The Experts below are selected from a list of 21123 Experts worldwide ranked by ideXlab platform
Stanislav V Bohac - One of the best experts on this subject based on the ideXlab platform.
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Particulate Matter Emission comparison from conventional and premixed low temperature combustion with diesel biodiesel and biodiesel ethanol fuels
Fuel, 2013Co-Authors: Jianye Su, Stanislav V BohacAbstract:Abstract As worldwide energy and environmental pressures increase, interest in biofuels such as biodiesel and ethanol, and low Emission diesel combustion modes such as premixed low temperature combustion (LTC), continues to grow. This study takes a detailed look at Particulate Matter (PM) from a single cylinder common rail diesel engine operated under conventional and premixed LTC combustion modes with diesel, biodiesel and biodiesel–ethanol fuels. Soot, particle number and particle size distribution are investigated. Experiments show that for conventional combustion, accumulation mode Particulates are reduced by biodiesel and reduced further by biodiesel-E20 (20% ethanol by volume). The reduction is attributed to higher fuel oxygen content, lower stoichiometric air–fuel ratio and reduced aromatic content reducing carbonaceous soot. Nucleation mode particles from conventional combustion with diesel, biodiesel and biodiesel-E20 fuels show similar size distributions. For premixed LTC, biodiesel shifts the accumulation mode size distribution curve upwards (i.e., more particles) and towards smaller size particles relative to diesel. In LTC, biodiesel produces more semi-volatile organic carbon and lower soot. The shift in size distribution for biodiesel may be caused by more semi-volatile organic carbon in the exhaust causing an increase in the growth of particles nucleated from volatile species, and less soot leading to a reduction in the number of large carbonaceous agglomerates. Biodiesel-E20 decreases accumulation mode particles of all sizes by reducing soot and the amount of biodiesel-derived semi-volatile organic carbon available for growing particles. Biodiesel increases LTC nucleation mode particles relative to diesel. Biodiesel-E20 increases the amount of small nucleation particles (
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Particulate Matter Emission comparison from conventional and premixed low temperature combustion with diesel biodiesel and biodiesel ethanol fuels
Fuel, 2013Co-Authors: Haoyue Zhu, Stanislav V BohacAbstract:Abstract As worldwide energy and environmental pressures increase, interest in biofuels such as biodiesel and ethanol, and low Emission diesel combustion modes such as premixed low temperature combustion (LTC), continues to grow. This study takes a detailed look at Particulate Matter (PM) from a single cylinder common rail diesel engine operated under conventional and premixed LTC combustion modes with diesel, biodiesel and biodiesel–ethanol fuels. Soot, particle number and particle size distribution are investigated. Experiments show that for conventional combustion, accumulation mode Particulates are reduced by biodiesel and reduced further by biodiesel-E20 (20% ethanol by volume). The reduction is attributed to higher fuel oxygen content, lower stoichiometric air–fuel ratio and reduced aromatic content reducing carbonaceous soot. Nucleation mode particles from conventional combustion with diesel, biodiesel and biodiesel-E20 fuels show similar size distributions. For premixed LTC, biodiesel shifts the accumulation mode size distribution curve upwards (i.e., more particles) and towards smaller size particles relative to diesel. In LTC, biodiesel produces more semi-volatile organic carbon and lower soot. The shift in size distribution for biodiesel may be caused by more semi-volatile organic carbon in the exhaust causing an increase in the growth of particles nucleated from volatile species, and less soot leading to a reduction in the number of large carbonaceous agglomerates. Biodiesel-E20 decreases accumulation mode particles of all sizes by reducing soot and the amount of biodiesel-derived semi-volatile organic carbon available for growing particles. Biodiesel increases LTC nucleation mode particles relative to diesel. Biodiesel-E20 increases the amount of small nucleation particles (
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Particulate Matter Emission comparison of spark ignition direct injection sidi and port fuel injection pfi operation of a boosted gasoline engine
Journal of Engineering for Gas Turbines and Power-transactions of The Asme, 2013Co-Authors: Weiyang Lin, Jeff Sterniak, Stanislav V BohacAbstract:Spark ignition direct injection (SIDI) gasoline engines, especially in downsized boosted engine platforms, are increasing their market share relative to port fuel injection (PFI) engines in U.S., European and Chinese vehicles due to better fuel economy by enabling higher compression ratios and higher specific power output. However, Particulate Matter (PM) Emissions from engines are becoming a concern due to adverse human health and environment effects, and more stringent Emission standards. To conduct a PM number and size comparison between SIDI and PFI systems, a 2.0 L boosted gasoline engine has been equipped and tested with both systems at different loads, air fuel ratios, spark timings, fuel pressures and injection timings for SIDI operation and loads, air fuel ratios and spark timings for PFI operation.Regardless of load, air fuel ratio, spark timing, fuel pressure, and injection timing, particle size distribution from SIDI and PFI is shown to be bimodal, exhibiting nucleation and accumulation mode particles. SIDI produces particle numbers that are an order of magnitude greater than PFI. Particle number can be reduced by retarding spark timing and operating the engine lean, both for SIDI and PFI operation. Increasing fuel injection pressure and optimizing injection timing with SIDI also reduces PM Emissions. This study provides insight into the differences in PM Emissions from boosted SIDI and PFI engines and an evaluation of PM reduction potential by varying engine operating parameters in boosted SIDI and PFI gasoline engines.Copyright © 2013 by ASME
Hanping Chen - One of the best experts on this subject based on the ideXlab platform.
