Composites “lithium halides in silica gel pores”: Methanol sorption equilibrium

Abstract This paper presents the methanol sorption equilibrium and phase composition of two composite sorbents “LiCl and LiBr confined to mesopores of silica gel”. Chemical phase analysis of the samples was performed by the differential dissolution method. Phase transformation of the composites during methanol sorption was characterized in situ by X-ray diffraction analysis. The isobars of methanol sorption on the composites were measured in the temperature range T  = 293–423 K and for methanol pressure P MeOH  = 21–300 mbar using a thermo-gravimetric technique. It was found that the two composites showed an outstanding sorption capacity w max  = 0.8 g/g and an energy storage ability E max  = 1.0 kJ/g, which could be attractive for development of efficient adsorptive cooling/heating and energy storage systems driven by a low temperature heat source.

[1]  A. Freni,et al.  Water sorption on composites LiBr in a porous carbon , 2002 .

[2]  T. Radnai,et al.  Complementary relation between ion-counterion and ion-solvent interaction in lithium halide-methanol solutions , 2002 .

[3]  Giovanni Restuccia,et al.  Selective water sorbents for multiple applications, 1. CaCl2 confined in mesopores of silica gel: Sorption properties , 1996 .

[4]  Z. Prokop,et al.  Polymer adsorbents for methanol separation from a hydrocarbon stream , 1992 .

[5]  A. Wakisaka,et al.  Solvation for Ions and Counterions: Complementary Relation between Ion−Counterion and Ion−Solvent Interaction , 2002 .

[6]  I. Dékány,et al.  Interactions of Hydrophobia Layer Silicates with Alcohol‐Benzene Mixtures I. Adsorption Isotherms , 1986 .

[7]  F. Russo,et al.  Experimental investigation of a solid adsorption chiller based on a heat exchanger coated with hydrophobic zeolite , 2005 .

[8]  David J. Schiffrin,et al.  Nanotechnology and nucleotides , 1996, Nature.

[9]  J. Pires,et al.  Adsorption of volatile organic compounds in Y zeolites and pillared clays , 2001 .

[10]  M. S. El-shall,et al.  Room-Temperature Synthesis and Characterization of Nanocrystalline CdS, ZnS, and CdxZn1-xS , 2002 .

[11]  J. Nedeljković.  Nanoengineering of Inorganic and Hybrid Composites , 2000 .

[12]  K. Mahmood,et al.  Thermodynamic studies of methanol adsorption on metal impregnated γ-alumina samples , 2004 .

[13]  V. Malakhov.  Stoichiography as applied to studying composition and real structure of catalysts , 2000 .

[14]  Ulrich Simon,et al.  Charge Transport in Nanoparticle Arrangements , 1998 .

[15]  M. Bülow,et al.  Measurement of sorption equilibria under isosteric conditions The principles, advantages and limitations , 2002 .

[16]  A. Gedanken,et al.  Evaluation of metal oxide phase assembling mode inside the nanotubular pores of mesostructured silica , 2005 .

[17]  Klaas R. Westerterp,et al.  Methanol synthesis in a countercurrent gas-solid-solid trickle flow reactor. An experimental study , 1987 .

[18]  A. Zukal,et al.  Formation of CdS nanoparticles within functionalized siliceous MCM-41 , 2001 .

[19]  Yuri I. Aristov,et al.  Impact of phase composition on water adsorption on inorganic hybrids "salt/silica". , 2006, Journal of colloid and interface science.

[20]  A. Tuel.  Modification of mesoporous silicas by incorporation of heteroelements in the framework , 1999 .

[21]  Vasily E. Sharonov,et al.  Ammonia sorption on composites ‘CaCl2 in inorganic host matrix’: isosteric chart and its performance , 2006 .

[22]  G. Cacciola,et al.  A family of new working materials for solid sorption air conditioning systems , 2002 .

[23]  Ruzhu Wang,et al.  Adsorption ice makers for fishing boats driven by the exhaust heat from diesel engine: choice of adsorption pair , 2004 .

[25]  Adsorption on Ti- and Al-containing mesoporous materials prepared from fluorosilicon , 2001 .

[26]  P. Hopkins.  Adsorption of hydrocarbons on sodium and demetallated synthetic faujasites , 1973 .

[27]  Yuri I. Aristov,et al.  Effective Inorganic Hybrid Adsorbents of Water Vapor by the Sol−Gel Method , 1997 .

[28]  Seung-Kyo Oh.  Total Pressure Measurements for Lithium Chloride + Methanol + Ethanol at 303.15 K , 1997 .

[29]  Ulrich Simon,et al.  Electrical properties of nanoscaled host/guest compounds , 2000 .

[30]  B. Saha,et al.  Study on adsorption refrigeration cycle utilizing activated carbon fibers. Part 1. Adsorption characteristics , 2006 .

[31]  Ruzhu Wang,et al.  Development of a new synthesized adsorbent for refrigeration and air conditioning applications , 2006 .

[32]  A. Freni,et al.  Influence of Characteristics of Methanol Sorbents “Salts in Mesoporous Silica” on the Performance of Adsorptive Air Conditioning Cycle , 2007 .

[33]  M. Polanyi,et al.  Section III.—Theories of the adsorption of gases. A general survey and some additional remarks. Introductory paper to section III , 1932 .

[34]  Yu. I. Aristov,et al.  Sorption equilibrium of methanol on new composite sorbents “CaCl2/silica gel” , 2007 .

[35]  H. Oosaka.  Cryoscopic Studies on the Transition Points of the Compounds of Organic Solvents with Salts. III. The Congruent Melting Points of some Alcoholates of Alkali Halides , 1937 .

[36]  I. Vasilyeva,et al.  Composition characterization of Bi2Sr2CaCu2Ox single crystals by differential dissolution technique , 1999 .