纳米Cu-Zr/CeO2催化剂上转炉放散煤气自持催化燃烧的微观反应机理及稳燃机制研究

钢铁企业是国家节能减排工作开展的重点对象之一。本项目针对转炉煤气引燃放散造成的大气污染和能源浪费问题，首次提出采用自持催化燃烧方法实现放散煤气中CO的高效转化，以达到提高转炉煤气化学热回收、减少环境污染的目的。项目基于纳米Cu-Zr/CeO2催化剂，围绕CO自持催化燃烧技术中的基础理论问题开展研究，旨在从纳米层次明确Cu-Zr/CeO2催化剂组成-结构-表/界面性质-催化性能之间的构效关系，建立CO自持催化燃烧过程中反应物、活性位及中间物种对反应贡献度的定性定量分析方法，推动CO催化燃烧微观反应机理的认识，由本征反应动力学阶段向自持催化燃烧阶段拓展；通过CO自持催化燃烧可操作域的考察及参数敏感性判据的建立，为反应系统的优化设计与稳定运行提供理论依据。研究结果为促进转炉放散煤气从所需燃气引燃到自身能量回收利用的双向节能奠定基础，有利于促进钢铁企业节能减排事业的蓬勃发展。

Converter steelmaking is of great importance for national energy-saving and emission-reduction work. In order to enhance the recovery of chemical heat from the off-gas and reduce the environmental pollution, the self-sustained catalytic combustion method is proposed firstly to realize the CO conversion efficiently in this project. The purposes of this project focus on CO self-sustained combustion over nano Cu-Zr/CeO2 catalyst to obtain the structure-activity relationships from the nanometer level of catalyst, establish quantitative analysis methods of CO reactants, active species and the intermediate species contributing to CO conversion, expand the understanding about microscopic reaction mechanism from intrinsic reaction kinetics stage to self-sustained catalytic combustion stage. The operational domain and parameter sensitivity criterion in the system of CO self-sustained catalytic combustion will be also investigated, which is beneficial to designing reaction system for stable operation and thus enriching the safety control theory of CO catalytic combustion. The research results obtained will transform the off-gas treatment from the ignition induced by methane to own energy recycling, which is favor to realize bidirectional energy saving, and hence facilitate the development of energy-saving and emission-reduction in converter steelmaking.