A New Process Study on Comprehensive Utilization of NOx from Nitric Acid Plant

作     者：Zhou Hou-zhen, Liang Hua Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China Southwest Institute of Technical Physics, Chengdu 610041, Sichuan, China 

出 版 物：《Wuhan University Journal of Natural Sciences》 (武汉大学学报自然科学版(英文))

年 卷 期：2003年第S2期

页      面：1001-1006页

学科分类：07[理学] 070602[理学-大气物理学与大气环境] 0706[理学-大气科学] 

基　　金：Supported by the Key Research Program Fundation of the Education Bureau of Sichuan Province in China(1999127) 

主　　题：NOx nitric acid exhaust gas comprehensive utilization pyrolusite MnO2 

摘      要：Based on studies of controlling NOx from nitric acid exhaust gas domestic and abroad, this paper has developed a new technique on removal of NOx and production of aby-product with high added value-MnO2. Experimentshows, pyrolusite, whose valid composition is MnO2 , of absorbing NOx has the following characteristics: quick, low cost, no secondary pollutant. Moreover, exhaust gas can attain the required standards. If the temperature of the pyrolusite serum is 30℃ , pH = 4, containing 90 g/L MnO2, the absorptivity for 3 000 mg/m3 NOx is 89. 2%. Furthermore, few of the impurities in pyrolusite dissolve in the absorption mother solution. The purification cost of product is very low. The purity of end product MnO2 is more than 99. 995% after purifying. Therefore, it is workable for the new technique on economy and technology. There are also obvious environmental benefits and marked economic returns.