生物还原耦合化学吸收处理烟气中NOx的过程强化与调控机制

项目名称： 生物还原耦合化学吸收处理烟气中NOx的过程强化与调控机制

项目编号： No.21276233

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 化学工业

项目作者： 李伟

作者单位： 浙江大学

项目金额： 80万元

中文摘要： 本项目是基于已有的研究基础上，利用络合吸收的手段来强化烟气中一氧化氮（NO ）的气液传质过程，以提高NO 吸收容量；利用电极生物膜等手段提高吸收产物的还原速率，强化生物还原过程；基于碳源消耗规律、H2的利用效率，以及微生物群落特征及其动态变化规律，探明该体系中络合吸收产物([Fe(II)EDTA]NO和Fe(III)EDTA) 的还原途径、相互竞争机制。测定NO络合速率、Fe(II)EDTA氧化速率，[Fe(II)EDTA]NO和Fe(III)EDTA 的还原速率，分析速率控制步骤，揭示生物还原速率的限制性因素、提高NOx 处理负荷和NO处理效率的关键问题。阐明络合吸收-微生物还原处理氮氧化物过程中传质-反应机理，确立控制耦合过程的关键参数。本课题的研究结果，将为烟气脱硝这一日益迫切有待解决的问题，提供一种新的思路，并为该技术的工业化应用提供基础数据和依据。

中文关键词： 氮氧化物；络合吸收；生物电化学还原；传质反应；数学模拟

英文摘要： Based on the existing research, this project is aimed to enhance the process of mass transfer and the absorbing capacity of NO by using the complexation absorption. In order to enhance the process of biological reduction, bio-electrode reactor will be used to increase the reduction rate of the absorption products. On the basis of the carbon sources consumption, utilization efficiency of H2, and the characteristic of microbial community, the reduction pathway and competition mechanism of [Fe(II)EDTA]NO and Fe(III)EDTA in the scrubber solution would be ascertained. The limiting factors of biological reducion rate and the enhancing factors of the NOx removal process would be uncovered via the determination of the complexation rate of NO, the oxidation rate of Fe(II)EDTA, the reduction rate of [Fe(II)EDTA]NO and Fe(III)EDTA. The mass transfer-reaction mechanism in the process of chemical absorption-biological reduction would be clarified, and the key parameters which control the coupling process would be obtained. The results of this research project will provide a new thinking for the NOx removal from flue gas which is urgent to be resolved, and will offer some basic data for the industrial application of this new technology.

英文关键词： NOx；chemical absorption；bio-electrochemical reduction；mass transfer-raction；model simulation