Co-Liquefaction of Elbistan Lignite with Manure Biomass; Part 3 - Effect of Reaction Time and Temperature

World Multidisciplinary Earth Sciences Symposium 2017

Koyunoglu, Cemil^1 ; Karaca, Hüseyin^2

Yalova University, Department of Energy System Engineering, Yalova

77100, Turkey^1

Inonu University, Department of Chemical Engineering, Elazig Road 15. km, Malatya

44100, Turkey^2

关键词: Co-liquefaction;    High temperature;    Liquefaction process;    Liquefaction products;    Optimum temperature;    Product yields;    Residence time;    Solid residues;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/4/042075/pdf
DOI  :  10.1088/1755-1315/95/4/042075

来源: IOP

【 摘 要 】

Most of the liquefaction process were carried out in a batch reactor, in which the residence time of the liquefaction products is long enough to favour the retrogressive reactions. To minimize retrogressive reactions, the liquefaction of coal was carried out in a flowing solvent reactor in which a fixed bed of coal is continuously permeated by hot solvent. Solvent flowing through the coal bed carries the liquefaction products out of the reactor. Unlike experiments carried out under similar conditions in a batch reactor no increase in solid residue is observed during long time high temperature runs in the flowing solvent reactor. There is a greater appreciation of the importance of retrograde, or polymerization, reactions. If the free radicals formed when coal breaks down are not quickly capped with hydrogen, they react with each other to form large molecules that are much harder to break down than the original coal. Reaction time impacts both the co-liquefaction cost and the product yield. So as to study this idea, the experiments of Elbistan Lignite (EL) with manure co-liquefaction carried out by changing the reaction time from 30 to 120 minutes. As a result, the greatest oil products yields obtained at 60 minutes. Therefore, by thinking about the oil products yield values acquired, the optimal reaction time was obtained to be 60 minutes for Elbistan lignite (EL) with manure liquefied with the temperature of 350°C and 400°C. Above 425°C did not examine because solvent (tetraline) loses its function after 425 °C. The obtained optimum temperature found 400°C due to higher total conversion of liquefaction products and also oil+gas yields.