Abstract
The co-liquefaction of lignite coal and used tire was performed in a 250-ml batch reactor, in supercritical water under a nitrogen atmosphere to investigate the effects of temperature (380-440℃), water/feedstock ratio (4/1-10/1 (wt./wt.)) and the % used tire content in the feedstock (0-100 wt.%) on the conversion efficiency, liquid yield and oil composition attained. The maximum conversion and oil yield were 67 and 50%, respectively, obtained at 400℃ at 1 min, with water/feedstock ratio of 10/1 and 80% used tire content. The distillation characteristics of the oil products, analyzed by simulated distillation gas chromatography, revealed that the oil composition depended significantly on the reaction temperature. The co-liquefaction of coal and used tire yielded a synergistically increased level of oil production. Moreover, the total conversion level obtained with co-liquefaction alone was almost equal to those obtained in the presence of either Fe2O3 or NiMo as catalysts, under the same conditions. Therefore, supercritical water is a good medium for the dissolution of the volatile matter from a coal and used tire matrix.
Highlights
In recent years, the growth in tire consumption has continued to expand concomitantly leading to the problem of the disposal of an ever increasing number of essentially non-biodegredable but flammable spent scrap tires without causing environmental pollution
The co-liquefaction of lignite coal and used tire was performed in a 250-ml batch reactor, in supercritical water under a nitrogen atmosphere to investigate the effects of temperature (380-440°C), water/feedstock ratio (4/1-10/1) and the % used tire content in the feedstock (0-100 wt.%) on the conversion efficiency, liquid yield and oil composition attained
The total conversion and liquid yield obtained from the co-liquefaction of coal and waste tire attained were 66 and 50%, respectively, at the optimum reaction condition of 400°C for 1 min, with wa
Summary
The growth in tire consumption has continued to expand concomitantly leading to the problem of the disposal of an ever increasing number of essentially non-biodegredable but flammable spent scrap tires without causing environmental pollution (including combustion). Currently perhaps only 60-70% of all used tires are recycled, and evens this requires the use of environmentally and economically costly processes including the use of solvents like n-hexane, toluene and tetralin [2,3]. The well-developed techniques used in coal utilization should theoretically be applicable to the pyrolytic destruction of waste tires and there has been an increasing amount of attention paid to the co-utilization of coal and waste tires. Given that coal liquefaction is enhanced by the addition of crude oil [4] which is a source of rubber constituents in tires, the coliquefaction of coal and used tires is of obvious interest
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
