化工学报 ›› 2019, Vol. 70 ›› Issue (12): 4856-4863.DOI: 10.11949/0438-1157.20190619
李传强1,3(),刘思媛1,王东升2,刘书彬1,郑旭煦1,袁小亚1
收稿日期:
2019-06-04
修回日期:
2019-09-05
出版日期:
2019-12-05
发布日期:
2019-12-05
通讯作者:
李传强
作者简介:
李传强(1983—),男,博士,副教授,基金资助:
Chuanqiang LI1,3(),Siyuan LIU1,Dongsheng WANG2,Shubin LIU1,Xuxu ZHENG1,Xiaoya YUAN1
Received:
2019-06-04
Revised:
2019-09-05
Online:
2019-12-05
Published:
2019-12-05
Contact:
Chuanqiang LI
摘要:
以废旧线性低密度聚乙烯(LLDPE)为原料,采用压力反应釜在封闭条件下通过热裂解方法制备聚乙烯蜡(PE蜡),研究了裂解时间、温度和压力对产物的产率、分子量和滴熔点的影响,并通过红外光谱对产物的官能团进行了分析。实验结果表明,在裂解时间为15~60 min,裂解温度约为260℃的条件下,LLDPE裂解所得到的PE蜡性能较佳,其主要成分为直链烷烃和烯烃,滴熔点大于100℃,黏均分子量处于1400~4700;由动力学分析可知,由于封闭反应体系增加了反应压力,降低了裂解温度和活化能,促进了LLDPE裂解反应进行,同时抑制了气体分子的产生,有利于获得PE蜡。
中图分类号:
李传强, 刘思媛, 王东升, 刘书彬, 郑旭煦, 袁小亚. 压力反应釜中低温热裂解废旧LLDPE塑料制备PE蜡[J]. 化工学报, 2019, 70(12): 4856-4863.
Chuanqiang LI, Siyuan LIU, Dongsheng WANG, Shubin LIU, Xuxu ZHENG, Xiaoya YUAN. Preparation of PE wax by pyrolysis of LLDPE waste plastic in a pressure reactor under low temperature[J]. CIESC Journal, 2019, 70(12): 4856-4863.
裂解温度/℃ | 滴熔点/℃ | 黏均分子量 |
---|---|---|
200 | 124 | 10286 |
220 | 120 | 8417 |
240 | 118 | 7861 |
260 | 110 | 2489 |
280 | 108 | 1027 |
300 | 101 | 846 |
表1 不同裂解温度下所得固体产物的滴熔点和黏均分子量
Table 1 Drop melting point and viscosity-average molecular weight of products
裂解温度/℃ | 滴熔点/℃ | 黏均分子量 |
---|---|---|
200 | 124 | 10286 |
220 | 120 | 8417 |
240 | 118 | 7861 |
260 | 110 | 2489 |
280 | 108 | 1027 |
300 | 101 | 846 |
温度/℃ | 压力/MPa | |||
---|---|---|---|---|
15 min | 30 min | 45 min | 60 min | |
240 | 0.2 | 1.0 | 1.2 | 1.5 |
260 | 0.4 | 1.6 | 2.6 | 3.2 |
280 | 0.6 | 2.0 | 3.7 | 4 |
表2 不同裂解条件下釜内的压力
Table 2 Pressure of reactor under different pyrolysis conditions
温度/℃ | 压力/MPa | |||
---|---|---|---|---|
15 min | 30 min | 45 min | 60 min | |
240 | 0.2 | 1.0 | 1.2 | 1.5 |
260 | 0.4 | 1.6 | 2.6 | 3.2 |
280 | 0.6 | 2.0 | 3.7 | 4 |
裂解时间/min | 滴熔点/℃ | 黏均分子量 |
---|---|---|
15 | 112 | 4683 |
30 | 110 | 2489 |
45 | 108 | 2135 |
60 | 104 | 1429 |
120 | 102 | 943 |
表3 在260℃不同裂解时间所得PE蜡的滴熔点和黏均分子量
Table 3 Drop melting point and viscosity-average molecular weight of PE wax obtained at different pyrolysis time under 260℃
裂解时间/min | 滴熔点/℃ | 黏均分子量 |
---|---|---|
15 | 112 | 4683 |
30 | 110 | 2489 |
45 | 108 | 2135 |
60 | 104 | 1429 |
120 | 102 | 943 |
1 | Panda A K , Singh R K , Dishrag D K . Thermolysis of waste plastics to liquid fuel: a suitable method for plastic waste management and manufacture of value added products—a world prospective [J]. Renewable & Sustainable Energy Reviews, 2010, 14(1): 233-248. |
