Abstract

Rice bran oil is substantially the only domestically-produced vegetable oil. In this study, fuel properties of rice bran methyl ester (RBME) were investigated. Although RBME has the drawback of high pour point, it can be improved by blending dimethyl ether (DME). DME was well soluble in RBME in any blend ratio. The cloud point and the kinetic viscosity decreased as the DME blend ratio increased. Engine test was also conducted using a small DI CI engine. Thermal efficiency of RBME/DME operation is equivalent to that of diesel fuel operation. Smoke emission remarkably decreases as the DME blend ratio increases.

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