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学科主题: 物理化学
题名: Towards biodiesel production using non-lipid biomass
作者: Hua YY(华艳艳) ;  Zhao J(赵金) ;  Zhao X(赵鑫) ;  Zhao ZB(赵宗保)
会议名称: The international conference of biorefinery
会议日期: 2007-10-20
出版日期: 2007-10-20
会议地点: 中国
其他题名: 利用非油脂原料制备生物柴油
通讯作者: 赵宗保
部门归属: 十八室
主办者: 北京化工大学
摘要: Towards Biodiesel Production Using Non-Lipid Biomass Biodiesel is technically defined as alkyl (usually methyl and ethyl) esters of long-chain fatty acids. When used as a fuel, biodiesel shows many merits, such as high energy density, more favorable combustion emission profile, improved lubricating properties, and others. It is also an environment-benign fuel comparing with petroleum-based diesel, as biodiesel is biodegradable, non-toxic, and essentially carbon dioxide neutral. Therefore, biodiesel is considered as an excellent renewable energy carrier. Biodiesel is now commercially manufactured through transesterification of lipids, or triacylglycerides (TAG) originated from plant seeds or animal tissues. Various renewable lipids were chosen as feedstock for biodiesel production. For example, European countries use rapeseed oil; USA, soybean oil; and the Southeast Asian countries, palm oil, etc. Current world TAG production with grassy oil crops or other woody oil plants produces around 120 million metric tons every year. As biodiesel industry is developing explosively, TAG supply worldwide is getting extremely tight. The situation has also put food supply and traditional oleochemical industry in threat. Production of more TAG with conventional technology requires large amounts of arable land, which in many regions is not a realistic option. In China, oil crops produce around 10 million tons of vegetable oil every year, which is not even enough for food. In 2006, the net import of vegetable oil for China was 6.3 million tons, according to the data from the Ministry of Agriculture of PRC. Therefore, sustainable biodiesel industry needs novel technology to secure TAG supply. Lipids production through fermentation process using oleaginous microorganisms can be an alternative way in lieu of traditional oil plant-based practice. Many molds, yeasts and algae exhibit a capacity to accumulate intracellular lipids as high as over 70% of their biomass, and the major microbial lipids closely resemble vegetable oils in that they are composed of C16 and C18 series long-chain fatty acids. Moreover, it is well documented that oleaginous microbes can metabolize both hexoses and pentoses present in lignocellulosic biomass and other cheap raw materials. Scientists of Dalian Institutes of Chemical Physics, CAS, have advocated the proposal of “biomass-to-biodiesel” (BM2BD) that produces biodiesel using lignocellulosic materials as feedstock. To attain biodiesel, three stages are included, 1) Hydrolysis of lignocelluloses to deliver complex carbohydrates containing both hexoses and pentoses; 2) Fermentation with oleaginous microbes to accumulate intracellular lipids; and 3) Transesterification of microbial lipids with methanol using traditional technology. The BM2BD strategy can be operated continuously and with no extensive arable land requirement. Moreover, by utilization of lignocelluloses, the most abundant renewable carbon source in the world, it is no longer competing with food and oleochemical industry for conventional raw materials. Apparently, BM2BD research is pivotal for a sustainable biodiesel industry. Progress and challenges for biodiesel production using lignocelluloses as feedstock will be discussed during the meeting.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/112744
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Hua YY,Zhao J,Zhao X,et al. Towards biodiesel production using non-lipid biomass[C]. 见:The international conference of biorefinery. 中国. 2007-10-20.
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