Effect of Promoters (Co, Cr, Fe, Zr) on the Performance of MnO2/CeO2 Catalysts for NO Reduction at Low Temperatures Using NH3-SCR

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Surveys from Asia Pub Date : 2023-12-07 DOI:10.1007/s10563-023-09416-9

Shyam Sunder Rao, Sweta Sharma

{"title":"Effect of Promoters (Co, Cr, Fe, Zr) on the Performance of MnO2/CeO2 Catalysts for NO Reduction at Low Temperatures Using NH3-SCR","authors":"Shyam Sunder Rao, Sweta Sharma","doi":"10.1007/s10563-023-09416-9","DOIUrl":null,"url":null,"abstract":"<div>This study examined the effect of various promoters (Co, Cr, Fe, Zr) in reducing NO using the NH3-SCR reaction on the MnO2/CeO2-Nanorod catalysts. The physicochemical properties of these catalysts were characterized using Brunauer–Emmett–Teller, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscope, scanning electron microscope-energy dispersive X-ray spectroscopy, and Raman spectroscopy. Characterization analysis revealed uniform dispersion of active metals on CeO2-Nanorod supports, desired active metal-support synergism, small crystallite sizes, high specific surface areas, and an appreciable amount of surface lattice oxygen in Co–MnO2/CeO2-Nanorod catalysts. Co–MnO2/CeO2-Nanorod catalyst showed the best NH3-SCR activity at low temperatures. The NO conversion and N2 selectivity are 87 and 85%, respectively, at 300 °C with excellent stability. The Co–MnO2/CeO2-Nanorod catalyst also showed excellent tolerance against the H2O and the SO2. The catalyst’s performance can be attributed to its high surface area, oxygen storage capacity, high Ce3+ content, and evenly distributed promoters.</div>","PeriodicalId":509,"journal":{"name":"Catalysis Surveys from Asia","volume":"28 1","pages":"88 - 100"},"PeriodicalIF":2.1000,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Surveys from Asia","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10563-023-09416-9","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This study examined the effect of various promoters (Co, Cr, Fe, Zr) in reducing NO using the NH₃-SCR reaction on the MnO₂/CeO₂-Nanorod catalysts. The physicochemical properties of these catalysts were characterized using Brunauer–Emmett–Teller, X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscope, scanning electron microscope-energy dispersive X-ray spectroscopy, and Raman spectroscopy. Characterization analysis revealed uniform dispersion of active metals on CeO₂-Nanorod supports, desired active metal-support synergism, small crystallite sizes, high specific surface areas, and an appreciable amount of surface lattice oxygen in Co–MnO₂/CeO₂-Nanorod catalysts. Co–MnO₂/CeO₂-Nanorod catalyst showed the best NH₃-SCR activity at low temperatures. The NO conversion and N₂ selectivity are 87 and 85%, respectively, at 300 °C with excellent stability. The Co–MnO₂/CeO₂-Nanorod catalyst also showed excellent tolerance against the H₂O and the SO₂. The catalyst’s performance can be attributed to its high surface area, oxygen storage capacity, high Ce³⁺ content, and evenly distributed promoters.

Abstract Image

查看原文本刊更多论文

促进剂（Co、Cr、Fe、Zr）对 MnO2/CeO2 催化剂在低温下利用 NH3-SCR 还原 NO 性能的影响

本研究考察了各种促进剂（Co、Cr、Fe、Zr）在 MnO2/CeO2-Nanorod 催化剂上利用 NH3-SCR 反应还原 NO 的效果。使用布鲁瑙尔-艾美特-泰勒、X 射线衍射、X 射线光电子能谱、透射电子显微镜、扫描电子显微镜-能量色散 X 射线光谱和拉曼光谱对这些催化剂的理化性质进行了表征。表征分析表明，Co-MnO2/CeO2-Nanorod 催化剂中的活性金属在 CeO2-Nanorod 载体上均匀分散，活性金属与载体之间具有理想的协同作用，结晶尺寸小，比表面积高，表面晶格氧含量可观。Co-MnO2/CeO2-Nanorod 催化剂在低温下表现出最佳的 NH3-SCR 活性。在 300 °C 下，NO 转化率和 N2 选择性分别为 87% 和 85%，且稳定性极佳。Co-MnO2/CeO2-Nanorod 催化剂对 H2O 和 SO2 的耐受性也很好。催化剂的性能得益于其高表面积、储氧能力、高 Ce3+ 含量和均匀分布的促进剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Catalysis Surveys from Asia 化学-物理化学

CiteScore

4.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.