The Process Of Biodiesel Preparation From Xanthoceras Sorbifolia Kernel Oil

Petroleum reserve is on the decline, the petroleum crisis overshadowed all over the world. Moreover, with modern industrial development and modem civilization and human progress, people's demand increases rapidly, biodiesel as petroleum products are being payed more attention.The paper reviewed the development of biodiesel status. Select the special energy tree in the Notrh-Xanthoceras sorbifolia as the biodiesel raw material for the first time. The procedure of base-catalyzed transesterification reaction of Xanthoceras sorbifolia kernel oil was optimized.The results are as follows:1. RP-HPLC-RI method for simultaneous determination of biodeisel was developed as follows:Chromatographic column HIQ SIL C18V (250 mm×4.6 mm I.D. with pre-column 30 mm×4.6 mm I.D.), mobile phase methanol, flow rate 1 mL/min, injection volume 10μL, column temperature 40℃.All calibration curves showed good linearity (r~2＞0.99) within test concentration ranges. The developed method was shown to be fast and accurate to separate reaction mixtures and calculate reaction yields.2. Comparison four extraction methods of oil (dipping extraction, soxhlet extraction, ultrasonic Extraction and microwave extraction)by single factor and orthogonal experimental on Xanthoceras sorbifolia kernel oil: Dipping extraction at room temperature dipping 3d, the materials to solvent ratio 1:10, extraction attained 60％; Soxhlet extraction extract 6h at 85℃, the materials to solvent ratio 1:7, extraction reached 59.2％; Ultrasonic Extraction extract 90 minutes at room temperature, the materials to solvent ratio 1:5, extraction reached 59.1％; Microwave Extraction extract 15 min at 50℃, the materials to solvent ratio 1:5, extraction reached 56.5％. Results showed ultrasonic and microwave extraction methods had a lower solvent consumption, shorter time, the higher extraction yield and lower cost, those two methods provided scientific reference for preparation of Xanthoceras sorbifolia kernel oil.3. Xanthoceras sorbifolia kernel oil was analyzed by GC-MS, it had 94.36％unsaturated fatty acids, the main components were 9,12-Octadecadienoic acid (43.89％) and 13-Octadecenoic acid (31.03％), which were suitable to be alternative fuel materials.4. Optimization of biodiesel preparation with KOH as a base-catalyst. Four principal variables, molar ratio of methanol to oil, amount of catalyst, reaction temperature and reaction time, affecting the yield of alkali-catalyzed production ofbiodiesel were investigated. Conditions for mechanical agitation transesterification: temperature 65℃, the molar ratio of methanol to oil 6: 1, 1％wt catalyst, reaction time 40 min, the conversion rate was about 96％.Conditions for microwave transesterification: temperature 60℃, the molar ratio of methanol to oil 6: 1, 1％wt catalyst, reaction time 5 min, the conversion rate was about 94％.According to the above results, microwave transesterification was chosed as the following reaction energy.5. The biodiesel production was detected by Heilongjiang Province Academe of Quality Text, it's quality can reach the international standards, such as the United States biodiesel standard ASTM D6751 and German biodiesel standard DIN V5166. The sulfur content in the. biodiesel production from Xanthoceras sorbifolia kernel oil was very low, therefore SOx emissions dropped drastically.This research gives significantly theoretical and practical references to resolve Chinese energy shortage problems. It offers scientific basis and technical parameters for the preparation of biodiesel from Xanthoceras sorbifolia kernel oil in large scale production.