The current study investigates the influence of exhaust gas recirculation
technique on the hydrogen (10lpm) inducted diesel engine using Cassia
fistula derived biodiesel fuel. The focus is on evaluating the
emission characteristics of the engine, with a particular emphasis on reducing
NOx emissions. The study also examines the impact of varying the Exhaust Gas
Recirculation (EGR) flow rate 10 and 20% on the aforementioned parameters. The
novelty of this investigation lies in the comprehensive evaluation of emission
metrics, particularly when combining Cassia fistula biodiesel with hydrogen
induction. The experiment carried in Kirloskar TV1-V4A engine with blends
consists 10%, 20%, 30% and 40% by volume of CFME blends with diesel. The
inducted hydrogen at 10 lpm caused increased NOx which were discussed to
suppress by EGR applications. Among the tested fuels, a blend containing 40%
cassia fistula methyl ester (CFME) and 60% diesel
(CFME40D60) showed the lowest hydrocarbon (HC) emissions, achieving 20 ppm, 18
ppm, and 23 ppm under non-EGR, 10% EGR, and 20% EGR conditions, respectively.
Additionally, the CFME40D60 blend exhibited the lowest carbon monoxide (CO)
emissions, with values of 0.0141%, 0.0156%, and 0.0159% by volume under the same
conditions. The blend also demonstrated superior performance in reducing smoke
opacity, achieving 32%, 32%, and 31% opacity, compared with diesel. Notably, the
NOx emissions were significantly low with CFME10D90 blend, showing values of
1910 ppm, 1801 ppm, and 1598 ppm, with a 312 ppm reduction at the 20% EGR rate
compared to non-EGR conditions. These findings provide insights into optimizing
the fuel mixture and EGR settings to achieve improved engine performance and
reduced emissions, making it a viable option for sustainable transportation.