采用浸渍共沉积法,以陶瓷纤维纸为基材,钴盐、铝盐或钛盐为改性剂,顺次经水玻璃、酸性盐溶液,制得了金属离子掺杂硅胶吸附剂.探讨了盐含量、温度、pH值等对改性硅胶吸附性能的影响.静态吸附测试及多孔介质表面分析表明:经金属离子掺杂改性,可以使硅胶吸附性能明显增强,BET比表面积、孔容、平均孔径明显增大;饱和吸附量及BET比表面积按铝掺杂硅胶、钛掺杂硅胶、钴掺杂硅胶及硅胶的顺序减少;前期吸附速率(1000s)、平均孔径及其热稳定性按钴掺杂硅胶、铝掺杂硅胶、钛掺杂硅胶及硅胶的顺序递减.饱和吸附量与BET比表面积相关性分析显示,掺杂改性硅胶仍以物理吸附为主.
参考文献
| [1] | S. P. Halliday;C. B. Beggs;P. A. Sleigh .The use of solar desiccant cooling in the UK: a feasibility study[J].Applied thermal engineering: Design, processes, equipment, economics,2002(12):1327-1338. |
| [2] | Thorpe GR .The modelling and potential applications of a simple solar regenerated grain cooling device.[J].Postharvest biology and technology,1998(2):151-168. |
| [3] | Subramanyam N;Maiya M P;Murthy S S .Application of desiccant wheel to control humidity in air-conditioning systems[J].Applied Thermal Engineering,2004,24(18):2777. |
| [4] | 方玉堂,丁静,范娟,杨建平,杨晓西.陶瓷基硅胶吸附材料的实验研究[J].化学工程,2005(02):35-38. |
| [5] | Kuma T;Okano H .Active gas adsorbing element and method of manufacturing[P].US 4886769,1989-12-12. |
| [6] | Kuma T;Hirose T .Performance of honeycomb rotor dehumidifiers in improved methods of adsorption preparation[J].Journal of Chemical Engineering of Japan,1996,29(02):376. |
| [7] | 方玉堂,丁静,范娟,杨建平,杨晓西.新型铝改性硅胶吸附材料的制备与性能[J].无机材料学报,2005(04):933-939. |
| [8] | 方玉堂,易立群,刘艳山,高学农.陶瓷基钛掺杂硅胶块体吸附剂研究[J].化学学报,2006(06):515-520. |
| [9] | Cho S H;Kim J N .Modeling of a silica gel/water adsorption-cooling system[J].Energy,1992,17(09):829. |
| [10] | 吴亚琴.硅胶转轮除湿机的试制[J].制冷技术,2004(03):37-38. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%