| The richest components of Biodiesel are fatty acid methyl esters.And the carbon-carbon double bond in the fatty acid methyl esters is very easy to be oxidized. However, the oxidation of biodiesel not only causes many problems, such as engine corrosion, oil passage clogging and some others, but also shortens the life of diesel engine.So the oxidation stability of biodiesel is very important in evaluating the quality of biodiesel.Therefore, the study on biodiesel antioxidant attracted more and more research people.Through reviewing and summarizing different kinds of pyrolysis technologies and their characteristics, and the current research situation of making bio-oil by pyrolysis, microwave pyrolysis is considered to be one of the better new technologies for bio-oil production, which can be effectively used in biomass pyrolysis because of advantages like high efficiency, uniform heating, selective, non-polluting and easy control,etc. Bamboo is one of the important forest resources, but its utilization is much smaller,and caused a great waste.The experimental research was conducted by using bamboo residues on a laboratory designed pyrolysis system,in which a microwave oven was adopted as the main part of the system. The research process is full use of Bamboo Residues product bio-oil by means of microwave pyrolysis technology, and extracts from phenolic antioxidants as bio-diesel antioxidants,which called Bio-oil Based Biodiesel Antioxidant (BBBA).Based on the research of bio-oil extraction and production process, using Basic Aqueous-Organic Solvent Extraction,the effects of key parameters such as raw material moisture content, pyrolysis time,pyrolysis temperature, pyrolysis power input and catalyst on the microwave pyrolysis products were determined.Using "Box-Behnken," the process of microwave pyrolysis of bamboo residues for bio-oil preparation was optimized, the optimal parameters determined as pyrolysis power of 900W, time of 28min, and SiC amount of 28.6% (wt.% bamboo residues), and 10% water content.The optimum conditions were also validated to obtain with 8.7h of oxidation induction time.The results of GC-MS analysis showed that the method of Basic Aqueous-Organic Solvent Extraction is a good method for separating phenolic compounds from the light bio-oil, and antioxidant substances have accounted for 72.507 percent(waste oil biodiesel).The result in BBBA is high effective, renewable biodiesel antioxidant and is excellent at oil-soluble performance.The antioxidation effectiveness of the BBBA is always higher then conventional chemical synthetic antioxidants, such as tert-butylhydroquinone(TBHQ),butylatedhydroxyanisole(BHA),butyl-4-methylphenol (BHT), and ascorbic acid (Vt.C).According to the results, copper,iron and zinc can catalyze oxidation, especially, copper and zinc in particular can be highly active for initiating oxidation of polyunsaturated methyl esters. In order to enhance the BBBA of the antioxidant properties and ability to resist metal, select the citric acid and ascorbic acid as a bio-oil extract synergies synergist. The best compound ratio:70% BBBA+20% citric acid+10% ascorbic acid (w/w).The results suggested that illumination greatly increase the biodiesel degradation rate.Therefore, the long-term storage of biodiesel should be kept indoors and dark place. When the room under the dark conditions, the waste oil biodiesel, Swida oil biodiesel and rapeseed biodiesel requirements were added,0.08%,0.06% and 0.04% (w/w) can meet their needs(6 months shelf life)...
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