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Dynamics of Pressure- and Temperature-Initiated Adsorption Cycles for Transformation of Low Temperature Heat: Flat Bed of Loose Grains Full article

Journal Applied Thermal Engineering
ISSN: 1359-4311 , E-ISSN: 1873-5606
Output data Year: 2020, Volume: 165, Article number : 114654, Pages count : 8 DOI: 10.1016/j.applthermaleng.2019.114654
Tags Activated carbon; Adsorptive heat transformation; Driving force; Methanol
Authors Girnik I.S. 1,2 , Okunev B.N. 3 , Aristov Y.I. 1,2
Affiliations
1 Boreskov Institute of Catalysis, Lavrentiev ave., 5, Novosibirsk, 630090, Russia
2 Novosibirsk State University, Pirogova Str., 2, Novosibirsk, 630090, Russia
3 Moscow State University, Chemistry Department, Vorobievi Gori, Moscow, 119992, Russia

Funding (1)

1 Russian Science Foundation 16-19-10259

Abstract: Despite significant progress made in adsorption heat transformation, still, there is a big room for it's further improving. This work addresses the dynamic study of methanol adsorption and comparison of two ways of the process initiation. The traditional way is due to fast temperature change (TI), and the less studied one is by quick pressure variation (PI). The appropriate temperature/pressure variations were selected similar to those in a new cycle “Heat from Cold” recently suggested for upgrading the ambient heat in cold countries. An activated carbon ACM-35.4, used as a methanol adsorbent, was located on metal support as a thin flat bed of loose grains. For a monolayer bed configuration, the dynamics is almost identical for the two initiation ways. Both TI and PI kinetic curves are exponential with a characteristic time, which depends on the process boundary conditions rather than the initiation mode. The mathematical model of methanol adsorption on a single spherical carbon grain is developed to explain these results. The perceptible difference is found for the multi-layer configuration of the carbon bed. The PI adsorption dynamics is faster than the TI one at short adsorption time and equal to it at long time. A possible reason for this difference is discussed. © 2019 Elsevier Ltd
Cite: Girnik I.S. , Okunev B.N. , Aristov Y.I.
Dynamics of Pressure- and Temperature-Initiated Adsorption Cycles for Transformation of Low Temperature Heat: Flat Bed of Loose Grains
Applied Thermal Engineering. 2020. V.165. 114654 :1-8. DOI: 10.1016/j.applthermaleng.2019.114654 WOS Scopus РИНЦ AN OpenAlex
Dates:
Submitted: Jun 15, 2019
Accepted: Nov 6, 2019
Published online: Nov 8, 2019
Published print: Jan 25, 2020
Identifiers:
Web of science: WOS:000503314300090
Scopus: 2-s2.0-85075357187
Elibrary: 43207109
Chemical Abstracts: 2019:2188672
OpenAlex: W2986916288
Citing:
DB Citing
Scopus 15
Web of science 15
Elibrary 14
OpenAlex 15
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