| Title: | Adsorption of mesitylene via mesoporous adsorbents |
| Author(s): | Nien KC; Chang FT; Chang MB; |
| Address: | "a Graduate Institute of Environmental Engineering , National Central University , Taoyuan City , Taiwan , Republic of China. b JG Environmental Technology Co., Ltd ., Taoyuan City , Taiwan , Republic of China" |
| DOI: | 10.1080/10962247.2017.1359701 |
| ISSN/ISBN: | 2162-2906 (Electronic) 1096-2247 (Linking) |
| Abstract: | "Mesitylene (or 1,3,5-trimethylbenzene) is a volatile organic compound emitted from various industrial processes, e.g., spray coating. Its emissions have become a critical issue because mesitylene is toxic and cannot be removed using traditional adsorbents, e.g., zeolite (H-ZSM-5; the diameter of mesitylene molecules is greater than the pore size of H-ZSM-5). Hence, an adsorbent with a large pore size, MCM-41, is used in this study to investigate its adsorption capacity for mesitylene and compare with that of H-ZSM-5. Experimental results reveal that MCM-41 without Al(2)O(3) exhibits a good adsorption capacity (184 mg/g) for the gas stream containing 100 ppm of mesitylene at a relative humidity of 10%. The adsorption kinetics is well described by the Freundlich isotherm. Furthermore, experimental results reveal that MCM-41 is effective for the adsorption of low concentrations (10 ppm) of mesitylene. In addition, adsorption-desorption tests revealed that the sample MCM-41-AS is stable to sustain the adsorption capacity after 10 adsorption-desorption cycles. After 10 adsorption-desorption cycles, MCM-41-AS retains 92.4% of its initial adsorption capacity (170 vs. 184 mg/g). Finally, MCM-41 and H-ZSM-5 in series are effective for the simultaneous removal of mesitylene and toluene in the gas stream. IMPLICATIONS: This study aims to improve the performance of adsorbent for mesitylene, which is typically applied in the spray-coating industry. The zeolite MCM-41-AS is selected as a candidate for the investigation. Experimental results reveal that MCM-41-AS exhibits a good adsorption capacity for mesitylene and that it can be integrated with H-ZSM-5-25 for the simultaneous adsorption of mesitylene and toluene" |
| Keywords: | Adsorption Benzene Derivatives/*analysis/chemistry Environmental Pollutants/*analysis/chemistry Kinetics Occupational Exposure/prevention & control Silicon Dioxide/*chemistry Toluene/analysis/chemistry; |
| Notes: | "MedlineNien, Kai Chun Chang, Feng Tang Chang, Moo Been eng 2017/07/26 J Air Waste Manag Assoc. 2017 Dec; 67(12):1319-1327. doi: 10.1080/10962247.2017.1359701. Epub 2017 Jul 25" |
