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    Assessment of the fuel recovery potential of cattle, sheep, and chicken waste fats in diesel engine
    (Springer, 2022) Simsek, S.; Uslu, S.; Simsek, H.
    In this study, biodiesel was obtained by transesterification method from cattle, sheep, and chicken waste fats not utilized in the nutrition sector. Test fuels were formed by blending the biodiesel with diesel fuel in different proportions (10, 20, 30, 50, and 75%). The experiments were carried out at various engine load in an air-cooled, four-stroke, direct injection, single-cylinder diesel engine using the generated test fuels, 100% AFBD (AFBD100) and pure diesel (D100). For performance, brake thermal efficiency (BTE) and brake specific fuel consumption (BSFC) were evaluated, while carbon monoxide (CO), carbon dioxide (CO2), hydrocarbon (HC), nitrogen oxides (NOx), and smoke were considered for emissions. Experimental results show that BTE increases up to 30% AFBD ratio and that more AFBD additions negatively affect BTE. Maximum BTE was achieved with AFBD10 at 3000 W load and an increase of 8.11% was determined compared to D100 at the same load. Conversely, while BSFC, CO2, and NOx raised with the usage of AFBD, smoke, HC, and CO emissions decreased. In the usage of AFBD-containing fuels, minimum BSFC, CO2, and NOx were obtained with AFBD10, while minimum smoke, HC, and CO were obtained with AFBD100. With the AFBD100 test fuel, smoke, HC, and CO emissions decreased on average by 41.82, 26.14, and 15.65%, respectively, compared to the D100. [GRAPHICS] .
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    Evaluation of the effect of a new alternative fuel containing boron and hydrogen on gasoline engine performance and emission responses
    (Springer, 2022) Simsek, S.; Uslu, S.; Simsek, H.
    In this research, the impacts of the use of a new fuel additive called octamix, which is obtained by mixing trioctyl borate as a boron source, ammonia borane as a hydrogen enhancer and ethyl alcohol, on the performance and emission values in a gasoline engine have been investigated experimentally. The experiments were carried out using four different fuel mixtures obtained by mixing octamix with gasoline at 0.5%, 1%, 2% and 3% by volume and pure gasoline at different engine load values in a single cylinder spark ignition engine. While brake thermal efficiency and brake specific fuel consumption were evaluated as performance parameters, carbon monoxide, hydrocarbon, carbon dioxide and nitrogen oxide were taken into consideration as emission responses. Experimental results revealed that using octamix higher than 0.5% was not efficient in terms of performance and emission. With the use of a fuel blend containing 0.5% octamix, overall emission and performance values improved but deteriorated with other octamix-containing fuels. According to the results, it can be said that octamix fuel is more suitable for use as a fuel additive rather than as a stand-alone fuel for gasoline engines and the use of only 0.5% octamix-containing fuel mixture is efficient.
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    Optimization of gasoline engine emission parameters employing commercial and sucrolite-catalyst coated converter using response surface methodology (Feb, 10.1007/S13762-022-03968-5, 2022)
    (Springer, 2023) Sathyanarayanan, S.; Suresh, S.; Uslu, S.; Shivaranjani, R. S.; Chandramohan, V. P.; Simsek, S.
    [No abstract available]
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    This study aims to optimize the engine parameters using response surface methodology to achieve fewer pollutants in the exhaust of a spark-ignition engine mounted with a commercial catalytic converter and a sucrolite-catalyst coated converter
    (Springer, 2023) Sathyanarayanan, S.; Suresh, S.; Uslu, S.; Shivaranjani, R. S.; Chandramohan, V. P.; Simsek, S.
    This study aims to optimize the engine parameters using response surface methodology to achieve fewer pollutants in the exhaust of a spark-ignition engine mounted with a commercial catalytic converter and a modified catalytic converter. In this research, a sucrose-doped alumina was used as a catalyst as a novel technique to reduce the harmful pollutants present in the exhaust gas. The experiment allowed exhaust gas to pass axially through the converters. The experimental parameters employed were used to develop a numerical model to predict emission levels concerning catalytic converters. The numerical model was developed using brake power, actual to the theoretical air-fuel ratio, and engine exhaust gas pollutants measured before being treated by the catalytic converter as input variables, and primary toxic pollutants treated by the catalytic converters output parameters. The developed model showed superior performance, with higher R-2 values over 0.987 for all cases. The experimental results validated the predicted optimum responses, and the measured error percentage was less than 3% for most cases. The optimized parameters yielded a desirability factor of 0.831 for the commercial catalytic converter and 0.9 for the modified catalytic converter. Thus, the developed response surface methodology model can highly predict the emission characteristics. [GRAPHICS] .