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| Preparation of bio-based hydrocarbons by co-catalytic pyrolysis of waste plastics and kitchen waste oil with methanol |
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| DOI： |
| KeyWord:mixed waste plastics kitchen waste oil co-catalytic pyrolysis bio-based hydrocarbons |
| FundProject:国家自然科学基金（51466004） |
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| Abstract: |
| In order to make better use of waste plastics in agricultural production, and kitchen waste oil the effects of methanol additions on the co-catalytic pyrolysis of mixed waste plastics and kitchen waste oil to prepare bio-based hydrocarbons at different reaction temperatures were investiated by using agricultural mixed waste plastics and kitchen waste oil as raw materials and NaY zeolite as catalyst. The optimum reaction conditions of co- catalytic pyrolysis of mixed waste plastics and kitchen waste oil were determined by the yield of liquid products, the yield of combustible gas, the acid value of liquid products and the coking rate of catalyst. The composition of the liquid products obtained under the optimum reaction conditions was analyzed, and the physicochemical indexes of the liquid products were compared with biodiesel. At the same time, the co-catalytic pyrolysis reaction mechanism of mixed waste plastics and kitchen waste oil was analyzed. The results showed that the addition of methanol might generally beneficial to improve the yield of liquid products, reduce the acid value of liquid products, the yield of combustible gas and the coking rate of catalyst. The optimum reaction conditions of co- catalytic pyrolysis were determined as follows: reaction temperature 440 ℃, methanol dosage 5%. Under the optimum conditions, the yield of liquid products reached 78.52%, the acid value of liquid product was reduced to 0.59 mgKOH/g, and the coking rate of catalyst was reduced to 6.06%. Compared with the absence of methanol, the relative contents of aromatic hydrocarbons and olefins in the composition of the liquid product decreased after adding 5% methanol, while the relative content of alkanes increased significantly. The performance of the liquid products (hydrocarbon fuel) was better than that of biodiesel. Adding 5% methanol might promote the generation of alkanes due to a synergistic hydrogenation reaction occuring between the mixed waste plastic and kitchen waste oil under the action of NaY zeolite catalyst. In summary, co-catalytic pyrolysis of mixed waste plastics and kitchen waste oil with methanol is an effective way to prepare hydrocarbon fuel. |
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