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Modeling of coal swelling induced by water vapor adsorption

Zhejun PAN

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1, Pages 94-103 doi: 10.1007/s11705-011-1172-2

Abstract: Gas adsorption-induced coal swelling is a well-know phenomenon. Coal swelling or shrinkage by adsorption or desorption of water vapor has not been well understood but has significant implications on gas drainage process for underground coal mining and for primary and enhanced coalbed methane production. Decreased matrix moisture content leads to coal shrinkage and thus the change of cleat porosity and permeability under reservoir conditions. Unlike gas adsorption in coal which usually forms a single layer of adsorbed molecules, water vapor adsorption in the coal micropores forms multilayer of adsorbed molecules. In this work, a model has been developed to describe the coal swelling strain with respect to the amount of moisture intake by the coal matrix. The model extended an energy balance approach for gas adsorption-induced coal swelling to water vapor adsorption-induced coal swelling, assuming that only the first layer of adsorbed molecules of the multilayer adsorption changes the surface energy, which thus causes coal to swell. The model is applied to describe the experimental swelling strain data measured on an Australian coal. The results show good agreement between the model and the experimental data.

Keywords： multilayer adsorption vapour pressure coal shrinkage relative humidity permeability

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Influence of environmental temperature and relative humidity on photocatalytic oxidation of toluene on

GUO Ting, BAI Zhipeng, WU Can, ZHU Tan

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2, Pages 224-229 doi: 10.1007/s11783-008-0039-3

Abstract: In this paper, the influence of environmental temperature (T) and relative humidity (RH) on the gas-solid

Keywords： application gas-solid adsorption technique TiO/ACF experimental

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Thermal/vacuum calibration of microwave humidity sounder on FY-3B satellite

Wang Zhenzhan,Zhang Shengwei,Li Jing,Li Yun,Wu Qiong

Strategic Study of CAE 2013, Volume 15, Issue 10, Pages 33-46

Abstract: style="text-align: justify;">The principle and methods on thermal/vacuum (T/V) testing of microwave humidity

Keywords： FY-3B satellite microwave humidity sounder prelaunch calibration thermal/vacuum testing

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The preparation and performance of lignin-based activated carbon fiber adsorbents for treating gaseous streams

Min Song, Wei Zhang, Yongsheng Chen, Jinming Luo, John C. Crittenden

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 3, Pages 328-337 doi: 10.1007/s11705-017-1646-y

Abstract: The effect of humidity on toluene gas-phase adsorption was predicted by using the Okazaki et al. modelOur study, which included material characterization, adsorption isotherms, kinetics, the impact of humidity

Keywords： lignin carbon fiber electrospinning toluene humidity

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Influence of the field humiture environment on the mechanical properties of 316L stainless steel repaired with Fe314

Lianzhong ZHANG, Dichen LI, Shenping YAN, Ruidong XIE, Hongliang QU

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 4, Pages 513-519 doi: 10.1007/s11465-018-0503-0

Abstract: laser cladding by using Fe314 powder without inert gas protection under different temperatures and humidity

Keywords： laser cladding repaired performance tensile strength temperature and humidity environment

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Processing and analysis of data from microwave humidity sounder onboard FY-3A satellite

He Jieying,Zhang Shengwei

Strategic Study of CAE 2013, Volume 15, Issue 10, Pages 47-53

Abstract:

Microwave humidity sounder (MWHS) is one of payloads on the Fengyun-3A

Keywords： MWHS FY-3A ANN water vapor density

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Design of Hygroscope for Tongue Moisture

Jia Guixi,Pei Xiaona,Kang Yingpeng,Zhu Kai

Strategic Study of CAE 2007, Volume 9, Issue 4, Pages 41-44

Abstract: Therefore, a hygroscope, which uses digital humidity and temperature sensor, was developed to test tongue

Keywords： tongue moisture mass transfer digital humidity temperature sensor

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Organic nitrogen in PM

Qian ZHANG,Fengkui DUAN,Kebin HE,Yongliang MA,Haiyan LI,Takashi KIMOTO,Aihua ZHENG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 6, Pages 1004-1014 doi: 10.1007/s11783-015-0799-5

Abstract: the both seasons, however with distinguished day and night difference patterns influenced by relative humidity

Keywords： organic nitrogen N:C ratio secondary day and night variation relative humidity (RH) acidity

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Abatement of mixed volatile organic compounds in a catalytic hybrid surface/packed-bed discharge plasma reactor

Lianjie Guo, Nan Jiang, Jie Li, Kefeng Shang, Na Lu, Yan Wu

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 2, doi: 10.1007/s11783-018-1017-z

Abstract: The effect of relative air humidity on mixed VOCs degradation has also been investigated in both plasma-only

Keywords： Mixed VOCs HSPBD plasma reactor Degradation Catalyst Relative humidity

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Antenna design and analysis of Fengyun-3 microwave humidity sounder

Wang Hongjian,Li Jing,Liu Heguang,Zhang Shengwei

Strategic Study of CAE 2009, Volume 11, Issue 4, Pages 39-45

Abstract:

Fengyun-3(FY-3) microwave humidity sounder antenna has the followingThis Antenna has great influence on the precision of the whole system of FY-3MHS (microwave humidity

Keywords： FY-3MHS offset parabolic antenna corrugated horn remote sensing

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The design and development of advanced microwave atmospheric counder onboard FY-3 satellite

Zhang Shengwei,Wang Zhenzhan,Sun Maohua,He Baoyu,Jiang Jingshan

Strategic Study of CAE 2013, Volume 15, Issue 7, Pages 81-87

Abstract: text-align: justify;">Advanced microwave atmospheric sounder (AMAS) is the new generation of microwave humiditythe AMAS still operated in cross-orbited scanning and used for deriving atmospheric temperature and humidity

Keywords： satellite advanced microwave atmospheric sounder cross-orbited scanning atmospheric temperature humidity