Effects of Pore Structure and Surface Property on Adsorption Performance of New Composite Adsorbing Material for Low Grade Heat Storage
, , , ,
1The Key Laboratory of Enhanced Heat Transfer & Energy Conservation of Ministry of Education, The School of Chemical and Energy Engineering, South China University of Technology, Guangzhou, China
2The School of Chemical Science, South China University of Technology, Guangzhou, China
A new composite adsorbing material for low grade heat storage — SiO2 · xH2O · yCaCl2 which is composed of macro-porous silica gel and calcium chloride is introduced. The effects of pore structure and surface property on adsorption performance of adsorbing material are investigated. Pore structure parameters such as BET surface areas and pore diameter distributions of macro-porous silica gel and four composite adsorbing materials with different CaCl2 content are measured using SEM and Asap2010 apparatus. According to the measured results, the pore structures of macro-porous silica gel, composite adsorbing materials and the CaCl2 stuff characteristics in pore are analyzed. An open cycle adsorptive heat storage system with composite adsorbing material-water working pair was developed to carry out the experiment test about adsorptive capacity and heat storage density. In the light of the above data tested, the main factor of effect on adsorption performance is analyzed, which offers the reference basis for developing the new-type absorbent further.
E.A. Levitskij, Yu.I. Aristov, M.M. Tokarev, et al. 1996. “Chemical Heat Accumulators”: A new approach to accumulating low potential heat. Solar Energy Materials and Solar Cells. Vol 44. pp219-235. Russia.
Aristov Yu I, Tokarev M M, Gordeeva L G, et al. 1999. New composite sorbents for solar driven technology of fresh water production from the atmosphere. Solar Energy. Vol 66(2). pp165-168. Russia.
Sing K S W, Everett D H, Haul R A W. 1985. Reporting Physisorption Data for Gas/Solid System with Special Reference to the Determination of Surface Area and Porosity. Pure and Applied Chemistry. Vol 57. pp603-619.
Li Jun, Zhu Dongsheng. 2004. Experimental study and simulation of hybrid adsorption thermal energy storage system. South China University of Technology Dissertation for Ph.D. June. China.
de Boer J H, Everett D H, Stone ED F S. 1958. The structure and Properties of Porous Materials. Oxford: Butterworth Publishing Co. pp68.
Liu Yefeng, Wang Ruzhu. 2003. Pore structure of new composite adsorbent SiO2 · xH2O · yCaCl2 with high uptake of water from air. Science in China (Series E). Vol 46. October. pp551-559. China.
Li Jun, Zhu Dong-sheng, Wu Hui-jun, et al. 2004. Experimental research no a novel adsorptive heat-storage compound material. Journal of South China University of Technology May. pp63-66. China.
Yu I. Aristov G, Marco D I, et al. 1997. Selective water sorbents for multiple application, 3. CaCl2 solution confined in micro-and mesoporous silica gels: Pore size effect on the ‘solidification-melting’ diagram. Reaction Kinetics and Catalysis Letters. pp147-154. Russia.
Yu. I. Aristov, G. Restuccia, G. Cacciola, et al. 2002. A family of new working materials for solid sorption air conditioning systems. Applied Thermal Engineering. pp191-204. Russia.
Mikhail Tokarev, Larissa Gordeeva, Vyacheslav Romannikov, et al. 2002. New composite sorbent CaCl2 in mesopores for sorption cooling/heating. Int. J. Therm. Sci. pp470-474. Russia
V. B. Fenelonov, V. N. Romannikov, A. Yu. Derevyankin. 1999. Mesopore size and surface area calculations for hexagonal mesophases (types MCM-41, FSM-16, etc.) using low-angle XRD and adsorption data. Microporous and Mesoporous. pp57-72. Russia.
WU Yongwen, LI Zhong, XI Hongxia. 2003. Effects of porosity and surface properties of polymeric resins on adsorption capacity of phenol. Journal of Chemcial Industry and Engineering. Vol 54. December. po1642-1645. China.
LI Jian, LI Shu-jun. 2002. Study on pore structure of woodceramics. Chemistry and Industry of Forest Products. Vol 22. October. pp27-30. China.
Zhou Guang-ying, Zhu Dong-sheng, Wu Hui-jun. 2004. Research development of working pair in adsorption refrigeration. Refrigeration. September. pp28-31. China.
LI Jun, ZHU Dong-sheng, FANG Li-guo, et al. 2003. Study and development on adsorption cold storage technology. Fluid Machinery. pp51-53. China.
LI Jun, ZHU Dongsheng, ZHANG Lizhi, et al. 2003. Applications of nano-technology in heat storage materials. Materials Review. September. pp135-137. China.
Y. Z. Lu, R. Z. Wang, M. Zhang, et al. 2003. Adsorption cold storage system with zeolite-water working pair used for locomotive air conditioning. Energy Conversion and Management. pp1733-1743. China
J. Janchen, D. Ackermann, H. Stach, et al. 2004. Studies of the water adsorption on zeolites and modified mesoporous materials for seasonal storage of solar heat. Solar Energy. pp339-344. South Korea.
How to cite this article
Cheng, J., Zhu, D., Yang, Z., Wu, H. and Liu, C. (2005). 'Effects of Pore Structure and Surface Property on Adsorption Performance of New Composite Adsorbing Material for Low Grade Heat Storage'. SET Proceedings, 4(1), pp. 424-428. https://doi.org/10.65582/set.2005.094
