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首页> 外文期刊>Catalysis science & technology >Control of the Cu ion species in Cu-SSZ-13 via the introduction of Co2+ co-cations to improve the NH3-SCR activity
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Control of the Cu ion species in Cu-SSZ-13 via the introduction of Co2+ co-cations to improve the NH3-SCR activity

机译：控制铜离子物种Cu-SSZ-13通过介绍二氧化碳+ co-cations改善NH3-SCR活动

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摘要

Cu-SSZ-13 has been successfully commercialized as a NOx removal catalyst for selective catalytic reduction with NH3 (NH3-SCR) in after-treatment systems. However, as global regulations on NOx emissions are becoming more stringent, the development of catalysts with higher NOx abatement ability is becoming more important. Herein, we propose a new strategy to enhance the reactivity of Cu-SSZ-13 by tuning the Cu ions in SSZ-13 zeolite. CuCo-SSZ-13 catalysts were synthesized by introducing Co2+ co-cations prior to loading Cu ions onto Cu-SSZ-13. The pre-loaded Co2+ co-cations induce the Cu ions to exist as more reactive species (Z-[Cu2+-OH-]) rather than less active species (2Z-Cu2+), which are classified by the number of adjacent framework Al atoms in SSZ-13. The designed CuCo-SSZ-13 catalysts demonstrate higher SCR reactivity than the conventional Cu-SSZ-13 catalyst under both low- and high-temperature conditions.
机译：Cu-SSZ-13已成功商业化除氮氧化物催化剂选择性催化减少与NH3 (NH3-SCR)后处理系统。排放越来越严格,与更高的氮氧化物催化剂的发展减排的能力变得越来越重要。在此,我们提出一个新的策略来提高通过调优的铜离子反应的Cu-SSZ-13SSZ-13电厂。通过引入二氧化碳合成+ co-cations之前Cu-SSZ-13上加载铜离子。二氧化碳+ co-cations促使铜离子存在更多的活性物种(Z - [Cu2 + -哦-]),而不是不太活跃的物种(2 z-cu2 +)相邻的数量分类框架在SSZ-13原子。催化剂演示SCR反应性高于传统的Cu-SSZ-13催化剂两种低收入和高温条件。

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