{"title":"Model-Based NH3 Slip Detection for SCR + ASC System Control and OBD","authors":"Wan Chuan, Lou Diming, Wang Tiantian","doi":"10.1007/s12239-024-00125-4","DOIUrl":null,"url":null,"abstract":"<p>Since accuracy and adaptation of the closed-loop control in selective catalytic reduction (SCR) and ammonia slip catalytic (ASC) systems quite depend on the detection of ammonia (NH<sub>3</sub>), the identification of NH<sub>3</sub> slip is important in the above systems. A model-based NH<sub>3</sub> slip detection method by a brief dosing-off maneuver is proposed, which is utilizing NO<sub>x</sub> sensors’ cross-sensitivity between NH<sub>3</sub> and NO<sub>x</sub>. When the operating conditions are suitable, NH<sub>3</sub> slip detection function would trigger once the deviation of the DeNO<sub>x</sub> efficiency calculated by model and by sensor is over a limit. The NH<sub>3</sub> slip could be detected when the consumption of NH<sub>3</sub> storage exceeded a limit earlier than DeNO<sub>x</sub> efficiency below a limit. Validation test results showed this NH<sub>3</sub> slip detection function can effectively detect the NH<sub>3</sub> slip of SCR + ASC system, and immediately send out a NO<sub>x</sub> slip result if the tailpipe NO<sub>x</sub> emission exceeds the OBD limit.</p>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s12239-024-00125-4","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Since accuracy and adaptation of the closed-loop control in selective catalytic reduction (SCR) and ammonia slip catalytic (ASC) systems quite depend on the detection of ammonia (NH3), the identification of NH3 slip is important in the above systems. A model-based NH3 slip detection method by a brief dosing-off maneuver is proposed, which is utilizing NOx sensors’ cross-sensitivity between NH3 and NOx. When the operating conditions are suitable, NH3 slip detection function would trigger once the deviation of the DeNOx efficiency calculated by model and by sensor is over a limit. The NH3 slip could be detected when the consumption of NH3 storage exceeded a limit earlier than DeNOx efficiency below a limit. Validation test results showed this NH3 slip detection function can effectively detect the NH3 slip of SCR + ASC system, and immediately send out a NOx slip result if the tailpipe NOx emission exceeds the OBD limit.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
