| Summary: | 碩士 === 大葉大學 === 工學院碩士在職專班 === 101 === Cellulosic ethanol is efficient in both energy saving and carbon reduction. It helps to ease greenhouse effect, and is considered to be a usable source for bioethanol. Cellulosic ethanol has drawn much attention from governments, scientists, and entrepreneurs, and it is expected to become the future biofuel. Having adopted literary analysis, this study collates and analyzes data about wood-extracted ethanol that are collected nationally and internationally. An overview on the theory and technologies of wood decomposition in the production of ethanol is provided in this paper. The paper also discusses the development of existing researches and technologies, and further analyzes and evaluates the advantages and disadvantages of the technologies’ condition. In the final part of this paper, future paths for the research, development, and outlook on ethanol produced from decomposed wood are proposed.
With the help of pre-processing technologies, the cellulose and hemicellulose of wood can be transformed into pentose and hexose. The ethanol production rate is as high as 75%. With the gradual mature of production technologies, the purity rate of ethanol produced can reach up to 99.5%. Also, its source materials do not cause food problems. Among common source materials, the bioethanol produced from per ton of agricultural waste residues is 250 liters, which has a great impact on rural economy and the protection of environment and ecology. Once it is promoted nationally to increase the ethanol percentage up to 10% (E10) in bioethanol, it will prop up the overall GDP growth to 0.37% and the growth of agricultural GDP will reach 6.81%. It will also create up to 14 thousand jobs of employment-population in the agricultural sector, which indicates a great economic efficiency. However, there are still problems related to the decomposition of wood for the production of ethanol. Current bottlenecks include: high cost, choice of bacteria, technology breakthroughs, and industrial production. In the future, if a more cost effective way is discovered, with cellulosic ethanol’s diverse source materials, the competitiveness of cellulosic ethanol will be improved. Also, with governments’ subsidies in the beginning phase of implementation, the regulation of related laws, and the research on the field, it is believed that the industrialization of producing ethanol from decomposed wood will surely be accomplished.
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