Effects of air/fuel ratio on gas emissions in a small spark-ignited non-road engine operating with different gasoline/ethanol blends

Schirmer, Waldir Nagel; Olanyk, Luciano Zart; Guedes, Carmen Luı́sa Barbosa; Quessada, Talita Pedroso; Ribeiro, Camilo Bastos; Capanema, Marlon André

doi:10.1007/s11356-017-9651-8

Cited by 27 publications

(12 citation statements)

References 9 publications

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“…The TOF is defined as the reaction rate per surface site. The reaction is explored at pressures relevant for a stoichiometric combustion engine, i.e., p(CO) = 20 mbar and p(O 2 ) = 10 mbar 52 , 53 . To uncover how different types of sites contribute to the total activity, the total TOF is separated into contributions from corner, edge, {100} and {111} sites.…”

Section: Resultsmentioning

confidence: 99%

Influence of atomic site-specific strain on catalytic activity of supported nanoparticles

et al. 2018

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Heterogeneous catalysis is an enabling technology that utilises transition metal nanoparticles (NPs) supported on oxides to promote chemical reactions. Structural mismatch at the NP–support interface generates lattice strain that could affect catalytic properties. However, detailed knowledge about strain in supported NPs remains elusive. We experimentally measure the strain at interfaces, surfaces and defects in Pt NPs supported on alumina and ceria with atomic resolution using high-precision scanning transmission electron microscopy. The largest strains are observed at the interfaces and are predominantly compressive. Atomic models of Pt NPs with experimentally measured strain distributions are used for first-principles kinetic Monte Carlo simulations of the CO oxidation reaction. The presence of only a fraction of strained surface atoms is found to affect the turnover frequency. These results provide a quantitative understanding of the relationship between strain and catalytic function and demonstrate that strain engineering can potentially be used for catalyst design.

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Section: Resultsmentioning

confidence: 99%

Influence of atomic site-specific strain on catalytic activity of supported nanoparticles

et al. 2018

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“…High CO emission from the gas engine was due to incomplete combustion which in turn caused by rich airfuel mixture ratio (Schirmer et al, 2017). Figure 7 shows the CO emission from the gas engine operated on producer gas from MSW briquette fuel and charcoal.…”

Section: Co and Hc Emissionsmentioning

confidence: 99%

Performance investigation of a gasifier and gas engine system operated on municipal solid waste briquettes

Homdoung

Dussadee

Sasujit

et al. 2019

Int. J. Renew. Energy Dev.

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Municipal solid waste (MSW) and charcoal can be used as a substitute fuel in a gas engine. In this work, performance of a downdraft gasifier and gas engine system operated on MSW briquette fuel was investigated. Experimental test was carried out on a 62 kW, four-cylinder, naturally aspirated engine coupled to a 20 kW dynamometer. The downdraft gasifier was used to generate producer gas from MSW briquettes and charcoal. The engine load was varied between 1.5-9.0 kW. Biomass consumption, producer gas production, cold gas efficiency, thermal efficiency of the gas engine, carbon monoxide (CO), hydrocarbon (HC) emissions and exhaust temperature were evaluated. The MSW briquette fuelled operation was compared against that with charcoal. It was found that, the use of MSW briquette led to lowering performance of the downdraft gasifier and gas engine system, in comparison with the use of charcoal. Maximum cold gas and thermal efficiencies obtained were 64.6% and 16% at 4.5 kW and 9 kW loading, respectively. The CO and HC emissions of the gas engine operated on MSW briquettes were higher than that on charcoal, while the exhaust temperatures were similar. ©2019. CBIORE-IJRED. All rights reserved

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“…λ is the feedback signal for AFR regulator in this study. It is the ratio of actual AFR to stoichiometry for a given mixture 1,2,32–36…”

Section: Afr Dynamicsmentioning

confidence: 99%

Intelligent air/fuel ratio control strategy with a PI-like fuzzy knowledge–based controller for gasoline direct injection engines

Zhou

Zhang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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This paper proposes a new concept of PI-like fuzzy knowledge–based controller with self-tuning capability, high robustness and rapid development capability to regulate air/fuel ratio for gasoline direct injection engines. The proportional and integral terms of the PI-like fuzzy knowledge–based controller are nonlinear functions of the input signals and self-tuned in real time at operation points, which can reduce the effort spent on calibrating controller parameters. The PI-like fuzzy knowledge–based controller is implemented on a production gasoline direct injection engine and evaluated through case studies. The experimental results show that the proposed controller can regulate air/fuel ratio at stoichiometric value with less settling time and less oscillation compared with the conventional Proportional-Integral (PI) controller for transient operation.

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Effects of air/fuel ratio on gas emissions in a small spark-ignited non-road engine operating with different gasoline/ethanol blends

Cited by 27 publications

References 9 publications

Influence of atomic site-specific strain on catalytic activity of supported nanoparticles

Influence of atomic site-specific strain on catalytic activity of supported nanoparticles

Performance investigation of a gasifier and gas engine system operated on municipal solid waste briquettes

Intelligent air/fuel ratio control strategy with a PI-like fuzzy knowledge–based controller for gasoline direct injection engines

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