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doi: 10.3850/978-981-08-7614-2_IMPRES058
Adsorption Isotherm of Methane/Maxsorb III Pair for a Wide Range of Temperature
Kazi Afzalur Rahman1, Wai Soong Loh1, Kim Choon Ng1,a, Idrus Alhamid2 and Won Gee Chun3
1Department of Mechanical Engineering, National University of Singapore 9 Engineering Drive 1, Singapore 117576.
ampengkc@nus.edu.sg
2Department of Mechanical Engineering, University of Indonesia, Kampus UI, Depok 16424 Indonesia
3Department of Nuclear and Energy Engineering, Cheju National University 66 Jejudaehakno, Jejusi, South Korea
ABSTRACT
The adsorption isotherm of an adsorbate-adsorbent pair is the key information for storage capacity and thermal management of adsorptive gas storage system. This article presents the adsorption isotherm of methane, which is the major component of natural gas, on pitch-based activated carbon type Maxsorb III for a wide range of temperature (120 to 350) K and pressure up to 2.5 MPa. The uptake values have been experimentally measured using volumetric technique. Since the Maxsorb III sample is highly microporous and heterogeneous in surface structure, the popular Tóth isotherm model is used to fit the data due its accountability of the heterogeneity parameter. The measured uptake data are useful to estimate the charge pressure of adsorbed natural gas storage system at different adsorbent temperature for constant adsorption capacity.
Keywords: Activated carbon, Natural gas, Adsorption isotherm.
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