【摘要】 环保意识和污染物排放标准的提高,使天然气汽车尾气减排成为了亟待解决的问题.催化氧化被认为是消除稀燃天然气汽车尾气中强温室效应气体甲烷最为有效的途径之一,而Pd催化剂被认为是甲烷低温氧化的首选催化剂.通过对Pd催化剂制备中的前驱体、载体、助剂、制备方法各制备要素综述,总结了各要素对催化剂低温氧化活性、稳定性和抗硫中毒性能的影响,并系统介绍了Pd催化剂制备的最新发展.基于对当前研究的认识,提出了开发低成本高性能催化剂的措施.更多还原

【Abstract】 With the improvement of environmental awareness and increasingly stringent regulations,to reduce the emissions of natural gas vehicles has become a widespread consensus. Catalytic oxidation is considered to be one of the most effective way for the purification of strong greenhouse gas methane which comes from the lean-burn natural gas vehicles. And the Pd based catalysts are the most active ones in oxidation reaction of methane under low temperature. In this thesis,preparation factors of Pd catalysts were reviewed,such as precursors,carriers,additives,preparation method. Factors influence on low-temperature oxidation activity,hydrothermal stability and resistance to sulfur poisoning performance were summarized. The latest development of Pd catalysts were systematically introduced. Based on current technology,new measures for developing low cost and high performance catalysts were raised.更多还原