环境工程学报2026，Vol.20Issue(1)：167-176,10.DOI:10.12030/j.cjee.202503138
低温烟气中氮氧化物的吸收转化和资源化利用
The absorption,transformation and resource utilization of nitrogen oxides in low-temperature flue gas
摘要
Abstract
Nitrogen oxides(NOx)are major contributors to air pollution,posing serious threats to the ecological environment and human health.With the development of new energy and the adjustment of energy structure,the operation of gas turbine units at low load has become the norm.The temperature of the exhaust gas(<180℃)does not match the temperature window of SCR technology,which hinders the further reduction of NOx emissions.If low-temperature and efficient technologies can be developed and NOx can be utilized resourcefully,it will not only reduce current air pollution but also generate certain economic benefits.Based on the traditional low-temperature wet flue gas denitrification technology,this experiment formed three innovative technologies:Low-temperature solid-phase liquid membrane denitrification for exhaust gas,electro-catalytic reduction of nitrate waste water to produce ammonia,and rapid microwave enrichment of low-concentration ammonia water.A system for NOx exhaust gas denitrification and resource utilization under low-load conditions of gas turbine units was designed,achieving the conversion of NOx exhaust gas→nitrate wastewater→ammonia.The NOx absorption efficiency of this system could reach 82.7%,and the Faraday efficiency was 80.0%.The ammonia production rate was 0.76 mmol·h−1·cm−2,and the microwave desorption rate after electro-catalytic ammonia production could reach 97%.The experiment had achieved multi-level waste reduction and multi-link energy saving,providing a solution for NOx exhaust gas denitrification under low-load conditions of gas turbine units.关键词
氮氧化物/低温脱硝/电还原/氨气/微波解吸Key words
nitrogen oxides/low-temperature denitration/electroreduction/ammonia/microwave desorption分类
资源环境引用本文复制引用
杨茗,吕雅琳,干皓羽,李伟华,毛婷婷,柯权力,周瑛..低温烟气中氮氧化物的吸收转化和资源化利用[J].环境工程学报,2026,20(1):167-176,10.基金项目
浙江省大学生科技创新活动计划(新苗人才计划)资助项目(G24201010001) （新苗人才计划）
浙江省基础公益技术资助项目(LTGS24E080008) （LTGS24E080008）
