The traditional oil chemical process of waste plastics has the problems of low oil quality, low efficiency and low yield. After investigation, the following technical pain points exist in the industry: intermittent process lacks pretreatment process, impurities account for more than 25%, low oil quality; coking, wax and toxic gas pollution during cracking process.The co-solution synergy experiment of low-grade coal and plastic was carried out by using the integrated annular reactor device and adding acid titanium catalyst, which overcame the problems of high oiled coke wax rate, low oil yield and poor low temperature effect of waste plastics.

Wenyu Sun, Cong Ren, Feifei Wang, Mingshuo Xia, Yunqing Wang, Qingyu Shang. Study on thermal cracking of waste PE plastics. Academic Journal of Environment & Earth Science (2024), Vol. 6, Issue 2: 25-29. https://doi.org/10.25236/AJEE.2024.060204.

[1] Salma Belbessai,Abir Azara,Nicolas Abatzoglou. Recent advances in the decontamination and upgrading of waste plastic pyrolysis products:Anoverview[J].Processes,2022,10(4):733.

[2] Huang J J,Veksha A,Chan W P,et al. Chemical recycling ofplastic waste for sustainable material management: A pro⁃spective review on catalysts and processes[J]. Renewable &Sustainable Energy Reviews,2022,154:111866.

[3] Li C, Zhang C T, Gholizadeh M, et al. Different reactionbehaviours of light or heavy density polyethylene during thepyrolysis with biochar as the catalyst[J]. Journal of Hazard⁃ous Materials, 2020,399:123075.

[4] Park K - B,Jeong Y - S,Guzelciftci B,et al. Characteris⁃tics of a new type continuous two - stage pyrolysis of wastepolyethylene[J]. Energy,2019,166: 343 - 351.

[5]Muhammad,Chika,Onwudili,et al. Thermal degradation ofreal - world waste plastics and simulated mixed plastics ina two - stage pyrolysis - catalysis reactor for fuel production[J]. Energy & Fuels, 2015,29(3 / 4):2601 - 2609.

[6] Honus S,Kumagai S,Fedorko G,et al. Pyrolysis gases pro⁃duced from individual and mixed PE, PP, PS, PVC, and PET - Part I:Production and physical properties[J]. Fuel,2018,221:346 - 360.

[7] Liu X,Burra K R G,Wang Z W,et al. Syngas characteris⁃tics from catalytic gasification of polystyrene and pinewood in CO2 atmosphere[J]. Journal of Energy Resources Technology,2021,143(5):052304.

[8] Huang Ming, Zhu Liang, Ding Zixia, et al. The synergistic mechanism of biomass three-component pyrolysis and low-density polyethylene [J]. Journal of Chemical Industry, 2022,73:699-711.

[9] Salma Belbessai,Abir Azara,Nicolas Abatzoglou.Recentadvancesinthe decontamination and upgrading of waste plastic pyrolysis products:Anoverview[J].Processes,2022,10(4):733.

[10] Cheng Wei. CleanPlanetEnergy The company has launched two kinds of super-clean Marine fuels produced from waste plastic [J]. Petroleum refining and Chemical Industry, 2021,52 (8): 107.

[11] LiNing, Liu Hengxin,ChengZhanjun,etal.Conversionof plasticwasteintofuels:A criticalreview[J]. Journalof HazardousMaterials,2022,424:127460.

[12] Hao Qingquan, Liu Zongpeng, Zhu Jianhua. Thermodynamics and reaction mechanism of organochloride identification and hydrogenation and dechlorination in waste plastic pyrolysis oil [J]. Petrochemical Industry, 2020,49 (1): 48-55.

[13] Baena-GonzálezJ,Santamaria-EchartA,AguirreJL,etal.Chemicalrecyclingofplastic waste: Bitumen, solvents, andpolystyrenefrompyrolysisoil[J].WasteManagement,2020,118:139-149

[14] Wei Xinjia, Liu Boyang, Wang Ming, et al. Research progress of waste plastic cracking and refining of plastic oil [J]. Industrial Catalysis, 2019,27 (2): 31 – 34.

[15] WILLIAMS P T, SLANEY E.Analysis of products from the pyrolysis and liquefaction of single plastics and waste plastic mixtures [J].Resources Conservation and Recycling, 2007, 51(4): 754-769.

[16] GENUINO H C, RUIZ M P, HEERES H J, et al.Pyrolysis of mixed plastic waste (DKR-350): effect of washing pre-treatment and fate of chlorine[J].Fuel Processing Technology, 2022, 233,107304.

[17] MISKOLCZI N, BARTHA L, ANGYAL A.Pyrolysis of polyvinyl chloride (PVC)-containing mixed plastic wastes for recovery of hydrocarbons[J].Energy & Fuels, 2009, 23(5): 2743-2749.