A review of performance and emission parameters of diesel engines using bio-diesel fuel blended with hydrogen.

Diesel engine emits higher levels of nitrogen oxide, carbon monoxide, smoke, unburnt hydrocarbon (UHC), and other noxious gases (such as particulates and insalubrious gases) than gasoline engines. Reducing noxious emissions can be performed by hydrogen enrichment in C.I. engines. This paper, it is studied about blending of diesel and different types of bio-fuel with Hydrogen and its effects on the characteristics of performance and emission of the compression ignition engine. When hydrogen is enriched to diesel and biodiesel then its performance is improved and emissions are reduced. The engine was worked at various speeds and various loads. Biodiesel was produced through the transesterification process. This paper gives a point-by-point outline of hydrogen expansion in C.I. engines. Studies showed that brake thermal efficiency increasing addition of H₂ in diesel and biodiesel, brake specific fuel consumption decreasing by enrichment of H₂ in diesel and biodiesel, brake power increasing addition of H₂ in CNG, brake specific energy consumption decreasing by increasing the hydrogen concentration but it is increasing by EGR. UHC, CO, CO₂, Soot formation decreasing by hydrogen addition to the engine intake port. NO_x emission increases by enrichment of H₂, but it decreases by EGR. [ABSTRACT FROM AUTHOR]