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mitigation of ultrafine Particulate Matter Emission from agricultural biomass pellet combustion by the additive of phosphoric acid modified kaolin
Renewable Energy, 2021Co-Authors: Wei Cheng, Haiping Yang, Wennan Zhang, Youjian Zhu, Jingai Shao, Hao Jiang, Zhen Huang, Hanping ChenAbstract:Abstract The Emission of ultrafine Particulate Matter (PM0.2) originated from the agricultural biomass pellet combustion poses great threat to atmospheric environment and human health, which restricts its large-scale utilization. In this study, a new phosphoric acid modification method is proposed to improve the PM0.2 reduction efficiency by kaolin additive. The effects of phosphoric acid concentration and treatment time on the physicochemical properties of kaolin and on the mitigation of PM0.2 Emission from the pellet combustion are investigated. Results indicate that phosphoric acid modification destroy the internal structure of kaolin by the leaching of Al cations and the formation of active free silica. Meanwhile, the pore structure increases after modification with residual P deposited on the surface, which results in better alkali capture ability of modified kaolin. With the addition of phosphoric acid modified kaolin, significant reduction of PM0.2 Emission can be achieved and the reduction ratio is proportional to the acid concentration. The maximum PM0.2 Emission reduction ratio reaches 64.5% for the kaolin additive modified by 12 mol/L phosphoric acid for 6 hours. Finally, the PM0.2 reduction mechanism is proposed based on the analysis results, which provides technical knowhow for the industrial application of agricultural biomass pellet combustion.
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effects of combined torrefaction and pelletization on Particulate Matter Emission from biomass pellet combustion
Energy & Fuels, 2019Co-Authors: Jingai Shao, Haiping Yang, Wei Yang, Wei Cheng, Youjian Zhu, Jiyuan Fan, Heng Liu, Hanping ChenAbstract:Combined torrefaction and pelletization can effectively improve the quality of the biomass fuel. In this work, Particulate Matter (PM) Emissions from combustion of corn stalk pellets derived from t...
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effect of minerals and binders on Particulate Matter Emission from biomass pellets combustion
Applied Energy, 2018Co-Authors: Wei Yang, Huiying Sang, Hanshen Xu, Haiping Yang, Wei Cheng, Hanping ChenAbstract:Abstract In this study, the effect of minerals and binders on the Emission characteristics of Particulate Matter (PM) from biomass pellets combustion is investigated using a fixed bed combustor combined with a Dekati low pressure impactor (DLPI). It was found that densification reduced PM Emission as the pellets hindered the release of alkali metals in comparison to the bulk biomass. The generation of PM1 was mainly due to the homogeneous condensation and heterogeneous coagulation of alkali chlorides and sulfates. Alkaline earth metals and Si played a dominant role in the formation of PM10. Diatomite in mineral additives could effectively reduce the Emission of PM1, while the binders showed no inhibitory effect on the PM Emission. Composite additives prepared with carboxymethyl cellulose (CMC) and diatomite showed a positive synergistic effect in reducing the Emissions of PM1 with the optimum CMC/diatomite ratio of 1:4. The results showed that composite additives of minerals and binders are excellent choices for the industrial production of biomass pellets from the view of increasing pellet quality and reducing PM Emission.
Jianye Su - One of the best experts on this subject based on the ideXlab platform.
