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Catalytic Reduction of Nitrogen Oxides from Stationary PowerSources Using Methane

使用甲烷催化还原固定电源产生的氮氧化物

基本信息

批准号：
9211552
负责人：
M. Albert Vannice
金额：
$ 24.68万
依托单位：
Pennsylvania State Univ University Park
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1993
资助国家：
美国
起止时间：
1993-03-01 至 1996-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9211552&HistoricalAwards=false
关键词：
Catalytic Reduction Nitrogen Oxides Stationary

项目摘要

This project examines the feasibility of reducing emissions of nitrogen oxides from stationary power sources by including a catalytic reburn step in the process. The reburn chamber would be incorporated into the stack of a boiler or into a heat- recovery steam generator following a gas turbine, and would incorporate heterogeneous catalysts capable of generating methyl radicals from natural gas (methane) injected into the exit stream of the combustor. The ability of methyl radicals to reduce nitrogen oxides is already well established. In this study, two families of catalysts known to generate methyl radicals from methane are used: lithium-doped zinc oxide and magnesium oxide, and rare- earth oxides such as lanthana. Catalytic studies and adsorption measurements provide specific activities, activation energies, and kinetic rate expressions. Infrared spectroscopy done in situ is used to characterized the surface species on the most active catalysts. Successful application of this concept to power generating processes would result in an enormous decrease in nitrogen oxide emissions and would probably eliminate acid rain from power generation as a major environmental problem. It would also obviate the need for the more expensive and more cumbersome processes involving ammonia that are currently being used. Application to other industrial sources nitrogen oxides is also envisioned.

该项目探讨了减少温室气体排放的可行性氮氧化物从固定电源，包括一个催化再烧步骤。再燃室将并入锅炉的烟囱内或并入─ 燃气涡轮机后面的回收蒸汽发生器，并且将掺入能够产生甲基来自注入出口的天然气（甲烷）的自由基燃烧室的气流。甲基自由基减少氮氧化物的方法已经确立。在这研究表明，已知的两种催化剂可以产生甲基使用来自甲烷的自由基：掺杂锂的氧化锌，氧化镁和稀土氧化物如氧化镧。催化研究和吸附测量提供了具体的活性、活化能和动力学速率表达式。原位进行的红外光谱用于表征最活跃的催化剂上的表面物种。这一概念在发电中的成功应用这将导致氮氧化物的大量减少，排放，并可能消除酸雨从电力这是一个重大的环境问题。它还将不需要更昂贵和更笨重的目前正在使用的涉及氨的工艺。对其他工业源氮氧化物的应用也是预想的