| Algae biodiesel known as the third generation of biodiesel,with renewable,excellent environmental characteristics and do not take the advantages of arable land.Chlorella is a very common algae,distributed throughout the country,is a good raw material for algae biodiesel.In this paper,the preparation technology,physical and chemical properties and combustion reaction kinetics model of bacillus biodiesel were studied,which provided a theoretical basis for further studying the combustion process of bacillus baccatin and promoting the application and popularization of baccatin.The effects of different factors on the yield of biodiesel by direct transesterification,from Chlorella vulgaris were studied orthogonal experiment and neural network.The effects of different factors on the yield of biodiesel,Optimized the preparation process conditions.The results showed that the grinding method was 20 minutes and the ultrasonic wave was 40 minutes to achieve better breaking effect.The technological conditions were methanol 40 ml,reaction temperature 75 ℃,reaction time 9 hours,stirring speed 720r/min,oil production rate up to 2.6 %.The components and contents of biodiesel from Chlorella pyrenoidosa were determined by gas chromatography-mass spectrometry(GCMS).The density,viscosity and pour point of biodiesel were measured by density meter and viscometer.Based on the formula and content of the components of biodiesel from Chlorella vulgaris,the cetane number and low calorific value of bacillus biodiesel were calculated by using the formula of physical parameter estimation,and compared with the national standard of diesel and biodiesel.The results showed that the biodiesel density was 0.866 g / mL,the cetane number was 52,the kinematic viscosity was 4.33mm2·s-1,the calorific value was 39.66MJ·kg-1 and the ester content was 96.7%.Chlorella biodiesel physical and chemical indicators meet the national standards of biodiesel.The types and proportions of the substitutes of biodiesel from Chlorella vulgaris were determined by caloric value,relative molecular mass,hydrocarbon mass fraction,oxygen content and cetane number.The "superposition method" was used to construct chlorella Combustion Reaction Kinetics Model of Biodiesel.The ignition delay period of biodiesel in Chimera was calculated by using Chemkin-pro software,and the simulation results were compared with the experimental results in the literature.The results showed that the kinetic model of the combustion reaction of chlorella biodiesel could be used to predict the ignition delay of biodiesel Period;the model includes 3563 substances,11194 basis reaction,large scale,need to be simplified.Based on the directed relation graph with error propagation(DRGEP),a simplified program was prepared in Fortran language for different simplified targets.The detailed combustion reaction dynamics model of baccatin was simplified and the model was simplified.Computational efficiency and predictive performance.The results show that the maximum error of OH is not more than 10%,the final error of CO2 and H2 O does not exceed 5%,and the final concentration error of CO2 is less than 5%.The simplified model contains 216,78,55,species,the number of elementary reactions were 1021,252,160;.With the decrease of model size and the computational efficiency,the computational efficiency of the three simplified models is higher than that of the original model.The calculation error of the three simplified models is 0.3%,1.1% and 2% respectively when the molar fraction of methyl decanoate changes with time.The simplified model is used to improve the computational efficiency.At the same time,can maintain a good predictive performance. |
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