Abstract: Xanthoceras sorbifolia bunge biodiesels with two ester groups are prepared through transesterification of xanthoceras sorbifolia bunge oil with methanol and ethanol respectively and are then separately blended with 0# pure diesel oil at different ratios such as 0,10%,20%,30%,40%,50%,60%,70%,80%,90% and 100%.The density,surface tension and kinematic viscosity of the blending fuels are investigated.Influences of temperature and blending ratio on the physicochemical properties of blending fuels are studied.Results illustrate that the density of both methanol-based blending biodiesel and ethanol-based blending biodiesel decreases as temperature increases,so does their surface tension.At the same temperature,their surface tension decreases as the volume blending ratio increases.The kinematic viscosity of two categories of blending biodiesels increases with the increase of volume blending ratio.Xanthoceras sorbifolia bunge biodiesels with larger ester groups exhibit higher kinematic viscosity.Detection by Infrared spectra suggests that two categories biodiesels have similar functional groups.
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