Xi Liu, Xiaoning Ren, Yuankai Shao, Anqi Dong, Chunqing Yang, Kaixiang Li, Bingjie Zhou, Hanming Wu, Zhenguo Li
{"title":"Ru改性钯基三元催化剂中NH3产率降低的研究","authors":"Xi Liu, Xiaoning Ren, Yuankai Shao, Anqi Dong, Chunqing Yang, Kaixiang Li, Bingjie Zhou, Hanming Wu, Zhenguo Li","doi":"10.1007/s10562-024-04923-4","DOIUrl":null,"url":null,"abstract":"<div><p>Three-way catalyst (TWC) stands as the state-of-the-art technology for controlling emissions in natural gas vehicles, but its utilization can generate NH<sub>3</sub> by-product. This study proposed a novel strategy for reducing NH<sub>3</sub> emissions during three-way catalytic reaction process of Pd-based catalysts by adding Ru. Catalysts Pd/LA + Si, Pd/LA + Ru/CZLN, and Pd/LA + CZLN were fabricated through incipient wetness impregnation and mechanical ball-milling methods. Testing under simulated exhaust conditions showed that Pd/LA + Si produced high NH<sub>3</sub> levels, while Ru/CZLN addition significantly reduced NH<sub>3</sub> emissions from 330 to 20 ppm. Conversely, the addition of CZLN facilitated steam reforming and water–gas shift reactions, generating more H<sub>2</sub> for NO reduction, which led to an increase in NH<sub>3</sub> emissions. Experimental evidence confirmed that Ru/CZLN could effectively decompose NH<sub>3</sub>, which was produced over Pd/LA, into N<sub>2</sub> and H<sub>2</sub>, thereby significantly reducing NH<sub>3</sub> emissions. This study provides a promising approach for developing TWC with low NH<sub>3</sub> emissions for natural gas vehicles.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 3","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Unveiling Reduction of NH3 Production in Pd-Based Three-Way Catalyst Modified by Ru\",\"authors\":\"Xi Liu, Xiaoning Ren, Yuankai Shao, Anqi Dong, Chunqing Yang, Kaixiang Li, Bingjie Zhou, Hanming Wu, Zhenguo Li\",\"doi\":\"10.1007/s10562-024-04923-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Three-way catalyst (TWC) stands as the state-of-the-art technology for controlling emissions in natural gas vehicles, but its utilization can generate NH<sub>3</sub> by-product. This study proposed a novel strategy for reducing NH<sub>3</sub> emissions during three-way catalytic reaction process of Pd-based catalysts by adding Ru. Catalysts Pd/LA + Si, Pd/LA + Ru/CZLN, and Pd/LA + CZLN were fabricated through incipient wetness impregnation and mechanical ball-milling methods. Testing under simulated exhaust conditions showed that Pd/LA + Si produced high NH<sub>3</sub> levels, while Ru/CZLN addition significantly reduced NH<sub>3</sub> emissions from 330 to 20 ppm. Conversely, the addition of CZLN facilitated steam reforming and water–gas shift reactions, generating more H<sub>2</sub> for NO reduction, which led to an increase in NH<sub>3</sub> emissions. Experimental evidence confirmed that Ru/CZLN could effectively decompose NH<sub>3</sub>, which was produced over Pd/LA, into N<sub>2</sub> and H<sub>2</sub>, thereby significantly reducing NH<sub>3</sub> emissions. This study provides a promising approach for developing TWC with low NH<sub>3</sub> emissions for natural gas vehicles.</p><h3>Graphical Abstract</h3>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 3\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-01-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-024-04923-4\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-024-04923-4","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Unveiling Reduction of NH3 Production in Pd-Based Three-Way Catalyst Modified by Ru
Three-way catalyst (TWC) stands as the state-of-the-art technology for controlling emissions in natural gas vehicles, but its utilization can generate NH3 by-product. This study proposed a novel strategy for reducing NH3 emissions during three-way catalytic reaction process of Pd-based catalysts by adding Ru. Catalysts Pd/LA + Si, Pd/LA + Ru/CZLN, and Pd/LA + CZLN were fabricated through incipient wetness impregnation and mechanical ball-milling methods. Testing under simulated exhaust conditions showed that Pd/LA + Si produced high NH3 levels, while Ru/CZLN addition significantly reduced NH3 emissions from 330 to 20 ppm. Conversely, the addition of CZLN facilitated steam reforming and water–gas shift reactions, generating more H2 for NO reduction, which led to an increase in NH3 emissions. Experimental evidence confirmed that Ru/CZLN could effectively decompose NH3, which was produced over Pd/LA, into N2 and H2, thereby significantly reducing NH3 emissions. This study provides a promising approach for developing TWC with low NH3 emissions for natural gas vehicles.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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