Removal of phosphorus and sulfur from yellow phosphorus off-gas by metal-modified activated carbon |
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| Authors: | Ping Ning Xiangyu Wang Hans-Jörg BartSenlin Tian Yong ZhangXue-Qian Wang |
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| Institution: | a Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, 650093 Kunming, China
b Lehrstuhl für Thermische Verfahrenstechnik, TU Kaiserslautern, D 67653 Kaiserslautern, Germany |
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| Abstract: | In order to provide comprehensive utilization of high concentration CO for mono-carbon (C1) chemical industry, the purification of yellow phosphorus off-gas is of great concern. In this research, activated carbon (AC) modified by different impregnants were used for removal of PH3, H2S, SO2, COS, and CS2 in yellow phosphorus off-gas. For the removal of PH3, AC impregnated with 0.10 mol L−1 CuAc2 was proved to be the best adsorbent. And removal efficiency of H2S could be significantly enhanced by AC impregnated with 7% Na2CO3. The results of plant experiments suggested that the total concentration of the impurities in yellow phosphorus off-gas was less than 1 mg Nm−3 after purification operation. The metal-modified activated carbon (MMAC) was systematically characterized in terms of XPS, TGA, and DTA. The adsorption reaction mechanism was also investigated. As a result, the yellow phosphorus off-gas purified in this study can be used as a raw material gas in the C1 chemical industry. |
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| Keywords: | Yellow phosphorus off-gas PH3 H2S Modification Activated carbon Impregnant |
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