SI engine assessment using biogas, natural gas and syngas with different content of hydrogen for application in Brazilian rice industries: Efficiency and pollutant emissions

Nadaleti, Willian Cezár; Przybyła, Grzegorz

doi:10.1016/j.ijhydene.2018.04.073

Cited by 28 publications

(13 citation statements)

References 27 publications

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“…A number of research studies [23][24][25][26][27][28] have focused their attention on the use of different types of natural gas-derived fuels. One of the most studied investigations deals with the enrichment of NG with a fast-burning fuel, such as hydrogen, aiming at extending the lean operation limitations of NG fueled SI engines thanks to the improvements in terms of laminar burning velocities (i.e., hydrogen has a laminar burning velocity seven times higher than NG) [25].…”

Section: Motivations Focus and Research Questionsmentioning

confidence: 99%

“…Syngas power derating in spark ignition engines is usually quantified at around 15-40% of the maximum output power [32]. Whenever the required load exceeds the effective engine power output, an external input fuel has to be provided [27]. Hence, complementing syngas mixture with natural gas becomes a necessity.…”

Section: Motivations Focus and Research Questionsmentioning

confidence: 99%

“…The competing effects should be taken into account. On one hand, H 2 and CO in syngas increase the combustion temperature that facilitates the thermal formation of NO x [27]. Moreover, the relative amounts of CO and H 2 can also have a significant impact on NO x emissions, as stated by Hasegawa et al [57]: the higher the CO/ H 2 molar ratio, the slower the O 2 consumption rate; higher concentrations of O 2 are available for NO x formation, and as a result, the NO x production rate is increased [57].…”

Section: No X Emissionsmentioning

confidence: 99%

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Complementing Syngas with Natural Gas in Spark Ignition Engines for Power Production: Effects on Emissions and Combustion

et al. 2021

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Power generation units based on the bio-syngas system face two main challenges due to (i) the possible temporary shortage of primary sources and (ii) the engine power derating associated with the use of low-energy density fuels in combustion engines. In both cases, an external input fuel is provided. Hence, complementing syngas with traditional fuels, like natural gas, becomes a necessity. In this work, an experimental methodology is proposed, aiming at the quantification of the impact of the use of both natural gas and syngas in spark ignition (SI) engines on performance and emissions. The main research questions focus on investigating brake thermal efficiency (BTE), power derating, and pollutant emission (NOx, CO, THC, CO2) formation, offering quantitative findings that present the basis for engine optimization procedures. Experimental measurements were performed on a Toyota 4Y-E engine (a 4-cylinders, 4-stroke spark ignition engine) at partial load (10 kW) under different syngas energy shares (SES) and at four different spark ignition timings (10°, 25°, 35° and 45° BTDC). Results reveal that the impact of the different fuel mixtures on BTE is negligible if compared to the influence of spark advance variation on BTE. On the other hand, power derating has proven to be a limiting factor and becomes more prominent with increasing SES. An increasing SES also resulted in an increase of CO and CO2 emissions, while NOx and THC emissions decreased with increasing SES.

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Section: Motivations Focus and Research Questionsmentioning

confidence: 99%

Section: Motivations Focus and Research Questionsmentioning

confidence: 99%

Section: No X Emissionsmentioning

confidence: 99%

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Complementing Syngas with Natural Gas in Spark Ignition Engines for Power Production: Effects on Emissions and Combustion

et al. 2021

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“…Many success biomass gasification systems have been reported worldwide. The producer gas has been explored as a fuel of either Spark Ignition (SI) engine [11][12][13] or Compression Ignition (CI) engine [14][15][16]. In downdraft gasifier, the feedstock and the producer gas flow downward in the reactor during gasification.…”

Section: Introductionmentioning

confidence: 99%

Development of An Air-Stage Downdraft Gasifier and Performance Evaluation on Feedstock of Rice Husk

Susastriawan

Purwanto

Purnomo

et al. 2024

ARFMTS

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Due to depletion of conventional fuel and increasing global warming, biomass wastes have been explored and investigated by many researchers worldwide. A biomass gasification power plant is a promising conversion technology for energy sustainability. From many existing gasifiers have been developed, mostly they have high technology, large capacity, and very costly, thus unsuitable for remote area di Indonesia. The present work aims to build a simple and low cost double air-stage downdraft gasifier for a small-scale biomass power plant system. The gasifier is tested on rice husk at equivalence ratio of 0.20, 0.30, and 0.40. The parameters evaluated are axial temperature, fuel consumption rate, heating rate, thermal efficiency, and tar content. The results show that the highest gasification temperature, fuel consumption rate, heating rate, and thermal efficiency are occurs at equivalence ratio of 0.4. The values are 904.5°C, 4.14 kg/h, 25.38 kJ/h, and 63.18%, respectively. The significant findings is that the gasifier generates producer gas with low tar content, i.e. 23.9 mg/m3 at equivalence ratio of 0.4 and the producer gas is successfully used to run the 3 kW generator set. For sustainability operation of the power plant, it is important to test the gasifier on various biomass waste feedstocks.

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“…Nadaleti et al [13] made experiments tos see the effect of biogas-syngas dual fuel in a SI engine on engine emission characteristics. The results show that the use of biogas fuel decreases NOx emissions with a increase HC emissions.…”

mentioning

confidence: 99%

Emissions and Performance Characteristics of an Si Engine With Biogas Fuel at Different Co2 Ratios

Karagöz¹

2019

Journal of Thermal Engineering

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Nowadays increasing emission regulations and environmental concerns have led to the use of alternative fuels in internal combustion engines. Biogas is an alternative fuel that can be produced with clean, green and natural resources. In this study, a single cylinder, four stroke SI engine was operated at stoichiometric conditions, 2800 rpm constant engine speed with biogas fuel at different ratios. As biogas fuel, methane (CH4) and CO2 were used during engine tests. Test results which were taken by using only gasoline were compared with the results obtained by using biogas fuel at different CO2 ratios (10%, 20%, 30% and 40% by volume). Although it was determined specific CO emissions decrease and THC emissions slightly increases with the increasing CO2 ratio, it is foreseen that the increase in THC emissions can be prevented by the use of three way catalytic converter. Although the NOx emissions increase with the use of biogas compared to gasoline, it was significantly reduced by the increased CO2 rate in the biogas fuel, the CO2's heat carrying capacity and reducing the O2 availability of the fuel. On the other hand, because of the high cost of purification process of biogas and after-treatment equipment, it is foreseen that use of biogas at high ratio of CO2 in SI engines will be advantageous in terms of NOx emissions.

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SI engine assessment using biogas, natural gas and syngas with different content of hydrogen for application in Brazilian rice industries: Efficiency and pollutant emissions

Cited by 28 publications

References 27 publications

Complementing Syngas with Natural Gas in Spark Ignition Engines for Power Production: Effects on Emissions and Combustion

Complementing Syngas with Natural Gas in Spark Ignition Engines for Power Production: Effects on Emissions and Combustion

Development of An Air-Stage Downdraft Gasifier and Performance Evaluation on Feedstock of Rice Husk

Emissions and Performance Characteristics of an Si Engine With Biogas Fuel at Different Co2 Ratios

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