Experimental results of NO removal by the MBGLS

Micro & nano letters

article

Zhengguo Xiao¹  Tallal Bin Aftab¹  Xiaoling Yuan¹  Hualei Xia¹  Dengxin Li¹ 

[1] College of Environmental Science and Engineering, Donghua University;State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University

关键词: nitrogen compounds;    corrosion;    bubbles;    pH;    chemical engineering;    flue gases;    hydrogen compounds;    oxidation;    disperse systems;    sodium compounds;    air pollution control;    sorption;    iron;    manganese;    NO removal efficiency;    flue gas denitration;    MBGLS;    equipment corrosion;    low oxidant utilisation ratio;    microbubble gas–liquid dispersion system;    nitric oxide removal;    oxidation–absorption denitration process;    salinity;    cost-effective environment friendly method;    absorbent pH;    temperature 330.0 K;    NO;    NaCl;    Fe;    Mn;    H2O2;   

DOI  :  10.1049/mnl.2018.5699

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Existing oxidation–absorption denitration processes have some disadvantages such as high cost, equipment corrosion and low oxidant utilisation ratio. In this work, a novel denitration process with a microbubble gas–liquid dispersion system (MBGLS) was proposed. The nitric oxide (NO) removal effects of MBGLS based on the various absorbents containing hydrogen peroxide (H 2 O 2 ), salinity and metal ions were investigated. The results showed that the MBGLS had an excellent NO removal performance because of hydroxyl radicals (·OH) released by the MBs. H 2 O 2 , NaCl, Fe 2+ and Mn 2+ could enhance the removal properties of MBGLS, but excessive NaCl was not conducive to the removal of NO. Under the optimal reaction conditions (absorbent pH = 8, 330 K, 0.4 mol/l H 2 O 2 and 800 ppm NO), the NO removal efficiency reached 87.7%. This new process is highly cost-effective and environment friendly and shows a good commercial application prospect in flue gas denitration.

【 授权许可】

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