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美国留学硕士论文:浅析生物燃料的发展趋势 [5]

论文作者:www.51lunwen.org论文属性:硕士毕业论文 dissertation登出时间:2015-06-11编辑:felicia点击率:9288

论文字数:17109论文编号:org201506082037339874语种:英语论文 English地区:美国价格:免费论文

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摘要:这是一篇美国留学论文,浅析了生物燃料的发展趋势,希望大家通过这篇文章更加了解生物燃料。

this study on researcher's personal abilities and skills.


1.7 Assumption and Limitations in Research Project


This study do have some limitations due some inevitable constraints, most crucial of them include the time and resource constraints. Time for the research was not enough to conduct this study at length; I had to take relatively small sample to meet the time limit for this project. The small sized sample may have introduced biasness in the results obtained through this study.


Due to resources constraint it was not possible for the researcher to visit managers individually, so the interviews were conducted by using technology through Skype. Due to lack of face to face interactions, there may be some type of communication and comprehension fissures in the results obtained during this study.


2 Chapter 2- Literature Review


2.1 History and Introduction of Biofuels


There has been a lot of study on technical aspects of energy plagiarized from biomass, both the biofuel and biodiesel; examples include the studies conducted by Faaij, (2006), Ryan et al., (2006) and Goldemberg and Teixeira, (2004). Two main classes of biofuels are bio ethanol and biodiesel. Biofuels are classified into first and second generation on the basis of the source of fabrication.


2.2 First Generation of Biofuels


According to the studies carried out by Van Der Laaaka et al., (2007) regarding the sources of production of bio ethanol, it has come into sight as the chief candidate for replacement of gasoline to be used in transportation vehicles. The sources of its fabrication are usually the food crops, examples include sugarcane, corn, and sorghum; sugar beet and wheat are also being used in some countries for the bio ethanol production. They concluded that biofuel can be synthesized by using crops other than food crops; it is more advantageous alternative than food crops and their residues.


There is a serious concern that the first generation biofuels are consuming the food sources that were mainly comestible in the past. It was revealed by McCormick-Brennan et al, (2007) that the most serious concern related to the first generation biofuels is the inefficiency, this concern requires the use of different production technologies and use of energy efficient crops for the synthesis of these fuels. The entire ranges of first generation processes for synthesize of biofuels from the corn and wheat depends upon the starch content of the kernels of these crops.


In case of sugar cane and sugar beet the quality of biofuel depends on the sucrose content of the two. The rest of the substances preset in these crops are wasted after their use for the production of biofuels. Some production units are also using seeds of different crops for the extraction of the vegetable oil that is in turn used for the production of the biodiesel. The efficiency of biofuels is also questioned by Van Der Laaka et al., (2007).


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