Thermal Degradation of LDPE-Vacuum Gas Oil Mixtures for Plastic Wastes Valorization
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- 作者：Antonio Marcilla ; Á ; ngela N. Garcí ; a ; Maria del Remedio Herná ; ndez
- 刊名：Energy & Fuels
- 出版年：2007
- 出版时间：March 2007
- 年：2007
- 卷：21
- 期：2
- 页码：870 - 880
- 全文大小：452K
- 年卷期：v.21,no.2(March 2007)
- ISSN：1520-5029
文摘
The thermal degradation of blends of different percentages of low-density polyethylene (LDPE) in vacuumgas oil (VGO) has been carried out in a fluidized-bed reactor. A wide range of percentages of the polymer hasbeen selected for the study, including 0, 5, 25, 75, and 100% LDPE by weight. The strategy of mixing plasticswith a solvent to be degraded avoids the possible heat-transfer limitations and other problems present in thecracking of solid plastics. A temperature of 500 
C has been selected as the degradation temperature in orderto simulate industrial conditions of a refinery and, in this way, to evaluate the applicability of the productsgenerated. The results show a significant increase of the volatile yields by increasing the amount of LDPEpresent in the blend, dry gas, and liquefied petroleum gas, increasing with the percentage of polymer mixedwith VGO. Condensable products exhibit a decrease of their yield with this variable. The influence of thetemperature at the exit of the reactor is also evaluated in the present work. Significant differences have beenobserved in the product distribution as a function of this parameter, showing the importance of the temperatureprofile on the results obtained in this type of reactor. The methodology shown in the present work couldsuggest the possibility of using a refinery stream of secondary interest (such as the VGO employed) and,simultaneously, recycling plastics, reducing the environmental problems they cause.
C has been selected as the degradation temperature in orderto simulate industrial conditions of a refinery and, in this way, to evaluate the applicability of the productsgenerated. The results show a significant increase of the volatile yields by increasing the amount of LDPEpresent in the blend, dry gas, and liquefied petroleum gas, increasing with the percentage of polymer mixedwith VGO. Condensable products exhibit a decrease of their yield with this variable. The influence of thetemperature at the exit of the reactor is also evaluated in the present work. Significant differences have beenobserved in the product distribution as a function of this parameter, showing the importance of the temperatureprofile on the results obtained in this type of reactor. The methodology shown in the present work couldsuggest the possibility of using a refinery stream of secondary interest (such as the VGO employed) and,simultaneously, recycling plastics, reducing the environmental problems they cause.