FUEL PROPERTIES AND EMISSION

CHARACTERISRICS OF DIESOHOL

XU Boyan¹  ZHANG Weibin²  QI Yunliang¹  CAI Shaoli³

(1. School of Mechanical Engineering, Shandong Institute of Architecture and Engineering, Jinan 250014;
2. Department of Mechanical Engineering, Jinan Railway Institute of Technology, Jinan 250013;
3. School of Mechanical Engineering, Jinan University, Jinan 250022 )

Abstract: An additive compound consisting of medium carbon alcohol, low carbon ether, macromolecule polymer and organic nitric acid ester is developed to overcome the problems of phase separation and low cetane number in the application of diesohol. The titration experiments prove that the mutual solubility be-tween the diesel and the ethanol is improved by adding 1%～2% (in volume) of this additive. The engine bench tests show that the cold starting performance of the diesohol with the addi-tive can be almost as good as that of the pure diesel. The effects which the pure diesel and several kinds of diesohol with differ-ent ethanol blend ratios have on the fuel economy, soot and the emissions of THC, CO and NOx are also investigated. As a re-sult, the specific fuel consumption of each diesohol is more than that of diesel, but the brake thermal efficiency and the soot intensity are all better than those of diesel. The NOx emission deteriorates with the increasing of engine load but has a decline trend under high load operation conditions with the increasing of ethanol blend ratio.

Key words: Diesohol Phase separation Solubilizer Cetane number improver Emission characteristics

CLC No: TK432.5

国家自然科学基金资助项目(505760412). Received 20060307, received in revised form 20060920