New Method Exploration For Proparetion Of Bio-jet-fuel And C₁-derived Bioethanol

In this thesis,the process to produce jet fuel from fatty alcohol and a novel method to produce bioethanol from C1 compounds in microorganism were explored.For jet fuel preparation from fatty alcohol,the main research contents and results are as follows:1)The dehydration reaction of fatty alcohols on three acid molecular sieve catalysts of A1-MCF,ZSM-22 and ZSM-5 were investigated,and the conditions for temperature and space velocity were optimized.It was found that fatty alcohol could selectively dehydrate and produce direct chain olefins on Al-MCF,while 50%heterogeneity on ZSM-22,and a large number of aromatization on ZSM-5;2)The acid property and structures of molecular sieves were characterized,and then the relationship between acid property and transition state shape-selectivity with reaction product wer established,besides,the reaction mechanism was studied and discussed;3)the hydrogenation reaction of fatty alcohol on the Pt/Al-MCF and Pt/ZSM-22 bifunctional catalyst was explored,and the results showed that,in the case of hydrogenation,fatty alcohol was converted into n-alkane with high selectivity on the Pt/Al-MCF,and more than 60%of the isomalkanes were generated on Pt/ZSM-22,which met the requirements of the ratio of n-alkane and isomerized alkane in the bio-jet fuel of 1:1;4)based on above experiments,the suitable process of preparing jet fuel from fatty alcohol was selected,and the test was carried out in the pilot plant,and its products were tested.Except the density,all indexes fit.Research contents of preparation of ethanol from C1 compounds were shown as follows:1)Optimization of pH,reducing agent and other growth condition of strain P7 were determined,and the pH tolerance range of P7 and the kind and the addition amount of the reducing agent were investigated.2)Under the condition of different pH,the tolerance degree of fonnate were explored,and then whether the strains can use the formate as a carbon source for growth and production was explored.And the results showed that pH=7 was most favorable for formate utilization.There was a minimum concentration for formate utilization,only when the concentration is higher than a certain value,the strain can utilize formate as carbon source for growth,and ethanol production.3)The process of producing ethanol with CO and formate as the common carbon souece was explored,and the results showed that the synergistic utilization of the two could reach higher biomass and ethanol yield than the single carbon source,which was beneficial to the efficient utilization of carbon atom.