低温等离子体技术协同光催化降解硫化氢臭气  

Low-temperature plasma technology synergisticphotocatalytic degradation of hydrogen sulfide

作　　者：梁旭 周伟[1] 顾京雪 刘寅欣 沈欣军[1] Liang Xu;Zhou Wei;Gu Jingxue;Liu Yinxin;Shen Xinjun(School of Environmental and Chemical Engineering,Shenyang University of Technology,Shenyang 110870,Liaoning,China)

机构地区：[1]沈阳工业大学环境与化学工程学院,辽宁沈阳110870

出　　处：《工业催化》2021年第7期35-41,共7页Industrial Catalysis

基　　金：沈阳市科技计划项目(20-206-4-01);辽宁省2020年度科学研究项目(LFGD2020001);辽宁省“百千万人才工程”资助项目(2018921006);辽宁省“兴辽英才计划”项目(XLYC1908034)。

摘　　要：臭气是低浓度和多成分的气体物质,人的嗅觉非常灵敏,能感知极低的恶臭污染物浓度。恶臭物质的嗅阈值极低,通常在不到10-6级的低浓度时,臭气使人感到不愉快和厌恶,并对人体健康产生危害。将含硫化氢的臭气使用低温等离子体技术协同不同基体的二氧化钛催化剂对其进行降解研究。采用自制线-管式双介质阻挡放电反应器并协同两种不同基体的二氧化钛催化剂(TiO_(2)/UV光解铝基网和TiO_(2)/UV光解聚氨酯泡沫网),并采用一段式、两段式协同系统对模拟硫化氢气体进行降解实验研究。对自制反应器的能量密度进行测定,考察不同输入电压、气体流量和初始浓度对硫化氢去除效率的影响,对系统产生的臭氧进行分析。结果表明,反应过程中,放电产生的臭氧对硫化氢分解起一定作用;随着反应器输入电压增大,模拟硫化氢气体的初始浓度和流量较小,硫化氢气体降解率增大;相比于单独使用低温等离子体技术,协同催化剂的不同反应系统中硫化氢降解率得到明显提升。Odor is a low-concentration,multi-component gas material.The human sense of smell is very sensitive,can perceive very low odor pollutant concentration.Odour substances have very low smell threshold,usually in less than 10-6 levels of low concentration.Odour makes people feel unpleasant and aversive,and cause harm to human health.Degradation of the odour containing hydrogen sulfide was studied by using low temperature plasma technology and TiO_(2) catalysts with different substrates.In this paper,a self-made linear and tubular dual dielectric barrier discharge reactor was used,and two kinds of TiO_(2) catalysts with different substrates(TiO_(2)/UV photolysis aluminum matrix mesh and TiO_(2)/UV photolysis polyurethane foam mesh)were coordinated.A one-stage and two-stage synergistic system was used to conduct experimental research on the degradation of simulated hydrogen sulfide gas.The energy density of the self-made reactor was measured,and the effects of different input voltage,gas flow rate and initial concentration on the removal efficiency of hydrogen sulfide were investigated.The ozone produced by the system was analyzed.The results show that the ozone produced by the discharge plays a certain role in the decomposition of hydrogen sulfide.With the increase of the reactor input voltage,the initial concentration and flow rate of simulated hydrogen sulfide gas are small,and the degradation rate of hydrogen sulfide gas increases.Compared with the low-temperature plasma technology alone,the degradation rate of hydrogen sulfide in different reaction systems with synergistic catalysts was significantly improved.

关 键 词：环境保护工程 低温等离子体 能量密度 光催化剂 硫化氢 臭氧 影响因素 

分 类 号：TQ034[化学工程] X701[环境科学与工程—环境工程]