Citation: GAO Shuai, ZHENG Qing-rong. Comparisons of adsorption models for methane adsorption equilibrium on activated carbon[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(3): 380-384. shu

Comparisons of adsorption models for methane adsorption equilibrium on activated carbon

GAO Shuai ,
ZHENG Qing-rong ^,

1.
Provincial Key Laboratory of Naval Architecture & Ocean Engineering, Institute of Marine Engineering, Jimei University, Xiamen 361021, China

Corresponding author: ZHENG Qing-rong,
Received Date: 30 August 2012
Available Online: 21 November 2012
Fund Project: 福建省自然科学基金(2011J01324) (2011J01324)福建省高等学校新世纪优秀人才计划支持计划(Z80136) (Z80136)福建省属高校专项课题(JK2010030)。 (JK2010030)

Comparisons of accuracies of adsorption models in predicting adsorption data of supercritical methane on activated carbon were carried out for practical application of adsorption of natural gas (ANG). Ajax activated carbon was selected as an adsorbent, six isotherms of excess adsorption amount of methane were measured at temperature from 268.15 K to 338.15 K and pressure up to 12.5 MPa. Parameters of Langmuir, Langmuir-Freundlich and Toth equations were firstly set by the linear fit of adsorption data, absolute amounts and densities of the adsorbed phase of supercritical methane were then determined by the modified models. Isosteric heats of methane adsorption on Ajax activated carbon were determined by adsorption isosteres on the absolute amounts. Comparisons were made between experimental data and those predicted by models. Results showed that the adsorbed phase densities of supercritical methane on the activated carbon varied with equilibrium temperatures and pressures, the mean value of isosteric heat of adsorption set by absolute amounts was 15.72 kJ/mol, which was smaller than that plotted from the excess amounts. The relative errors between the experimental data and those predicted by Langmuir, Langmuir-Freundlich and Toth equations varied with the pressure, The accumulated relative errors were respectively 6.449 8%, 7.918 4% and 0.910 0% at lower pressure range from 0 to 0.025 MPa, but will respectively be 0.491 1%, 0.161 3% and 0.369 4% while pressure was in range of 1～10 MPa. Toth equation performed well in predicting the equilibrium data in the whole pressure range, but the results from Langmuir-Freundlich equation had higher prediction accuracies while the pressure got higher.
- adsorption equilibrium,
- methane,
- activated carbon,
- model
1. [1]
  [1] 周理, 李明, 周亚平. 超临界甲烷在高比表面活性炭上的吸附测量及理论分析[J]. 中国科学(B辑), 2000, 30(1): 49-56. (ZHOU Li, LI Ming, ZHOU Ya-ping. Measurement and theoretical analysis of supercritical methane high specific surface area activated carbon adsorption[J]. Science in China (Series B), 2000, 30(1): 49-56.)
2. [2]
  [2] BIRKETT G, DO D D. New method to determine PSD using supercritical adsorption: Applied to methane adsorption in activated carbon[J]. Langmuir, 2006, 22(18): 7622-7630.
3. [3]
  [3] 郑青榕, 廖海峰, 解晨, 智会杰. 超临界甲烷在活性炭上的吸附平衡分析[J]. 燃料化学学报, 2012, 40(7): 892-896. (ZHENG Qing-rong, LIAO Hai-feng, JIE Chen, ZHI Hui-jie. Adsorption equilibrium of supercritical methane on activated carbon[J]. Journal of Fuel Chemistry and Technology, 2012, 40(7): 892-896.)
4. [4]
  [4] 孙艳. 多孔介质储气研究. 天津: 天津大学, 2007. (SUN Yan. Studies on gas storage in porous media. Tianjin: Tianjin University, 2007.)
5. [5]
  [5] DO D D, DO H D. Appropriate volumes for adsorption isotherm studies: The absolute void volume, accessible pore volume and enclosing particle volume[J]. Journal of Colloid and Interface Science, 2007, 316(2): 317-330.
6. [6]
  [6] OZAWA S, KUSUMI S, OGINO Y. Physical adsorption of gases at high pressure[J]. Journal of Colloid and Interface Science, 1976, 56(1): 83-91.