2 | Hamad K , Kaseem M , Deri F . Recycling of waste from polymer materials: an overview of the recent works [J]. Polymer Degradation and Stability, 2013, 98(12): 2801-2812. |
3 | Al-Salem S M , Bumajdad A , Khan A R , et al . Non-isothermal degradation kinetics of virgin linear low density polyethylene (LLDPE) and biodegradable polymer blends[J]. Journal of Polymer Research, 2018, 25: 111-126. |
4 | Onwudili J A , Insura N , Williams P T . Composition of products from the pyrolysis of polyethylene and polystyrene in a closed batch reactor: effects of temperature and residence time [J]. Journal of Analytical and Applied Pyrolysis, 2009, 86(2): 293-303. |
5 | Aguado J , Serrano D P , Escola J M . Fuels from waste plastics by thermal and catalytic processes: a review[J]. Ind. Eng. Chem. Res., 2008, 47: 7982-7992. |
6 | Butler E , Devlin G , McDonnell K . Waste polyolefins to liquid fuels via pyrolysis: review of commercial state-of-the-art and recent laboratory research[J]. Waste Biomass Valor, 2011, 2: 227-255. |
7 | Hazrat M A , Rasul M G , Khan M M K , et al . Utilization of polymer wastes as transport fuel resources — a recent development[J]. Energy Procedia, 2014, 61: 1681-1685. |
8 | Arandes J M , Torre I , Castano P , et al . Catalytic cracking of waxes produced by the fast pyrolysis of polyolefins[J]. Energy & Fuels, 2007, 21: 561-569. |
9 | Ware R L , Rowland S M , Rodgers R P , et al . Advanced chemical characterization of pyrolysis oils from landfill waste, recycled plastics, and forestry residue[J]. Energy & Fuels, 2017, 31: 8210-8216. |
10 | Murata K , Sato K , Sakata Y . Effect of pressure on thermal degradation of polyethylene[J]. Journal of Analytical and Applied Pyrolysis, 2004, 71(2): 569-589. |
11 | Al-Salem S M , Lettieri P , Baeyens J . Recycling and recovery routes of plastic solid waste (PSW): a review[J]. Waste Management, 2009, 29: 2625-2643. |
12 | Sharuddin S D A , Abnisa F , Daud W M A W , et al . A review on pyrolysis of plastic wastes[J]. Energy Conversion and Management, 2016, 115: 308-326. |
13 | Al-Salem S M , Antelava A , Constantinou A , et al . A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)[J]. Journal of Environmental Management, 2017, 197: 177-198. |
14 | 孙宝国 . 日用化工辞典[M]. 北京: 化学工业出版社, 2005: 115-119. |
Sun B G . Daily Chemical Dictionary[M]. Beijing: Chemical Industry Press, 2005: 115-119. | |
15 | 王林, 金秀英, 吴伟, 等 . 微晶蜡和聚乙烯蜡对石蜡性能改进研究[J]. 当代化工, 2018, 47(7): 1383-1386. |