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Particulate Matter Emission comparison from conventional and premixed low temperature combustion with diesel biodiesel and biodiesel ethanol fuels
Fuel, 2013Co-Authors: Jianye Su, Stanislav V BohacAbstract:Abstract As worldwide energy and environmental pressures increase, interest in biofuels such as biodiesel and ethanol, and low Emission diesel combustion modes such as premixed low temperature combustion (LTC), continues to grow. This study takes a detailed look at Particulate Matter (PM) from a single cylinder common rail diesel engine operated under conventional and premixed LTC combustion modes with diesel, biodiesel and biodiesel–ethanol fuels. Soot, particle number and particle size distribution are investigated. Experiments show that for conventional combustion, accumulation mode Particulates are reduced by biodiesel and reduced further by biodiesel-E20 (20% ethanol by volume). The reduction is attributed to higher fuel oxygen content, lower stoichiometric air–fuel ratio and reduced aromatic content reducing carbonaceous soot. Nucleation mode particles from conventional combustion with diesel, biodiesel and biodiesel-E20 fuels show similar size distributions. For premixed LTC, biodiesel shifts the accumulation mode size distribution curve upwards (i.e., more particles) and towards smaller size particles relative to diesel. In LTC, biodiesel produces more semi-volatile organic carbon and lower soot. The shift in size distribution for biodiesel may be caused by more semi-volatile organic carbon in the exhaust causing an increase in the growth of particles nucleated from volatile species, and less soot leading to a reduction in the number of large carbonaceous agglomerates. Biodiesel-E20 decreases accumulation mode particles of all sizes by reducing soot and the amount of biodiesel-derived semi-volatile organic carbon available for growing particles. Biodiesel increases LTC nucleation mode particles relative to diesel. Biodiesel-E20 increases the amount of small nucleation particles (
Haoyue Zhu - One of the best experts on this subject based on the ideXlab platform.
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Particulate Matter Emission comparison from conventional and premixed low temperature combustion with diesel biodiesel and biodiesel ethanol fuels
Fuel, 2013Co-Authors: Haoyue Zhu, Stanislav V BohacAbstract:Abstract As worldwide energy and environmental pressures increase, interest in biofuels such as biodiesel and ethanol, and low Emission diesel combustion modes such as premixed low temperature combustion (LTC), continues to grow. This study takes a detailed look at Particulate Matter (PM) from a single cylinder common rail diesel engine operated under conventional and premixed LTC combustion modes with diesel, biodiesel and biodiesel–ethanol fuels. Soot, particle number and particle size distribution are investigated. Experiments show that for conventional combustion, accumulation mode Particulates are reduced by biodiesel and reduced further by biodiesel-E20 (20% ethanol by volume). The reduction is attributed to higher fuel oxygen content, lower stoichiometric air–fuel ratio and reduced aromatic content reducing carbonaceous soot. Nucleation mode particles from conventional combustion with diesel, biodiesel and biodiesel-E20 fuels show similar size distributions. For premixed LTC, biodiesel shifts the accumulation mode size distribution curve upwards (i.e., more particles) and towards smaller size particles relative to diesel. In LTC, biodiesel produces more semi-volatile organic carbon and lower soot. The shift in size distribution for biodiesel may be caused by more semi-volatile organic carbon in the exhaust causing an increase in the growth of particles nucleated from volatile species, and less soot leading to a reduction in the number of large carbonaceous agglomerates. Biodiesel-E20 decreases accumulation mode particles of all sizes by reducing soot and the amount of biodiesel-derived semi-volatile organic carbon available for growing particles. Biodiesel increases LTC nucleation mode particles relative to diesel. Biodiesel-E20 increases the amount of small nucleation particles (
Weiping Pan - One of the best experts on this subject based on the ideXlab platform.
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fine Particulate Matter Emission and size distribution characteristics in an ultra low Emission power plant
Fuel, 2016Co-Authors: Zifeng Sui, Yongsheng Zhang, Yue Peng, Pauline Norris, Yan Cao, Weiping PanAbstract:Abstract The pollution emitted by power plants is a continuing environmental problem around the world. Recently, China has proposed new regulations limiting Emissions. The new regulations include a reduction in Particulate Matters (PM) Emission to less than 5 mg/Nm3 to reach Ultra-Low Emission (ULE) standards. This research examines the PM Emission from a ULE power plant. The power plant was equipped with a low-temperature economizer, a wet electrostatic precipitator (WESP), a retrofitted electrostatic precipitator (ESP) and a flue gas desulfurization (FGD) system. The PM10, PM2.5 and PM1 Emissions were 0.36 mg/m3, 0.36 mg/m3 and 0.09 mg/m3, respectively. The capturing efficiencies of the retrofitted ESP and WESP were over 98.7% and 80.5%, respectively. The FGD did not significantly capture PM2.5 and PM1. The PM collected from the Electrical Low Pressure Impactor (ELPI+) was analyzed using scanning electron microscope/energy dispersive spectrometer (SEM/EDS). The SEM/EDS data showed small limestone/gypsum particles. These particles probably entered the flue gas from the FGD. This research shows that WESP can effectively capture PM greater than 0.3μm and particles of limestone and gypsum.