7. [7]
  [7] LI M, GU A Z, LU X S, WANG R S. Determination of the adsorbate density from supercritical gas adsorption equilibrium data[J]. Carbon, 2003, 41(3): 585-588.
8. [8]
  [8] PAGGIARO R, MICHL F, BE'NARD P. Cryo-adsorptive hydrogen storage on activated carbon. II: Investigation of the thermal effects during filling at cryogenic temperatures[J]. International Journal of Hydrogen Energy, 2010, 35(2): 648-659.
9. [9]
  [9] DO D D, DO H D. Adsorption of supercritical fluids in non-porous and porous carbons: Analysis of adsorbed phase volume and density[J]. Carbon, 2003, 41(9): 1777-1791.
10. [10]
  [10] 谢兰英, Lingai Luo, 李忠华. VOCs在MAC上吸附等温线的测定与拟合[J]. 化工学报, 2006, 57(6):1357-1362. (XIE Lan-ying, LUO Lingai, LI Zhong-hua. Measurement and simulation of adsorption isotherms of VOCs on MAC[J]. Journal of Chemical Industry and Engineering (China), 2006, 57(6): 1357-1362.)
11. [11]
  [10] SETZMANN U, WAGNER W J. A new EOS and tables of thermodynamic properties for methane covering the range from the melting line to 635K at pressures up to 1000MPa[J]. Journal of Physical and Chemical Reference Data, 1991, 20(6): 1061-1156.
12. [12]
  [12] 郑青榕, BIRKETTG, DO D D. 甲烷在活性炭上吸附的实验及理论分析[J]. 天然气化工,2009, 34(1):41-45. (ZHENG Qing-rong, BIRKETT G, DO D D. Theoretical and experimental analysis of methane adsorption on activated carbon[J]. Natural Gas Chemical Industry, 2009, 34(1): 41- 44.)
13. [13]
  [13] 李明, 顾安忠, 鲁雪生, 汪荣顺. 吸附势理论在甲烷临界温度以上吸附中的作用[J]. 天然气化工, 2003, 28(5): 28-31. (LI Ming, GU An-zhong, LU Xue-sheng, WANG Rong-shun. Study on methane adsorption above critical temperature by adsorption potential theory[J]. Natural Gas Chemical Industry, 2003, 28(5): 28-31.
14. [14]
  [14] 李明. 甲烷在AX-21活性炭上吸附特性的研究. 天津: 天津大学化工学院, 1998. (Li Ming. Study of adsorption characteristics of methane on the AX-21 activated carbon. Tianjin: Tianjin University, 1998.)
1. [1]
  Qiqi Li , Su Zhang , Yuting Jiang , Linna Zhu , Nannan Guo , Jing Zhang , Yutong Li , Tong Wei , Zhuangjun Fan . Preparation of High Density Activated Carbon by Mechanical Compression of Precursors for Compact Capacitive Energy Storage. Acta Physico-Chimica Sinica, 2025, 41(3): 100028-0. doi: 10.3866/PKU.WHXB202406009
2. [2]
  Yutong Liu , Xuemin Jing . Research Progress on the Catalytic Conversion of Methane in the Context of the “Dual Carbon” Goals. University Chemistry, 2025, 40(10): 101-113. doi: 10.12461/PKU.DXHX202412018
3. [3]
  Jianjun LI , Mingjie REN , Lili ZHANG , Lingling ZENG , Huiling WANG , Xiangwu MENG . UV-assisted degradation of tetracycline hydrochloride by MnFe₂O₄@activated carbon activated persulfate. Chinese Journal of Inorganic Chemistry, 2024, 40(10): 1869-1880. doi: 10.11862/CJIC.20240187
4. [4]
  Jing Zhang , Su Zhang , Qiqi Li , Linken Ji , Yutong Li , Yukang Ren , Xiaobei Zang , Ning Cao , Han Hu , Peng Liang , Zhuangjun Fan . Integrating high surface area and electric conductivity in activated carbon by in situ formation of the less-defective carbon network during selective chemical etching. Acta Physico-Chimica Sinica, 2025, 41(10): 100114-0. doi: 10.1016/j.actphy.2025.100114
5. [5]
  Feifei Yang , Wei Zhou , Chaoran Yang , Tianyu Zhang , Yanqiang Huang . Enhanced Methanol Selectivity in CO₂ Hydrogenation by Decoration of K on MoS₂ Catalyst. Acta Physico-Chimica Sinica, 2024, 40(7): 2308017-0. doi: 10.3866/PKU.WHXB202308017
6. [6]
  Guanghui SUI , Yanyan CHENG . Application of rice husk-based activated carbon-loaded MgO composite for symmetric supercapacitors. Chinese Journal of Inorganic Chemistry, 2025, 41(3): 521-530. doi: 10.11862/CJIC.20240221
7. [7]
