Experimental study on the effects of sediment size and porosity on contaminant adsorption/desorption and interfacial diffusion characteristics

Knowledge of the bedding plane properties of coal seams is essential for the coalbed gas production because of their great influence on the inner flow characteristics and sorption features of gas and water. In this study, an experimental study on the anisotropic gas adsorption–desorption and permeability of coal is presented. The results show that during the adsorption–desorption process, an increase in the bedding plane angle of the specimen expands the length and area of the contact surface, thereby increasing the speed and quantity of adsorption and desorption. With an increase in the bedding angle, the number of pores and cracks was found to increase together with the volumetric strain. The evolution of permeability of coal heavily depended on stress–strain stages. The permeability decreased with the increase of stress at the initial compaction and elastic deformation stages, while it increased with the increase of stress at the stages of strain-hardening, softening and residual strength. Initial permeability increased with increasing bedding angle.

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An experimental study on the effects of freeze–thaw cycles on phosphorus adsorption–desorption processes in brown soil

RSC Advances ◽

10.1039/c7ra05220k ◽

2017 ◽

Vol 7 (59) ◽

pp. 37441-37446 ◽

Cited By ~ 7

Author(s):

Qingzhi Wang ◽

Jiankun Liu ◽

Lingqing Wang

Keyword(s):

Experimental Study ◽

Chemical Properties ◽

Physical And Chemical Properties ◽

Phosphorus Adsorption ◽

Soil P ◽

Freeze Thaw ◽

Chemical Properties Of Soils ◽

Adsorption Desorption ◽

Physical And Chemical ◽

And Chemical Properties

Freeze–thaw cycles (FTCs) can strongly influence the physical and chemical properties of soils in cold regions, which can in turn affect the adsorption–desorption characteristics of phosphorus (P) in the soil.

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Experimental Study of a Laminar Flow Solid Desiccant Dehumidifier Driven by a Low Temperature Heat Source

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.819.361 ◽

2016 ◽

Vol 819 ◽

pp. 361-365 ◽

Cited By ~ 1

Author(s):

Seung Jin Oh ◽

Kyaw Thu ◽

Muhammad Wakil Shahzad ◽

Wongee Chun ◽

Kim Choon Ng

Keyword(s):

Experimental Study ◽

Low Temperature ◽

Laminar Flow ◽

Heat Source ◽

Silica Gel ◽

Average Diameter ◽

Hot Water ◽

Dry Air ◽

Temperature Heat ◽

Adsorption Desorption

In this paper, an experimental study of a laminar flow solid desiccant dehumidifier has been presented. The cyclic steady state performance of adsorption-desorption processes was analyzed at various heat source temperatures and typical ambient humidity conditions in tropics. The desiccant dehumidification system consists of two beds filled with silica gel, two heat exchangers operating at 30 oC and 80 oC respectively, three humidity stations for measurement of the temperature and humidity conditions of the system and a blower to make airflow throughout the system. Type-RD silica gel of 0.3 mm average diameter was used as the working desiccant in the dehumidification system. This system has no moving parts rendering less maintenance compared with a rotary type. It is also energy-efficient means of dehumidification by adsorption process with low temperature heat source as compared to the conventional methods. As a result, it was observed the humidity ratio of inlet air is reduced from 24 g/kg of dry air to about 17 g/kg of dry air. Concomitantly, hot water at 80 oC is used to regenerate the adsorbent.

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A GCMC simulation and experimental study of krypton adsorption/desorption hysteresis on a graphite surface

Journal of Colloid and Interface Science ◽

10.1016/j.jcis.2016.06.033 ◽

2016 ◽

Vol 478 ◽

pp. 402-412 ◽

Cited By ~ 11

Author(s):

Luisa Prasetyo ◽

Toshihide Horikawa ◽

Poomiwat Phadungbut ◽

Shiliang (Johnathan) Tan ◽

D.D. Do ◽

...

Keyword(s):

Experimental Study ◽

Graphite Surface ◽

Gcmc Simulation ◽

Desorption Hysteresis ◽

Adsorption Desorption ◽

Krypton Adsorption

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Experimental Study on a Chemisorption Refrigeration System Prototype Using Expanded Graphite/Activated Carbon/Lithium Chloride-Ammonia Working Pair in a Solution of 25% NH3

Materials Science Forum ◽

10.4028/www.scientific.net/msf.947.52 ◽

2019 ◽

Vol 947 ◽

pp. 52-57

Author(s):

Mauricio Carmona ◽

Eduar Pérez ◽

Julian Yepes ◽

Silvana Villalobos

Keyword(s):

Experimental Study ◽

Activated Carbon ◽

Lithium Chloride ◽

Expanded Graphite ◽

Refrigeration System ◽

Experimental Protocol ◽

Cooling Effects ◽

Adsorption Desorption ◽

System Prototype ◽

Experimental Rig

This paper presents the experimental results given by the operation of a chemical sorption refrigeration system using Expanded Graphite/Activated Carbon/Lithium Chloride (AC/GE/LiCl)-Adsorbent (NH3 in solution with a 25% concentration). Experimental protocol with the characteristics of the experimental rig developed, working pair specifications and the procedure that has developed in the process is described in detail. Results are presented for different behaviors of the system, where the desorption stage is driven by forced convection. Measurements of the thermal variables of the system show that the adsorption-desorption cycles in the test accomplished, with high and low-pressure zones clearly defined. The cooling effects for the pair material studied have the expected behavior for the mixture proposed.

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