Investigation on Production Process of Microalgae Biodiesel Using Heterogeneous Strong Alkaline Photocatalysts

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Project title

Code/計畫編號

NSC102-2221-E019-039-MY3

Translated Name/計畫中文名

利用非均相強鹼光觸媒製備微藻生質柴油的製程研究

Project Coordinator/計畫主持人

Cherng-Yuan Lin

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Marine Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=11273097

Year

2015

Start date/計畫起

01-08-2015

Expected Completion/計畫迄

31-07-2016

Bugetid/研究經費

922千元

ResearchField/研究領域

能源工程

微藻是地球上經由光合作用產生油脂最有效率的生物體。本研究將利用由高油脂微藻體萃取出的油脂作為生產生質柴油的料源，可避免使用大豆等能源作物造成與民爭糧的人道爭議。另外非均相強鹼光觸媒能夠在轉酯化反應後迅速由粗產物溶液中回收再利用，本研究將用來取代傳統的均相強鹼觸媒，以大量節省洗滌粗生質柴油及粗甘油所需的用水量及廢水處理量；而為減少觸媒製備所需的能量及時間，本研究將採用超音波強化奈米光觸媒粉末與甲醇鈉溶液的均勻混合，再配合微波加熱進行烘乾及鍛燒。本計畫規劃三年期程完成相關工作。第一年著重在微藻油脂培植，及利用非均相強鹼光觸媒TiO2/CH3ONa在LED紫外光照射下催化微藻油脂之轉酯化反應。在第二年強調低耗能的強鹼光觸媒ZnO/CH3ONa 的製程研發，並測試此非均相強鹼光觸媒提昇轉酯化反應的效益。在第三年將根據前二年的研發測試結果，建立提高微藻生質柴油產率及品質的關鍵技術，並根據微藻油脂、強鹼光觸媒、生質柴油各項性質、與引擎性能等各項性質的測試結果，適度調整相關製程參數；之後對於微藻生質柴油進行生命週期分析，評估其能源輸出輸入比，以達到建立節能、省時、低耗水、高燃料品質的綠能環保之微藻生質柴油製程的計畫目標。Microalgae are the organism bearing with the highest efficiency of lipid production via photosynthesis in the world. Lipid extracted from selected high-lipid microalgae will be used as the feedstock for biodiesel production in this study so that the ethical controversy of competing with human food can be avoided. Heterogeneous strong alkaline photocatalysts which can be readily recycled from crude product mixture after transesterification process will be prepared through calcinations assisted by ultrasonic vibration accompanied with microwave heating to reduce energy and time consumption. The quantities of both clean water for washing the crude biodiesel and glycerol products and waste water after washing will be greatly reduced due to the application of a heterogeneous catalyst. A three-year proposal is organized for this study. In the first year, the research will focus on culturing high-lipid microalgae for further biodiesel production. A strong alkaline photocatalyst TiO2/CH3ONa after being prepared will be irradiated by ultraviolet light from LED lamps to facilitate the transesterification rate of microalgae lipid with methanol. In the second year, the research will emphasize on improving the catalyzing characteristics of the photocatalyst ZnO/CH3ONa by using an ultrasonic vibrator accompanying with a microwave tube to improve the extent of calcinations and thus reduce the consumption of both energy and prepared time. In the final year, the key techniques for increasing microalgae biodiesel production through ultraviolet irradiation on the strong alkaline photocatalysts will be established. The culturing environment of microalgae, preparing conditions for the photocatalyst, irradiation strength of ultraviolet light, reacting environment of lipid mixture will be adequately adjusted for optimization primarily based on the test results of lipid composition, photocatalyst characteristics, fuel properties and engine performance of the biodiesel product. A life cycle assessment for the microalgae biodiesel will thereafter be carried out and its energy yield ratio will be evaluated as well. As a consequence, the purpose of establishing a green sustainable biodiesel production process with much reduced consumption of water, energy and superior fuel property will be achieved.

Keyword(s)

微藻
生質柴油
強鹼光觸媒
燃料性質
轉酯化
Microalgae
biodiesel
strong alkaline photocatalyst
fuel property
transesterification

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Investigation on Production Process of Microalgae Biodiesel Using Heterogeneous Strong Alkaline Photocatalysts

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