Wang L , Jin X Y , Wu W , et al . Research on performance improvement of paraffin wax with microcrystalline wax and polyethylene wax[J]. Contemporary Chemical Industry, 2018, 47(7): 1383-1386. | |
16 | 崔小明 . 聚乙烯蜡的生产及应用前景[J]. 精细与专用化学品, 2014, 22(2): 33-36. |
Cui X M . Production and application prospect of polyethylene wax[J].Fine and Specialty Chemicals, 2014, 22(2): 33-36. | |
17 | Luo C , Ding F , Zhang H , et al . Wax formation study by the pyrolysis of high density polyethylene[J]. Advanced Materials Research, 2012, 418/419/420: 1673-1676. |
18 | Shang L , Wang S , Zhang Y , et al . Pyrolyzed wax from recycled cross-linked polyethylene as warm mix asphalt (WMA) additive for SBS modified asphalt[J]. Construction and Building Materials, 2011, 25(2): 886-891. |
19 | 王璇, 冀星, 李术元 . 聚乙烯类废塑料制聚乙烯蜡技术进展[J]. 中国工程科学, 2001, 3(12): 90-95. |
Wang X , Ji X , Li S Y . Development of polyethylene wax-making technologies using polyethylene wastes[J]. Engineering Science, 2001, 3(12): 90-95. | |
20 | 史建公, 张殿明 . 热降解法制备聚烯烃蜡技术进展[J]. 科技导报, 2008, 26(11): 87-92. |
Shi J G , Zhang D M . Progress on manufacturing polyolefin wax by thermal degradation[J]. Science and Technology, 2008, 26(11): 87-92. | |
21 | 徐明星, 胡鹏华 . 一种废旧塑料制取聚乙烯蜡的简易方法: 101885857 B[P]. 2012-07-25. |
Xu M X , Hu P H . A simple method for preparing PE wax from waste plastic: 101885857 B[P]. 2012-07-25. | |
22 | 沈劲松, 严宽红, 严柯 . 一种废PE塑料农用薄膜生产氧化聚乙烯蜡的制备方法: 106220758 A[P]. 2016-12-14. |
Shen J S , Yan K H , Yan K . A method for preparing PE wax using waste PE plastic agricultural film: 106220758 A[P]. 2016-12-14. | |
23 | 胡浩斌, 罗应军, 杨军 . 响应面法优化废聚乙烯农膜制备聚乙烯蜡的工艺研究[J]. 环境污染与防治, 2015, 37(9): 39-45. |
Hu H B , Luo Y J , Yang J . Optimization of preparation technology of PEW from waste PE agricultural film by response surface methodology[J]. Environmental Pollution & Control, 2015, 37(9): 39-45. | |
24 | Arabiourrutia M , Elordi G , Lopez G , et al . Characterization of the waxes obtained by the pyrolysis of polyolefin plastics in a conical spouted bed reactor[J]. Journal of Analytical and Applied Pyrolysis, 2012, 94: 230-237. |
25 | Salmiaton A , Garforth A . Waste catalysts for waste polymer[J]. Waste Management, 2007, 27: 1891-1896. |
26 | 王吉林, 王璐璐, 周萍 . 溶剂辅助聚乙烯废塑料裂解制聚乙烯蜡[J]. 现代塑料加工应用, 2010, 22(2): 32-35. |
Wang J L , Wang L L , Zhou P . Production of polyethylene wax from PE waste plastic by solvent supporting pyrolysis[J]. Modern Plastics Processing Applications, 2010, 22(2): 32-35. | |
