Emissions and performance of a spark-ignition gas engine generator operating with hydrogen-rich syngas, methane and biogas blends for application in southern Brazilian rice industries

Nadaleti, Willian Cezár; Przybyła, Grzegorz

doi:10.1016/j.energy.2018.04.046

Cited by 58 publications

(39 citation statements)

References 21 publications

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“…13,14 Similarly, the rapid, efficient conversion of small amounts of methane to a synthesis gas mixture would improve spark ignition engine and catalytic converter performance while lowering emissions. 15,16 Therefore, further research efforts are needed in the intensication of the steam reforming process.…”

Section: 6mentioning

confidence: 99%

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

et al. 2018

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Methane steam reforming coupled with methane catalytic combustion in microchannel reactors for the production of hydrogen was investigated by means of computational fluid dynamics. Special emphasis is placed on developing general guidelines for the design of integrated micro-chemical systems for the rapid production of hydrogen. Important design issues, specifically heat and mass transfer, catalyst, dimension, and flow arrangement, were explored. The relative importance of different transport phenomena was quantitatively evaluated, and some strategies for intensifying the reforming process were proposed. The results highlighted the importance of process intensification in achieving the rapid production of hydrogen. High heat and mass transfer rates derived from miniaturization of the chemical system are insufficient for process intensification. Improvement of the reforming catalyst is also essential.The efficiency of heat exchange can be improved greatly if the reactor dimension is properly designed.Thermal management is required to improve the reliability of the integrated system. Co-current heat exchange improves the thermal uniformity in the system. The catalyst loading is a key factor determining reactor performance, and must be carefully designed. Finally, engineering maps were constructed to achieve the desired power output, and favorable operating conditions for the rapid production of hydrogen were identified.

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Section: 6mentioning

confidence: 99%

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

et al. 2018

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“…Electrical energy generation efficiency (left) and electrical power (right) for methane (Study 1) and natural gas (Study 2). Adapted from Nadaleti and Przybyla (Study 1) and Nadaleti et al (Study 2).…”

Section: Resultsmentioning

confidence: 99%

“…The first part of this study was based on an analytical comparison of studies by Nadaleti and Przybyla, (Study 1) and Nadaleti et al (Study 2) without using a catalytic converter connected to the SI engine.…”

Section: Methodsmentioning

confidence: 99%

“…The application of blends of biofuels in engines still needs to be developed because their use is recent and not all aspects of efficiency and emissions have been clarified, whereas for fuels such as diesel, gasoline, and alcohol, the efficiency of engine power conversion, ignition advance or retardation, air / fuel mixtures and their relation to the emission of pollutant gases have been widely researched . As CO 2 concentration increases in the biogas composition employed in SI engines, for example, NO x emissions decline, so a significant reduction in NO x emissions using biogas containing CO 2 may be expected, according to Yungjin et al…”

Section: Introductionmentioning

confidence: 99%

“…The objective of this study was to compare the emissions of polluting gases and the efficiency of an SI engine operating with natural gas, methane, Bio65, Bio70, and syngas composed in different ways, taking into account the results achieved using two different studies from Nadaleti and Przybyla, (Study 1) and Nadaleti et al (Study 2). Some important points from both studies were investigated in this analysis.…”

Section: Introductionmentioning

confidence: 99%

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Analytical comparison of emissions before and after using a three‐way catalyzer connected to an SI gas engine operating with methane, natural gas, biogas, and different syngas content

Nadaleti

Przybyła

Lourenço

et al. 2019

Biofuels Bioprod Bioref

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This work compares two studies in which the spark ignition gas engine test was used with typical biogases generated in the rice industry: Bio70 (Study 1), Bio65 (Study 2), Syngas1 and Syngas2 (in both studies). Methane (Study 1) and natural gas (Study 2) were also used. From these studies, three different ignition advance angles were chosen: 20°, 35°, and 55°, to compare and analyze the effects of these fuels and their mixtures inside the engine. The emissions were also evaluated using a three‐way catalytic converter connected to the engine. Study 1 demonstrated lower CO and hydrocarbon (HC) emissions than Study 2 for all conditions and all fuels, whereas NOx emissions varied according to the engine operating conditions (λ and ignition advance angle). Except in the case of the syngases, Study 1 demonstrated higher indicated efficiency, electrical efficiency, and electrical power than Study 2. After the use of the three‐way catalytic converter, HC and CO emissions were strongly reduced for all fuels and in different operational conditions. On the other hand, because the efficiency of the catalytic converter decreases abruptly in mixtures rich in NOx, this pollutant was not removed when λ > 1. The comparison of the two studies and the emissions after the use of a catalytic converter is important as it shows specific ways to improve the use and efficiency of the fuels to encourage the development of renewable energy both in industry and in the transport sector. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd

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Experimental based comparative exergy analysis of a spark‐ignition Honda GX270 Genset engine fueled with LPG and syngas

Ganesan

Sahoo

Porpatham

et al. 2022

Energy Science & Engineering

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The present study investigates three different fuels such as gasoline, liquefied petroleum gas (LPG), and syngas in spark-ignition Honda GX270 Genset engine under wide-open throttle position on its performance, combustion characteristic as well as availability analysis. The results showed that when the engine operated with gasoline fuel, the brake thermal efficiency was higher than that of LPG and syngas by 6.2% and 7.4%, respectively, throughout the engine load condition. Brake-specific fuel consumption of the engine with syngas (660 g/kW h) and LPG fuel (812 g/kW h) was higher than that of the gasoline fuel (510 g/kW h) at the 4.5 kW of engine load. The engine emission results showed syngas operation caused a significant reduction in NOx by 58.4%, CO by 16.5%, HC by 23.2% compared to gasoline fuel at peak load conditions. On the other hand, exergy analysis concludes the exergy efficiency for all the test fuels increases with an increase in engine load due to a high rise in shaft output. At a 4.5 kW power output, the exergy efficiency of the engine was improved to 46.45% from 45.62% and 29.73% with syngas, gasoline, and

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Emissions and performance of a spark-ignition gas engine generator operating with hydrogen-rich syngas, methane and biogas blends for application in southern Brazilian rice industries

Cited by 58 publications

References 21 publications

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

Computational fluid dynamics modeling of the millisecond methane steam reforming in microchannel reactors for hydrogen production

Analytical comparison of emissions before and after using a three‐way catalyzer connected to an SI gas engine operating with methane, natural gas, biogas, and different syngas content

Experimental based comparative exergy analysis of a spark‐ignition Honda GX270 Genset engine fueled with LPG and syngas

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