SBIR Phase I: High Temperature NOx Abatement Catalyst for Natural Gas Fired Power Plants

该小型企业创新研究（SBIR）第一阶段项目涉及开发一种新型高温NOx减排催化剂和催化工艺，用于控制天然气发电厂的NOx，NH3，CO和非甲烷-碳氢化合物排放。该催化剂被设计为在热回收蒸汽发生器（HRSG）的上游操作，从而在550 C和620 C之间的温度下操作。本文所述的催化方法涉及定制沸石基催化剂以在指定的温度范围内操作，并以层状床构造使用催化剂。分层床构造被设计成用过量的NH3操作，从而提高NOx减排效率。设计用于床的入口区域的催化剂负责实现NOx还原，同时使NH3分解最小化。位于床的出口区域中的催化剂被设计成还原剩余的NOx、分解过量的NH3、以及氧化CO和非甲烷烃。所述催化剂的开发将为发电工业提供满足日益严格的排放要求的简单、低成本的手段。 由于与改造和新安装相关的较低的资本成本、增加的操作效率和与废催化剂相关的减少的处置负担，预期在HRSG外部操作时能够超过排放要求的催化剂将迅速获得市场接受。

This Small Business Innovation Research (SBIR) Phase I project involves developing a novel high temperature NOx abatement catalyst and catalytic process for the control of NOx, NH3, CO and non-methane-hydrocarbon emissions from natural gas fired power plants. The catalyst is designed to be operated up-stream of the heat recovery steam generator (HRSG), thereby operating at temperatures between 550 C and 620 C. The catalytic process described herein involves tailoring a zeolite-based catalyst to operate within the specified temperature regime, and employing the catalyst in a layered bed configuration. The layered bed configuration is designed to operate with excess NH3, thereby increasing NOx abatement efficiency. The catalyst designed for the inlet region of the bed is responsible for achieving NOx reduction with minimal NH3 decomposition. The catalyst located in the outlet region of the bed is designed to reduce the remaining NOx, decompose the excess NH3, and oxidize CO and non-methane hydrocarbons. Development of said catalyst will provide the power generation industry with a simple, low cost means of meeting increasingly stringent emissions requirements. A catalyst capable of exceeding emissions requirements while operating outside the HRSG is expected to rapidly gain market acceptance due to lower capital costs associated with retrofit and new installation, increased operating efficiency, and reduced disposal burdens associated with the spent catalyst.