The Library

Dynamics of BaCl2-NH3 adsorption pair

Tools

Zhong, Y., Critoph, Robert E., Thorpe, Roger and Tamainot-Telto, Zacharie. (2009) Dynamics of BaCl2-NH3 adsorption pair. Applied Thermal Engineering, Vol.29 (No.5-6). pp. 1180-1186. ISSN 1359-4311

Preview

PDF
WRAP_Critoph_220312-dynamics_of_bacl2-nh3_adsorption_pair.pdf - Accepted Version - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (621Kb)

Official URL: http://dx.doi.org/10.1016/j.applthermaleng.2008.06...

Abstract

To obtain accurate kinetics of adsorption pairs, dynamic tests of a composite adsorbent material (BaCl2 impregnated into a vermiculite matrix) and ammonia were performed on small samples under isothermal conditions and on a larger quantity in a laboratory scale adsorption system. The experimental results show that the size of the pressure swing plays an important role in the dynamics of adsorption pairs. This driving pressure difference affects the mass transfer of NH3 through the pores of adsorbent and therefore the performance of the complete adsorption system. A modified Linear Driving Force (LDF) model was used to fit the experimental results. It was shown that the model can predict the dynamics of both adsorption and desorption fairly well and can be used for the modelling of the adsorption system and adsorption cycles.

Item Type:	Journal Article
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Science > Engineering
Library of Congress Subject Headings (LCSH):	Adsorption, Ammonia -- Absorption and adsorption, Barium compounds -- Absorption and adsorption
Journal or Publication Title:	Applied Thermal Engineering
Publisher:	Pergamon-Elsevier Science Ltd.
ISSN:	1359-4311
Official Date:	April 2009
Volume:	Vol.29
Number:	No.5-6
Number of Pages:	7
Page Range:	pp. 1180-1186
Identification Number:	10.1016/j.applthermaleng.2008.06.015
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
References:	[1] V.E. Sharonov, J.V. Veselovskaya, Yu.I. Aristov, Ammonia sorption on composites ‘‘CaCl2 in inorganic host matrix”: isosteric chart and its performance, International Journal of Low Carbon Technologies 1 (3) (2006) 191–200. [2] C.H. Liaw, J.S.P. Wang, R.H. Greenkorn, K.C. Chao, Kinetics of fixed bed adsorption: a new solution, AIChE Journal 25 (1979) 376. [3] B. Dawoud, Yu.I. Aristov, Experimental study on the kinetics of water vapor sorption on selective water sorbents, silica gel and alumina under typical operating conditions of sorption heat pumps, International Journal of Heat and Mass Transfer 46 (2003) 273–281. [4] Yu.I. Aristov, I.S. Glaznev, A. Freni, G. Restuccia, Kinetics of water sorption on SWS-1L (calcium chloride confined to mesoporous silica gel): influence of grain size and temperature, Chemical Engineering Science 61 (2006) 1453–1458. [5] Z. Aidoun, M. Ternan, The synthesis reaction in a chemical heat pump reactor filled with chloride salt impregnated carbon fibres: the NH3–CoCl2 system, Applied Thermal Engineering 22 (2002) 1943–1954. [6] Z. Aidoun, M. Ternan, The unsteady state overall heat transfer coefficient in a chemical heat pump reactor: the NH3–CoCl2 system, Chemical Engineering Science 59 (2004) 4023–4031. [7] E. Gluekauf, Theory of chromatography, Part 10, Formula for diffusion into spheres and their application to chromatography, Transactions of the Faraday Society 51 (1955) 1540–1551. [8] J. Kaerger, D.M. Ruthven, Diffusion in Zeolites and Other Microporous Solids, John Wiley, NY, 1992. [9] S. Sircar, J.R. Hufton, Why does the linear driving force model for adsorption kinetics work?, Adsorption 6 (2000) 137–147 [10] J. Karger, D.M. Ruthven, Diffusion in Zeolites and other Microporous Solids, John Wiley & Sons Inc., USA, 1991. [11] Chi Tien, Adsorption Calculations and Modeling, Butterworth Heinemann, London, 1994. [12] V. Goetz V, A. Marty, A model for reversible solid–gas reactions submitted to temperature and pressure constraints: simulation of the rate of reaction in solid–gas reactor used as chemical heat pump, Chemical Engineering Science 47 (17-18) (1992) 4445–4454. [13] M. Lebrun, B. Spinner, Models of heat and mass transfers in solid–gas reactors used as chemical heat pumps, Chemical Engineering Science 45 (7) (1990) 1743–1753. [14] H.B. Lu, N. Mazet, B. Spinner, Modeling of gas–solid reaction – coupling of heat and mass transfer with chemical reaction, Chemical Engineering Science 51 (15) (1996) 3829–3845. [15] V.E. Sharonov, J.V. Veselovskaya, Yu.I. Aristov, Y. Zhong, R.E. Critoph, New composite adsorbent of ammonia ‘‘BaCl2 in vermiculate” for adsorptive cooling, CHP (2006), in: Proc. HPC06, Newcastle, 2006. [16] Y. Zhong, Studies on equilibrium and dynamic characteristics of new adsorption pairs, Ph.D. Dissertation, University of Warwick, 2006. [17] R.E. Critoph, Y. Zhong, S.J. Metcalf, Dynamic modelling of solar thermal cooling using the BaCl2 – ammonia pair, in: Proc. World Renewable Energy Congress, Florence, August 2006. [18] Y. Zhong, R.E. Critoph, R.N. Thorpe, Z. Tamainot-Telto, Yu.I. Aristov, Isothermal sorption characteristics of the BaCl2–NH3 pair in a vermiculite host matrix, Applied Thermal Engineering 27 (2007) 2455–2462. [19] Z. Tamainot-Telto, R.E. Critoph, Cost effective carbon–ammonia generators, Report No. ENK5-CT2002-00632-UW1, October 2003, School of Engineering, University of Warwick.
URI:	http://wrap.warwick.ac.uk/id/eprint/28493