  Qing Xue , Shengyi Li , Yanan Zhao , Peng Sheng , Li Xu , Zhengxi Li , Bo Zhang , Hui Li , Bo Wang , Libin Yang , Yuliang Cao , Zhongxue Chen . Novel Alkaline Sodium-Ion Battery Capacitor Based on Active Carbon||Na_0.44MnO₂ towards Low Cost, High-Rate Capability and Long-Term Lifespan. Acta Physico-Chimica Sinica, 2024, 40(2): 2303041-0. doi: 10.3866/PKU.WHXB202303041
8. [8]
  Wenlong Wang , Wentao Hao , Lang He , Jia Qiao , Ning Li , Chaoqiu Chen , Yong Qin . Bandgap and adsorption engineering of carbon dots/TiO₂ S-scheme heterojunctions for enhanced photocatalytic CO₂ methanation. Acta Physico-Chimica Sinica, 2025, 41(9): 100116-0. doi: 10.1016/j.actphy.2025.100116
9. [9]
  Xiaosong PU , Hangkai WU , Taohong LI , Huijuan LI , Shouqing LIU , Yuanbo HUANG , Xuemei LI . Adsorption performance and removal mechanism of Cd(Ⅱ) in water by magnesium modified carbon foam. Chinese Journal of Inorganic Chemistry, 2024, 40(8): 1537-1548. doi: 10.11862/CJIC.20240030
10. [10]
  Yang ZHOU , Lili YAN , Wenjuan ZHANG , Pinhua RAO . Thermal regeneration of biogas residue biochar and the ammonia nitrogen adsorption properties. Chinese Journal of Inorganic Chemistry, 2025, 41(8): 1574-1588. doi: 10.11862/CJIC.20250032
11. [11]
  Junqiao Zhuo , Xinchen Huang , Qi Wang . Symbol Representation of the Packing-Filling Model of the Crystal Structure and Its Application. University Chemistry, 2024, 39(3): 70-77. doi: 10.3866/PKU.DXHX202311100
12. [12]
  Shule Liu . Application of SPC/E Water Model in Molecular Dynamics Teaching Experiments. University Chemistry, 2024, 39(4): 338-342. doi: 10.3866/PKU.DXHX202310029
13. [13]
  Ruilin Han , Xiaoqi Yan . Comparison of Multiple Function Methods for Fitting Surface Tension and Concentration Curves. University Chemistry, 2024, 39(7): 381-385. doi: 10.3866/PKU.DXHX202311023
14. [14]
  Zixuan Jiang , Yihan Wen , Kejie Chai , Weiming Xu . Exploring Chemistry Bridging Education from Data-Driven to Symbol Establishment within the Framework of AI Models. University Chemistry, 2025, 40(9): 132-141. doi: 10.12461/PKU.DXHX202502004
15. [15]
  Yalu Ma , Yun Tian , Xiaofei Ma . DeepSeek Large Model: Implications for Inorganic Chemistry Teaching and Learning. University Chemistry, 2025, 40(9): 171-177. doi: 10.12461/PKU.DXHX202502109
16. [16]
  Xiaolong Zhang , Mingshan Jin , Shaoli Liu , Bingfei Yan , Yun Li . Constructing High-Precision Potential Energy Surfaces Based on Physical Models: A Comprehensive Computational Chemistry Experiment. University Chemistry, 2025, 40(10): 257-262. doi: 10.12461/PKU.DXHX202411049
17. [17]
  Wen YANG , Didi WANG , Ziyi HUANG , Yaping ZHOU , Yanyan FENG . La promoted hydrotalcite derived Ni-based catalysts: In situ preparation and CO₂ methanation performance. Chinese Journal of Inorganic Chemistry, 2024, 40(3): 561-570. doi: 10.11862/CJIC.20230276
18. [18]
  Wenwen Ma , Liyan Liu , Chengyang Yin , Hongdan Zhang , Lian Kong , Na Wei , Zhan Yu , Zhen Zhao . Exploration of the Online and Offline Mixed Teaching Mode of Specialized English for Chemistry Majors Based on the BOPPPS Model. University Chemistry, 2025, 40(9): 287-294. doi: 10.12461/PKU.DXHX202410026
19. [19]
  Xueqi Yang , Juntao Zhao , Jiawei Ye , Desen Zhou , Tingmin Di , Jun Zhang . 调节NNU-55(Fe)的d带中心以增强CO₂吸附和光催化活性. Acta Physico-Chimica Sinica, 2025, 41(7): 100074-0. doi: 10.1016/j.actphy.2025.100074
20. [20]
  Yiting Huo , Xin Zhou , Feifan Zhao , Chenbin Ai , Zhen Wu , Zhidong Chang , Bicheng Zhu . Boosting photocatalytic CO₂ methanation through TiO₂/CdS S-scheme heterojunction and fs-TAS mechanism study. Acta Physico-Chimica Sinica, 2025, 41(11): 100148-0. doi: 10.1016/j.actphy.2025.100148

Get Citation

PDF

XML

Metrics

PDF Downloads(0)
Abstract views(986)
HTML views(114)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142