Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
J Hazard Mater. 2021 Feb 5;403:123971. doi: 10.1016/j.jhazmat.2020.123971. Epub 2020 Sep 15.
Directing to unwieldiness NOx emitted by the industry, the removal of NOx was implemented using yellow phosphorus (P) emulsion and red mud slurry as composite absorbent. Where yellow phosphorus is considered to stimulate formation of the ecological ozone (O) from O, the oxidation of insoluble NO into water-soluble NOx species by O, and the red mud as a pH buffer can be used to maintain the pH of the absorption liquid in a range that better absorbs NOx. NO is finally converted into NO and NO, whereas the yellow phosphorus is mainly PO. Single-factor influencing on the efficiency of denitration include the concentration of yellow phosphorus, reaction temperature, stirring intensity, gas flow rate, O content, and red mud solid-liquid ratio were investigated. Response surface methodology (RSM) was used to optimize the process parameters. It was indicated that the removal rate of NOx can reach 99.3% under the optimal conditions. Moreover, the possible denitration reaction mechanism was also discussed.
针对工业生产中氮氧化物（NOx）排放带来的种种问题，采用黄磷（P）乳液和赤泥浆作为复合吸收剂来去除 NOx。黄磷（P）被认为可以刺激氧气（O）形成生态臭氧（O），氧气（O）将不溶性的 NO 氧化成水溶性的 NOx 物质，赤泥作为 pH 缓冲剂可用于将吸收液的 pH 值维持在更有利于吸收 NOx 的范围内。NO 最终转化为 NO 和 NO，而黄磷（P）主要转化为 PO。单因素对脱硝效率的影响包括黄磷（P）浓度、反应温度、搅拌强度、气体流量、O 含量和赤泥固液比等因素。采用响应面法（RSM）对工艺参数进行优化。结果表明，在最佳条件下，NOx 的去除率可达到 99.3%。此外，还探讨了可能的脱硝反应机理。
