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Simultaneous NOx and SO2 removal during wet flue gas desulfurization, using copper smelter slag slurry combined with yellow phorphorus
The Canadian Journal of Chemical Engineering ( IF 1.6 ) Pub Date : 2020-11-10 , DOI: 10.1002/cjce.23925 Jiacheng Bao 1 , Helu Xiao 1 , Kai Li 2 , Chi Wang 2 , Xin Song 1 , Xin Sun 1 , Ping Ning 1 , Yansu Luo 1
The Canadian Journal of Chemical Engineering ( IF 1.6 ) Pub Date : 2020-11-10 , DOI: 10.1002/cjce.23925 Jiacheng Bao 1 , Helu Xiao 1 , Kai Li 2 , Chi Wang 2 , Xin Song 1 , Xin Sun 1 , Ping Ning 1 , Yansu Luo 1
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The study of copper slag has attracted the attention of scholars from both China and around the world. But few have paid attention to its applications in the simultaneous removal of SO2 and NOx in wet flue gas desulfurization (WFGD), becasue WFGD technique is inappropriate for directly treating NOx owing to the low solubility of NO. This work aims to improve NOx removal efficiency in WFGD technology using copper slag slurry associated with the oxidation of NOx by yellow phosphorus. Different operating conditions, including dispersion of P4, solid‐liquid ratio, initial pH value of copper slag slurry, reaction temperature, oxygen content, and gas flow rate, were compared regarding the efficiency of SO2 and NOx simultaneous removal. The characterizations were carried out on the liquid and solid part of fresh and spent copper slag slurry after filtration. The results indicated that a great amount of metals ions, such as Fe3+ and Zn2+, were leached by reacting with produced acids (H2SO4, HNO3, and H3PO4), which had a liquid‐phase catalytic oxidation on SIV species (SO32−/HSO3−), leading to promotion in absorption for SO2. The copper slag played a significant role in dispersing the yellow phosphorus and promoting ozone generation, thus improving NOx removal efficiency. The reaction pathway can be divided into three parts: (a) ozone generation induced by yellow phosphorus, (b) the oxidation of NO by O3 and then dissolution in aqueous solution, and (c) the dissolution of SO2 and the liquid‐phase oxidation for SO2 through metal ions produced by the reaction between acid and copper slag.
中文翻译：
铜冶炼炉渣浆与黄磷相结合在湿法烟气脱硫过程中同时去除NOx和SO2
铜渣的研究引起了国内外学者的关注。但是很少有人关注其在湿法烟气脱硫（WFGD）中同时去除SO 2和NO x的应用，因为WFGD技术由于NO的溶解度低而不适用于直接处理NO x。这项工作的目的是提高NO X使用与氧化相关的NO铜渣浆料的去除效率在WFGD技术X由黄色磷。不同的工作条件，包括P 4的分散比较了固液比，铜渣浆的初始pH值，反应温度，氧气含量和气体流速，以了解同时去除SO 2和NO x的效率。在过滤后，对新鲜和废铜渣浆液的液体和固体部分进行表征。结果表明，大量的金属离子，如Fe 3+和Zn 2+，通过与产生的酸（H 2 SO 4，HNO 3和H 3 PO 4）反应而浸出，这些酸具有液相S IV物种（SO 3 2- / HSO的催化氧化3 - ），导致促进吸收为SO 2。铜渣分散黄磷，促进臭氧的产生，从而提高NO发挥了作用显著X去除效率。反应路径可分为三部分：（a）黄磷引起的臭氧生成;（b）O 3氧化NO ，然后在水溶液中溶解;（c）SO 2和液体的溶解-通过酸和铜渣之间的反应产生的金属离子使SO 2发生相氧化。
更新日期：2020-11-10
中文翻译：
铜冶炼炉渣浆与黄磷相结合在湿法烟气脱硫过程中同时去除NOx和SO2
铜渣的研究引起了国内外学者的关注。但是很少有人关注其在湿法烟气脱硫（WFGD）中同时去除SO 2和NO x的应用，因为WFGD技术由于NO的溶解度低而不适用于直接处理NO x。这项工作的目的是提高NO X使用与氧化相关的NO铜渣浆料的去除效率在WFGD技术X由黄色磷。不同的工作条件，包括P 4的分散比较了固液比，铜渣浆的初始pH值，反应温度，氧气含量和气体流速，以了解同时去除SO 2和NO x的效率。在过滤后，对新鲜和废铜渣浆液的液体和固体部分进行表征。结果表明，大量的金属离子，如Fe 3+和Zn 2+，通过与产生的酸（H 2 SO 4，HNO 3和H 3 PO 4）反应而浸出，这些酸具有液相S IV物种（SO 3 2- / HSO的催化氧化3 - ），导致促进吸收为SO 2。铜渣分散黄磷，促进臭氧的产生，从而提高NO发挥了作用显著X去除效率。反应路径可分为三部分：（a）黄磷引起的臭氧生成;（b）O 3氧化NO ，然后在水溶液中溶解;（c）SO 2和液体的溶解-通过酸和铜渣之间的反应产生的金属离子使SO 2发生相氧化。
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