Hydrogen and CNG dual-fuel operation of a 6-Cylinder CI engine fueled by HVO and diesel: Emissions, efficiency, and combustion analyses

IF 8.1 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-02-26 DOI:10.1016/j.ijhydene.2025.02.306

G.M. Pinto , T.A.Z. de Souza , R.B.R. da Costa , L.F.A. Roque , G.V. Frez , L.P.V. Vidigal , N.V. Pérez-Rangel , C.J.R. Coronado

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Abstract

Hydrotreated vegetable oil (HVO) is an efficient drop-in fuel for Diesel engines, which can be used alongside other renewable fuels in dual-fuel mode. In the present study, a commercial six-cylinder 150 kW Diesel engine was tested with diesel, HVO, and their combinations with compressed natural gas (CNG) and hydrogen. The experiments followed the Non-Road Steady Cycle (NRSC), and the gaseous fuels were port-injected after modifications in the original engine. Compared to diesel operation, HVO reduced emissions of CO₂ and NO_x by 6.3% and 4.3%, respectively, while increasing brake thermal efficiency by 6.5% and combustion efficiency by 0.1%. Natural gas and hydrogen presented similar effects on both pilot fuels, leading to delayed combustion (up to 1.8°), higher in-cylinder temperature (13–90 K), lower brake thermal efficiency, and decreased CO₂ emissions compared to diesel single-fuel combustion. Hydrogen maintained similar CO and hydrocarbon levels, whereas these emissions increased with CNG combustion. Therefore, HVO could replace fossil diesel in commercial heavy-duty engines, and the dual-fuel operation with hydrogen and CNG could decrease the consumption of HVO while decreasing CO₂ emissions.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.