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	Towards biodiesel production using lignocelluloses; 利用木质纤维素生产生物柴油
	Zhao ZB(赵宗保)
	2007-06-26
会议名称	2007 international conference for bioeconomy
会议日期	2007-06-26
会议地点	中国
其他题名	利用木质纤维素生产生物柴油
页码	198/3
通讯作者	zhao zongbao
中文摘要	towards biodiesel production using lignocelluloses 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.
会议主办者	科技部
学科主题	物理化学
语种	中文
内容类型	会议论文
源URL	[http://159.226.238.44/handle/321008/112746]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
推荐引用方式 GB/T 7714	Zhao ZB. Towards biodiesel production using lignocelluloses, 利用木质纤维素生产生物柴油[C]. 见:2007 international conference for bioeconomy. 中国. 2007-06-26.

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