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Experimental investigation of naphthenic biofuel surrogate combustion in a compression ignition engine
Ran, Z., Hadlich, R. R., Yang, R., Dayton, D. C., Mante, O. D., & Assanis, D. (2022). Experimental investigation of naphthenic biofuel surrogate combustion in a compression ignition engine. Fuel, 312, Article 122868. https://doi.org/10.1016/j.fuel.2021.122868
Biomass catalytic fast pyrolysis (CFP) integrated with hydrotreating (HT) produces advanced biofuels that could be used as bio-blendstocks to improve the properties of petroleum diesel fuels and enhance their combustion in compression ignition engines. The biofuels produced by CFP and HT are rich in naphthenes (cycloalkanes) that could improve cold-weather behavior and reduce the sooting propensity of blended diesel fuels. In this study, a surrogate fuel (SF1) that simulates a high-quality naphthenic bio-blendstock recovered from biomass CFP and HT was blended with research-grade No.2 diesel fuel (DF2) in different volume percentages and experimentally investigated in a single-cylinder Ricardo hydra diesel engine. Experiments were conducted by varying the fuel injection timings from the knock limit to the misfire limit at the same engine operating conditions for all of the SF1-DF2 blends (up to 40% by volume) and baseline No.2 diesel fuel. Engine output performance, combustion characteristics, and emissions including nitric oxides (NOx), carbon monoxide (CO), total hydrocarbon (THC), and particulate matter (PM) were measured and analyzed. Experimental results showed that the surrogate blended at 10% and 20% by volume could yield comparable (20% &
