基于酸改性矿渣粉载体的Cu/KZS和Ce-Cu/KZS催化剂低温SCR脱硝性能
Low-temperature SCR Denitration Performance of Cu/KZS and Ce-Cu/KZS Catalysts Based on Acid-modified Slag Powder Support
王晓波 1唐玲玲 1张小雪 1徐慎泽1
作者信息
- 1. 南京晓庄学院环境科学学院,江苏南京 211171
- 折叠
摘要
本文以酸洗改性的矿渣粉为载体,制备了 Cu/KZS和Ce-Cu/KZS催化剂,并考察了其低温SCR脱硝性能.实验结果表明Ce-Cu/KZS催化剂展现了更优的低温催化脱硝性能,在180～300℃范围,可以实现超过93％的催化脱硝活性.表征结果发现,其优越的低温催化活性得益于其具有更高的比表面积、较弱的活性物种结晶度、更强的低温氧化还原性能和更高的弱酸性位数量;同时,Ce-Cu/KZS催化剂的表面吸附氧含量更高,也会提高催化剂的催化活性.
Abstract
In this work,slag powder was modified by acid washing and used as support to prepare Cu/KZS and Ce-Cu/KZS catalysts.These catalysts were utilized for low-temperature SCR reaction and their denitration performance was investigated.The experimental results show that the Ce-Cu/KZS catalyst exhibits better low-temperature cata-lytic performance than the Cu/KZS catalyst.More than 93％NOx conversion can be achieved over the Ce-Cu/KZS catalyst in a range of 180～300 ℃.The characterization results reveal that this is mainly due to its higher specific surface area,weaker crystallinity of active species,the stronger low-temperature redox properties and more amount of weak acid.Besides these,the Ce-Cu/KZS catalyst has higher content of surface adsorbed oxygen,which can promote its catalytic activity as well.
关键词
矿渣粉/酸改性/脱硝/SCRKey words
slag powder/acid modification/denitration/SCR引用本文复制引用
出版年
2024
NETL
NSTL
万方数据