TY - JOUR
TI - Emission estimation of neat paradise tree oil combustion assisted with superheated hydrogen in a 4-stroke natural aspirated DICI engine
AU - Sundararajan Karthikayan
AU - Subbiah Ganesan
AU - Gomathinayakam Sankaranarayanan
JN - Thermal Science
PY - 2016
VL - 20
IS - 14
SP - 1137
EP - 1144
PT - Article
AB - This research work investigates the use of neat paradise tree oil in a  4-stroke natural aspirated direct injection compression ignition engine  assisted with the help of super-heated hydrogen (hydrogen in gaseous state or  above its saturation temperature) as a combustion improver. The high  calorific gaseous fuel hydrogen gas was used as a combustion improver and  admitted into the engine during the suction stroke. A 4-stroke single  cylinder Diesel engine was chosen and its operating parameters were suitably  modified. Neat paradise tree oil was admitted through standard injector of  the engine and hydrogen was admitted through induction manifold. Inducted  super-heated hydrogen was initiated the intermediate compounds combustion of  neat paradise tree oil. This process offers higher temperature combustion and  results in complete combustion of heavier molecules of neat paradise tree oil  within shorter duration. The results of the experiment reveal that 40% higher  NOx, 20% lower smoke, 5% lower CO, and 45% lower HC than that of neat  paradise tree oil fuel operation and the admission of superheated hydrogen  has improved the combustion characteristics of neat paradise tree oil. The  investigation successfully proved that the application of neat paradise tree  oil with 15% of hydrogen improver is possible under a regular Diesel engine  with minimal engine modification.