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De-NOx Performance of HC-SCR System Combining Ag/Al₂O₃ and Pd/Al₂O₃ Catalysts
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논문 기본 정보

Type
Proceeding
Author
Kyungseok Lee (Chonnam National University) Byungchul Choi (Chonnam National University) Chunbeom Lee (Korea Automotive Technology Institute) Kwangchul Oh (Korea Automotive Technology Institute) Choongkil Seo (Howon University)
Journal
The Korean Society Of Automotive Engineers 한국자동차공학회 춘계학술대회 KSAE 2021 Annual Spring Conference
Published
2021.6
Pages
71 - 71 (1page)

Usage

cover
📌
Topic
본 연구는 Ag/Al2O3 및 Pd/Al2O3 촉매를 결합한 HC-SCR 시스템의 De-NOx 성능을 평가하는 것을 목표로 한다.
📖
Background
현재 디젤 차량의 NOx 저감을 위한 주요 기술은 urea-SCR이지만, 이 시스템은 요소 동결, 높은 운영 비용 및 NH3 누출과 같은 단점이 있다.
🔬
Method
Ag- 및 Pd 기반 촉매를 γ-Al2O3에 지지하여 결합된 HC-SCR 시스템을 개발하고, 저온에서의 De-NOx 성능, 환원제 누출 억제, 최적 촉매 배열 및 수소 보조 HC-SCR 과정에서의 수열 열화 효과를 분석하였다.
🏆
Result
결합된 SCR 시스템(부피 비율 = 80% (Ag/Al2O3):20% (Pd/Al2O3))은 넓은 반응 온도 범위에서 NOx, C3H6, CO 및 H2의 동시 저감을 가능하게 하였다.
De-NOx Performance of HC-SCR System Combining Ag/Al₂O₃ and Pd/Al₂O₃ Catalysts
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Recent commercial after-treatment technology for NOx abatement relies heavily on active phases by specific catalysis in a catalytic converter. Although urea-SCR is currently the leading technology for NOx reduction from diesel vehicles, this system has some drawbacks, including urea freezing, high running costs, and NH<SUB>3</SUB> slip. Thus, alternative SCR system are required to comply with upcoming emission standards. In the present study, we developed a novel concept of a combined HC-SCR system with silver (Ag)- and palladium (Pd)-based catalysts supported on γ-Al<sub>2</sub>O<SUB>3</SUB>, focusing on the enhanced low-temperature de-NOx performance, suppression of reductant slip (HC, H<SUB>2</SUB>, and CO), optimal catalytic arrangement, and effect of hydrothermal aging in the H<SUB>2</SUB>-assisted HC-SC ... View All
#H₂-C₃H₆-SCR #Hydrocarbon-selective catalytic reduction (HC-SCR) #Combined SCR system #Hydrothermal aging #Reductant slip #De-NOx

AI Summary

Topic

본 연구는 Ag/Al2O3 및 Pd/Al2O3 촉매를 결합한 HC-SCR 시스템의 De-NOx 성능을 평가하는 것을 목표로 한다.

Background

현재 디젤 차량의 NOx 저감을 위한 주요 기술은 urea-SCR이지만, 이 시스템은 요소 동결, 높은 운영 비용 및 NH3 누출과 같은 단점이 있다.

Method

Ag- 및 Pd 기반 촉매를 γ-Al2O3에 지지하여 결합된 HC-SCR 시스템을 개발하고, 저온에서의 De-NOx 성능, 환원제 누출 억제, 최적 촉매 배열 및 수소 보조 HC-SCR 과정에서의 수열 열화 효과를 분석하였다.

Result

결합된 SCR 시스템(부피 비율 = 80% (Ag/Al2O3):20% (Pd/Al2O3))은 넓은 반응 온도 범위에서 NOx, C3H6, CO 및 H2의 동시 저감을 가능하게 하였다.

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