Emission reduction characteristics of after-treatment system on natural gas engine: Effects of platinum group metal loadings and ratios

Ren, Yedi; Lou, Diming; Tan, Piqiang; Zhang, Yunhua; Sun, Xiuyun

doi:10.1016/j.jclepro.2021.126833

Cited by 23 publications

(3 citation statements)

References 31 publications

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“…6 The second group involves passive solutions to reduce pollutant compounds across the exhaust line with the use ATS. 7 For example, the three-way catalyst (TWC) allows oxidate and reduce gaseous pollutant compounds, 8 while the particle filter reduces the PM emission. 9 The fuel type has a direct influence on the pollutant compounds emergence.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the aftertreatment performance in HD-SI engine fueled with LPG

Bermúdez

Ruíz

Conde

et al. 2021

International Journal of Engine Research

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This research/article aimed to analyze the influence of an after-treatment system (ATS) on emissions of a heavy-duty spark-ignition (HD-SI) engine fueled with liquified D:\APP-SERVER\3B2\3B2AUTO\LOGO\petroleum gas (LPG), in the context of current Euro VI emissions requirements. The ATS is composed by a three-way catalyst (TWC) in series with a diesel particle filter (DPF). Emissions testing were carried out on an engine test bench according to homologation procedures, performing both world harmonized stationary cycle (WHSC) and world harmonized transient cycle (WHTC), to study the effects of the engine operating parameters on pollutant emissions behavior and ATS performance during steady and dynamic states, respectively. Instruments used were a gas analyzer Horiba MEXA ONE to measure gaseous emissions, HORIBA OBS ONE PN to measure particle matter (PM) concentration, and spectrometer TSI EEPS 3090 to measure PM concentration and particle size distribution (PSD). The results showed some important aspects such as the effects of engine speed and load on pollutant emissions formation and ATS performance, the influence of the three-way catalyst (TWC) on particulate matter (PM) reduction due to the relationship between volatile unburned hydrocarbons (UHC) and the emergence of nucleation-mode particles, stressing that ATS implementation is mandatory to meet the current emissions requirements.

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Section: Introductionmentioning

confidence: 99%

Analysis of the aftertreatment performance in HD-SI engine fueled with LPG

Bermúdez

Ruíz

Conde

et al. 2021

International Journal of Engine Research

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“…The surface is covered with metals with catalytic properties, i.e., palladium, platinum, and rhodium. Pd and Pt are responsible for the oxidation of carbon monoxide and hydrocarbons to water vapour and carbon dioxide, and Rh is responsible for the reduction of nitrogen oxides [106,107]. The typical TWC contains 1.9 g of platinum-group metals (PGMs), such as platinum, palladium, and rhodium [108].…”

Section: Comparison Of Exhaust-gas Treatment Systemsmentioning

confidence: 99%

Emissions from Light-Duty Vehicles—From Statistics to Emission Regulations and Vehicle Testing in the European Union

Pacura,

Szramowiat-Sala,

Gołaś

2023

Energies

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The article offers a comprehensive examination of vehicle emissions, with a specific focus on the European Union’s automotive industry. Its main goal is to provide an in-depth analysis of the factors influencing the emission of microcontaminants from light-duty vehicles and the challenges associated with their removal via exhaust aftertreatment systems. It presents statistical insights into the automotive sector and explores the relationships between vehicle categories, fuel types, and the emission of regulated and nonregulated pollutants, as well as relevant legal regulations such as the European Emission Standard. The article delves into the characteristics of vehicle exhaust, compares exhaust-gas aftertreatment systems, and introduces factors affecting emissions from gasoline engines, including downsizing, fuel composition, and engine operating parameters. It also considers the impact of driving style, start–stop systems, and related factors. Concluding, the article offers an overview of vehicle-testing procedures, including emission tests on dynamometer chassis and real driving emissions. With the growing global vehicle population and international environmental regulations, a focus on solid particles containing microcontaminants is paramount, as they pose significant risks to health and the environment. In summary, this article provides valuable insights into vehicle emissions, significantly contributing to our understanding of this crucial environmental issue.

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“…Lean-burn NG engines with selective catalytic reduction confront severe NOx penalties, especially in urban driving [ 4 ]. To comply with the ever-tightening regulations, stoichiometric combustion combined with a three-way catalyst (TWC) is deemed more reliable, but at the price of high addition of precious metals to account for premature failure [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Decelerating catalyst aging of natural gas engines using organic Rankine cycle under road conditions

Wang,

et al. 2024

Heliyon

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Emission reduction characteristics of after-treatment system on natural gas engine: Effects of platinum group metal loadings and ratios

Cited by 23 publications

References 31 publications

Analysis of the aftertreatment performance in HD-SI engine fueled with LPG

Analysis of the aftertreatment performance in HD-SI engine fueled with LPG

Emissions from Light-Duty Vehicles—From Statistics to Emission Regulations and Vehicle Testing in the European Union

Decelerating catalyst aging of natural gas engines using organic Rankine cycle under road conditions

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