Abstract
With the continuous increase of world’s population, rapid development of industrialization and urbanization, and rapid growth of economy, the fossil fuel consumption is also increasing continuously to meet growing energy demand. The unsustainability of fossil fuels and the issues of national energy security make it very urgent to develop the appropriate and sustainable replacement for fossil fuels. Biodiesel is one of appropriate alternatives for diesel engine due to its renewable and eco-friendly nature. This greener fuel has been used in many countries across the continents in a blending range up to 20% with petrodiesel. However, the high biodiesel production cost is still a major obstacle to market acceptance. Non-edible woody oils can be considered as low-cost substitutions for traditional edible vegetable oils for biodiesel production. In order to make biodiesel into reality in much wider scope, a growing number of relevant researches focused on: (1) evaluating the biodiesel properties; (2) optimizing the production process; and (3) assessing the environmental impact. This article reviews these three aspects in order to reflect the research status and development potential of non-edible woody oil-based biodiesel.
Highlights
Energy is the driving force of the socio-economic growth of the society
The cetane number (CN) values of Vernicia montana biodiesel and Sapium sebiferum biodiesel were lower because both raw oils contained more polyunsaturated fatty acids
Encinar[19] et al (2012) used the subcritical alcohol transesterification method for biodiesel production and the results showed that the biodiesel yield of 99.9% could be obtained with reaction temperature 100 °C, molar ratio of methanol to oil 12:1, and mass ratio of catalyst to oil of 0.7%
Summary
Energy is the driving force of the socio-economic growth of the society. with the further increase of world’s population, energy demand is rising sharply. As an important aspect of bioenergy utilization, the development of biodiesel from vegetable oil has become a hot topic, because biodiesel has similar fuel characteristics to diesel. Fourth generation biodiesel includes synthetic biology technology and research on this is still on infancy level. Among these different types of biodiesel, the 2nd biodiesel were seemed closer to the properties of standard diesel[5]. Choosing non-edible woody oils to produce biodiesel can help to reduce the production cost and develop marginal land. Comprehensive consideration of environmental preservation, exhaust emissions, production costs and engine performance, non-edible woody biodiesel is more suitable for priority development at present[6]. The detailed contents of each part are shown
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