Study on interaction between plastic with wax (heavy oil) in process of catalytic co-pyrolysis

YU Dongxue; HUI Helong; HE Jingdong; LI Songgeng

doi:10.11949/0438-1157.20190114

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Study on interaction between plastic with wax (heavy oil) in process of catalytic co-pyrolysis

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- Study on interaction between plastic with wax (heavy oil) in process of catalytic co-pyrolysis
- CIESC Journal Vol. 70, Issue 8, Pages: 2971-2980(2019)
- 作者机构：
  
  1.中国科学院过程工程研究所多相复杂系统国家重点实验室，北京 100190
  2.中国科学院大学化学工程学院，北京 100049
  3.中国科学院，北京 100049
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20190114
  CLC： X 705
- Received：11 February 2019，
  
  Revised：2019-05-21，
  
  Online First：24 July 2026，
  
  Published：05 August 2019
- 稿件说明：
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于冬雪, 惠贺龙, 何京东, 李松庚. 塑料与蜡（重油）催化共热解相互作用研究[J]. 化工学报, 2019, 70(8): 2971-2980

YU Dongxue, HUI Helong, HE Jingdong, LI Songgeng. Study on interaction between plastic with wax (heavy oil) in process of catalytic co-pyrolysis[J]. CIESC Journal, 2019, 70(8): 2971-2980
于冬雪, 惠贺龙, 何京东, 李松庚. 塑料与蜡（重油）催化共热解相互作用研究[J]. 化工学报, 2019, 70(8): 2971-2980 DOI： 10.11949/0438-1157.20190114.

YU Dongxue, HUI Helong, HE Jingdong, LI Songgeng. Study on interaction between plastic with wax (heavy oil) in process of catalytic co-pyrolysis[J]. CIESC Journal, 2019, 70(8): 2971-2980 DOI： 10.11949/0438-1157.20190114.

摘要

采用低密度聚乙烯（LDPE）和固体石蜡（WAX）分别作为塑料及重油的模型化合物，以HZSM-5为反应催化剂，通过热重实验进行热解特性及动力学分析，研究了二者在热解行为上的相互作用；并结合固定床反应器对比研究单独热解及不同原料配比下共热解的产物分布，考察了共热解过程相互作用对热解产物的影响规律。结果表明，LDPE与WAX共热解过程二者间相互作用增强，表现为促进反应物的热解失重，降低了原料的特征热分解温度及反应活化能，显著提高了热解油中C

21-

轻油馏分及芳烃的选择性，而油中C

21+

重油馏分的选择性及固体残渣产率均降低；而且随着共热解原料中WAX比例的增加二者间的相互作用不断增强；基于模型化合物水平初步验证了塑料与裂解重油共热解制备高品质轻质燃油工艺的可行性与技术优势。

Abstract

Low density polyethylene (LDPE) and paraffin wax (WAX) were used as model compounds for plastics and heavy oils respectively. HZSM-5 was used as the reaction catalyst. The pyrolysis characteristics and kinetic analysis were carried out by thermogravimetric experiments. In product distributions respect

the influence of the co-pyrolysis interaction was discussed by individual pyrolysis of feedstock and co-pyrolysis at different ratios using fixed bed reactor. The results showed that

there was a strong interaction between LDPE and WA

which accelerated the rate of mass loss and decreased the characteristic degradation temperature and the apparent activation energy. For pyrolysis products

the selectivity of light oil (C

21-

) and aromatics were increased

and the selectivity of heavy oil (C

21+

) and the yield of solid residues were reduced. Moreover

it was found that the interaction could be enhanced by the increase of WAX content. The results of material balance calculation based on model compounds preliminarily validated that there were practical feasibility and technological advantages to produce high-quality fuel oil by catalytic co-pyrolysis of plastic with its cracking heavy oil.

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references

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