以分子筛为基材通过浸泡C aC l2和S rC l2溶液的方法制备复合吸附剂.在模拟制冷条件下,对以不同浓度溶液制备的复合吸附剂的吸附、解吸性能进行了测定,并将吸附解吸性能最好的复合吸附剂在自制的模拟制冷装置上进行了制冷实验.结果表明...以分子筛为基材通过浸泡C aC l2和S rC l2溶液的方法制备复合吸附剂.在模拟制冷条件下,对以不同浓度溶液制备的复合吸附剂的吸附、解吸性能进行了测定,并将吸附解吸性能最好的复合吸附剂在自制的模拟制冷装置上进行了制冷实验.结果表明,复合吸附剂具有良好的吸附、解吸性能,最大吸附量达51.6%,解吸率可达69.3%,在模拟制冷装置上系统的制冷系数达0.25,单位吸附剂的制冷功率为0.072 W/g,符合太阳能吸附制冷的要求.展开更多
Adsorption performance of adsorbents for the adsorption cooling cycle was discussed. Adsorption isotherms and adsorption rate of water or ethanol on composite adsorbents prepared by the authors (named M4-0132, M1- 000...Adsorption performance of adsorbents for the adsorption cooling cycle was discussed. Adsorption isotherms and adsorption rate of water or ethanol on composite adsorbents prepared by the authors (named M4-0132, M1- 0001, M1-9906 and M2-0003 respectively), were tested. The results of fitting to the micro-pore filling theory equation and calculation of characteristic ads orption work based on these pairs were presented. The results showed that the a mount of water adsorbed by composite adsorbents was as high as 2 times that by s ilica gel and 2.5 times that by 13X molecular sieve, respectively, and characte ristic adsorption work calculated was 2.55～4.78 kJ·mol-1, only 12%～29 % of that on 13X molecular sieve. The values of adsorption rate of water on com posite adsorbents were higher than that on silica gel. Analysis for ethanol ads orption on composite adsorbent, M1-0001, showed occurrence of capillary condens ation, which resulted in a considerably higher ethanol uptake than on activated carbon at higher relative vapor pressure. The characteristic adsorption work of ethanol on composite sorbents was 2.55～4.78 kJ·mol-1, merely 10%～20% of that on activated carbon. Based on comprehensive estimate of adsorption pro perties, including adsorption loading, characteristic adsorption work and adsorp tion rate etc., M4-0132 and M1-0001 composite adsorbents were more prefer red for the adsorption cooling process, and the preferable type of isotherm for adsorption cooling cycle appeared to be the Ⅴ type of Brunauer classification.展开更多
A continuous cycle unit to extract water from air was built, in which a new composite adsorbent SiO 2· x CaCl 2· y H 2O(CaCl 2 mass content is 38 4%)prepared by the authors was used.Each adsorber contains 1 ...A continuous cycle unit to extract water from air was built, in which a new composite adsorbent SiO 2· x CaCl 2· y H 2O(CaCl 2 mass content is 38 4%)prepared by the authors was used.Each adsorber contains 1 5 kg adsorbent.The operating characteristics of the unit were measured in the condition of Februany and March in east China.When adsorption and desorption time was two hours, 0 27 kg fresh water was obtained on night time operation(air average temperature 10 4 ℃ and relative humidity 77%), and 0 15 kg fresh water was obtained on day time operation(air average temperature 22 2 ℃ and relative humidity 44%).When macro porous silica gel is taken as adsorbent,1 0 kg adsorbent could be filled in each adsorber, and 0 06 kg fresh water was obtained in the condition of air average temperature 17 8 ℃ and relative humidity 55% with the same operation time.展开更多
文摘Adsorption performance of adsorbents for the adsorption cooling cycle was discussed. Adsorption isotherms and adsorption rate of water or ethanol on composite adsorbents prepared by the authors (named M4-0132, M1- 0001, M1-9906 and M2-0003 respectively), were tested. The results of fitting to the micro-pore filling theory equation and calculation of characteristic ads orption work based on these pairs were presented. The results showed that the a mount of water adsorbed by composite adsorbents was as high as 2 times that by s ilica gel and 2.5 times that by 13X molecular sieve, respectively, and characte ristic adsorption work calculated was 2.55～4.78 kJ·mol-1, only 12%～29 % of that on 13X molecular sieve. The values of adsorption rate of water on com posite adsorbents were higher than that on silica gel. Analysis for ethanol ads orption on composite adsorbent, M1-0001, showed occurrence of capillary condens ation, which resulted in a considerably higher ethanol uptake than on activated carbon at higher relative vapor pressure. The characteristic adsorption work of ethanol on composite sorbents was 2.55～4.78 kJ·mol-1, merely 10%～20% of that on activated carbon. Based on comprehensive estimate of adsorption pro perties, including adsorption loading, characteristic adsorption work and adsorp tion rate etc., M4-0132 and M1-0001 composite adsorbents were more prefer red for the adsorption cooling process, and the preferable type of isotherm for adsorption cooling cycle appeared to be the Ⅴ type of Brunauer classification.
文摘A continuous cycle unit to extract water from air was built, in which a new composite adsorbent SiO 2· x CaCl 2· y H 2O(CaCl 2 mass content is 38 4%)prepared by the authors was used.Each adsorber contains 1 5 kg adsorbent.The operating characteristics of the unit were measured in the condition of Februany and March in east China.When adsorption and desorption time was two hours, 0 27 kg fresh water was obtained on night time operation(air average temperature 10 4 ℃ and relative humidity 77%), and 0 15 kg fresh water was obtained on day time operation(air average temperature 22 2 ℃ and relative humidity 44%).When macro porous silica gel is taken as adsorbent,1 0 kg adsorbent could be filled in each adsorber, and 0 06 kg fresh water was obtained in the condition of air average temperature 17 8 ℃ and relative humidity 55% with the same operation time.
