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Investigation of Harmful Chemical Compounds from Dual-Fuelled Diesel Engine

Smigins Ruslans, Skrzek Tomasz, Górska Milena, Pawlak Grzegorz

Advances in Science and Technology. Research Journal

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2020

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Vol. 14, no 4

21--29

EN

This paper investigated the impact of the exhaust gas recirculation on the concentration of selected harmful chemical compounds from the AVL 5402 research diesel engine powered with diesel fuel (DF) and compressed natural gas (CNG). The engine was operated in the dual fuel mode. It means that the engine was conventionally fuelled by regular diesel fuel and simultaneously by CNG dosed into the inlet pipe. The necessary tests were carried out for the mixtures containing 30, 50 and 70% of CNG (by energy content) in the total chemical energy delivered together with diesel fuel (DF) into the combustion chamber. The research was conducted for the stationary conditions of the engine operation at 1200 rpm and constant 1004 Joules of a fuel chemical energy delivered in each cycle into the combustion chamber. Under such conditions, the impact of the EGR rate changed in range of 0–50% on the emissions of selected unburned hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx) as well as particulate matter (PM), was evaluated. The obtained results confirmed that the EGR system is effective in the reduction of the NOx formation for all tested fuel mixtures. Nevertheless, it was found that the addition of CNG combusted in the diesel engine generates more harmful pollutants in comparison with diesel fuel. However, in some cases the concentration of NOx as well as PM was comparable or lower. It suggests that the combustion of CNG in diesels allows achieving environmental benefits. In this case, further optimization of the engine fuel supply system is necessary.

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Transport morski a środowisko naturalne. Eksploatacja statków morskich. Zagrożenia. Szkodliwe emisje

Markowski M., Łajdych M.

Gospodarka Materiałowa i Logistyka

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2017

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nr 12

653--670

PL

Niniejszy artykuł przedstawia wpływ transportu morskiego na środowisko naturalne. Wymieniono i opisano główne emisje wytwarzane przez statki, oddziałowujące zarówno na środowisko jak i na człowieka. Przedstawiono również najważniejsze dokumenty międzynarodowe regulujące przeciwdziałanie wytwarzania zanieczyszczeń przez statki.

EN

The article presents the influence of the sea transport on the environment. It enumerates and describes mainly the vessels’ emission, affecting both the environment and human beings. Furthermore, the most important international documents regulating the counteracting the emission of vessels’ pollution are presented.

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Metoda LCA narzędziem oceny wpływu technologii na środowisko

Głuszek A., Magiera J.

Czasopismo Techniczne. Mechanika

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2003

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R. 100, z. 5-M

175-180

EN

In this paper the application of Life Cycle Assessment (LCA) procedure to waste oils regeneration is presented. Two different regeneration routes have been taken into consideration and the results of the LCA study are discussed. The results of our study reveal that the route based on vacuum destillation and finishing clay treatment has an impact factor highter than the route, where hydrofinishing is used as the finishing step for the regeneration.