas[J].Journal of East China University of Science and Technology :Natural Science Edition(华东理工大学学报:自然科学版),2011, 37(5):524-531
[6]	Cruz P, Santos J C, Magalhaes F D, et al.Simulation of separation processes using finite volume method[J].Computers & Chemical Engineering, 2005, 30(1):83-98
[7]	Delgado J A, Uguina M A, Sotelo J L, et al.Numerical simulation of a three-bed PSA cycle for the methane/nitrogen separation with silicalite[J].Separation and Purification Technology, 2011, 77(1):7-17
[8]	Mendes A M M, Costa C A V, Rodrigues A E.Oxygen separation from air by PSA:modelling and experimental results(Ⅰ):Isothermal operation[J].Separation and Purification Technology, 2001, 24:173-188
[9]	Lopes F V S, Grande C A, Rodrigues A E.Activated carbon for hydrogen purification by pressure swing adsorption:multicomponent breakthrough curves and PSA performance[J].Chemical Engineering Science, 2011, 66:303-317
[10]	Liu Z, Grande C A, Li P, et al.Multi-bed vacuum pressure swing adsorption for carbon dioxide capture from flue gas[J].Separation and Purification Technology, 2011, 81(3):307-317
[11]	Dai Xianzhi(戴先知), Liu Yingshu(刘应书).Pressure swing adsorption models and its application[J].Low Temperature and Specialty Gases(低温与特气), 2006, 24(1):36-42
[12]	Cui Hongshe(崔红社), Liu Yingshu(刘应书), Yue Kai(乐恺).Mathematical simulation of PSA processes of a special miniature oxygen concentrator for SARS patients:simulation result and analysis[J].Journal of University of Science and Technology Beijing(北京科技大学学报), 2004, 26(2):222-226
[13]	Tanczyk M, Warmuzinski K.Multicomponent pressure swing adsorption(Ⅰ):Modelling of large-scale BSA installations[J].Chemical Engineering and Processing, 1997, 36(2):89-99
[14]	Tanczyk M, Warmuzinski K.Multicomponent pressure swing adsorption(Ⅱ):Experimental verification of the model[J].Chemical Engineering and Processing, 1998, 37(4):301-315
[15]	Schiesser W E.The Numerical Methods of Lines:Integration of Partial Differential Equations[M].San Diego:Academic Press,1991

Numerical simulation of vacuum pressure swing adsorption for biogas upgrading

真空变压吸附沼气净化过程的仿真研究

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

References 15

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	Junpeng TIAN, Yuanhui SHEN, Donghui ZHANG, Zhongli TANG. Simulation and analysis of CH₄/N₂ separation by vacuum pressure swing adsorption with structured composite adsorption media [J]. CIESC Journal, 2021, 72(11): 5675-5685.
[2]	Yu WANG,Guangwei YU,Ruqing JIANG,Jiajia LIN,Yin WANG. Effect of particle size on phosphorus and heavy metals during the preparation of biochar from food waste biogas residue [J]. CIESC Journal, 2021, 72(10): 5344-5353.
[3]	Jiying WU, Yimin MA, Wensheng CAO. Performance of biogas engine driven air source heat pump system under variable conditions [J]. CIESC Journal, 2020, 71(8): 3789-3796.
[4]	Shuqi FANG, Xinyue ZHANG, Siqi LI, Donghao BAI, Jing BAI. Investigation on separation of CO₂ from biogas by hydrate method in impinging stream reactor [J]. CIESC Journal, 2020, 71(5): 2099-2108.
[5]	QU Donglei,YANG Ying,QIAN Zhiling,LI Ping,YU Jianguo. Intensification of low-grade methane enrichment in nitrogen mixture by CH₄/CO₂ displacement [J]. CIESC Journal, 2020, 71(12): 5599-5609.
[6]	TIAN Caixia, SHEN Yuanhui, ZHANG Donghui, GAN Hainan. Biogas upgrading by vacuum pressure swing adsorption process [J]. CIESC Journal, 2018, 69(2): 741-749.
[7]	ZHANG Dong, LI Jinping, ZHANG Han. All operation mathematical model and thermal performance analysis on combined heating power and biogas system [J]. CIESC Journal, 2017, 68(5): 1998-2008.
[8]	ZHOU Yan, SHEN Yuanhui, FU Qiang, ZHANG Donghui. Experiment, simulation and safety evaluation of vacuum pressure swing adsorption for CH₄/N₂/O₂ separation [J]. CIESC Journal, 2017, 68(2): 723-731.
[9]	GU Dongyan, JIA Honghua, WU Yuandong, ZHOU Jun, WU Xiayuan, ZHENG Tao, YONG Xiaoyu. Synchronously degradation of biogas slurry and triphenyltin chloride in microbial fuel cell [J]. CIESC Journal, 2016, 67(5): 2056-2063.
[10]	DING Jian, REN Jiajia, LI Zheng, YANG Zhuhong, LU Xiaohua. Process of two-stage absorption column to strengthen water scrubbing technology to purify biogas [J]. CIESC Journal, 2016, 67(10): 4203-4210.
[11]	HUANG Xiaomei, LIU Xiaohe, ZHANG Jing. Design and test of LNG air mixing device for biogas peak shaving [J]. CIESC Journal, 2015, 66(S2): 405-412.
[12]	PU Shaorui, QIAN Hongliang, MA Chunyan, LIU Chang, LU Xiaohua. Coupling between thermophilic fermentation of livestock manure and thermochemical treatment of straw [J]. CIESC Journal, 2015, 66(6): 2220-2226.
[13]	NIU Hongzhi, KONG Xiaoying, LI Lianhua, SUN Yongming, YUAN Zhenhong, WANG Yao, ZHOU Xianyou. Material and energy conversion efficiency of biogas preparation process by anaerobic fermentation [J]. CIESC Journal, 2015, 66(2): 723-729.
[14]	ZHANG Shaopeng, HAN Ruiping, CHEN Jingjing, ZHOU Jun, LU Xiaohua, WANG Changsong. Analysis of heat transfer efficiency and rate inside fermentation tank with heating coil of biogas projects [J]. CIESC Journal, 2015, 66(11): 4304-4311.
[15]	WU Jiying, MA Yimin. System configuration and experimental study on LFG based biogas engine driven heat pump [J]. CIESC Journal, 2014, 65(z2): 208-214.