27 | 梅涛, 迟姚玲, 易玉峰, 等 . 高密度聚乙烯热解生成聚乙烯蜡及产品的性质研究[J]. 石油炼制与化工, 2011, 42(11): 66-69. |
Mei T , Chi Y L , Yi Y F , et al . Study on the preparation and properties of polyethylene wax from pyrolysis of high density polyethylene[J]. Petroleum Processing and Petrochemicals, 2011, 42(11): 66-69. | |
28 | 袁倩, 王璐璐, 封瑞江, 等 . PE废塑料溶剂裂解制备聚乙烯蜡[J]. 化学工程师, 2015, 5(5): 1-7. |
Yuan Q , Wang L L , Feng R J , et al . Preparation of polyethylene wax from waste PE plastics by solvent pyrolysis[J]. Chemical Engineer, 2015, 5(5): 1-7. | |
29 | 张建雨, 于硕, 冯跃跃, 等 . 废旧聚乙烯催化降解制备聚乙烯蜡[J]. 塑料科技, 2010, 38: 51-54. |
Zhang J Y , Yu S , Feng Y Y , et al . Study on PE wax prepared through cracking waste PE[J]. Plastic Science and Technology, 2010, 38: 51-54. | |
30 | 左禹, 丁艳军, 朱琳, 等 . 小型固定床实验台条件下的聚乙烯热解[J]. 清华大学学报 (自然科学版), 2015, 45(11): 1544-1548. |
Zuo Y , Ding Y J , Zhu L , et al . Analysis of polyethylene pyrolysis using a bench scale fixed bed[J]. Journal of Tsinghua University (Science and Technology), 2015, 45(11): 1544-1548. | |
31 | 张振量, 王禹, 项素云, 等 . 聚乙烯蜡的性能及应用[J]. 塑料科技, 2002, (6): 50-53. |
Zhang Z L , Wang Y , Xiang S Y , et al . Application and properties of polyethylene wax[J]. Plastic Science and Technology, 2002, (6): 50-53. | |
32 | 冀星, 钱家麟, 王剑秋 . 聚乙烯聚丙烯树脂及废料的热解[J]. 环境科学, 1999, (5): 82-85. |
Ji X , Qian J L , Wang J Q . The pyrolysis of polyethylene polypropene and its wastes[J]. Environmental Science, 1999, (5): 82-85. | |
33 | Jeon J K , Park Y K . Pyrolysis of an LDPE-LLDPE-EVA copolymer mixture over various mesoporous catalysts[J]. Korean Journal of Chemistry Engineering, 2000, 17(5): 489-496. |
34 | Miteva K , Slavcho K , Bogoeva-Gaceva G . Kinetic analysis of pyrolysis of waste polyolefin mixture[J]. Arabian Journal for Science and Engineering, 2016, 41: 2601-2609. |
35 | Al-Salem S M , Lettieri P . Kinetic study of high density polyethylene (HDPE) pyrolysis[J]. Chemical Engineering Research and Design, 2010, 88: 1599-1606. |
[1] | 程成, 段钟弟, 孙浩然, 胡海涛, 薛鸿祥. 表面微结构对析晶沉积特性影响的格子Boltzmann模拟[J]. 化工学报, 2023, 74(S1): 74-86. |
[2] | 吴雷, 刘姣, 李长聪, 周军, 叶干, 刘田田, 朱瑞玉, 张秋利, 宋永辉. 低阶粉煤催化微波热解制备含碳纳米管的高附加值改性兰炭末[J]. 化工学报, 2023, 74(9): 3956-3967. |
[3] | 汪林正, 陆俞冰, 张睿智, 罗永浩. 基于分子动力学模拟的VOCs热氧化特性分析[J]. 化工学报, 2023, 74(8): 3242-3255. |
[4] | 张蒙蒙, 颜冬, 沈永峰, 李文翠. 电解液类型对双离子电池阴阳离子储存行为的影响[J]. 化工学报, 2023, 74(7): 3116-3126. |
[5] | 杨峥豪, 何臻, 常玉龙, 靳紫恒, 江霞. 生物质快速热解下行式流化床反应器研究进展[J]. 化工学报, 2023, 74(6): 2249-2263. |
[6] | 衣思敏, 马亚丽, 刘伟强, 张金帅, 岳岩, 郑强, 贾松岩, 李雪. 微晶菱镁矿蒸氨及水化动力学研究[J]. 化工学报, 2023, 74(4): 1578-1586. |
[7] | 禹进, 余彬彬, 蒋新生. 一种基于虚拟组分的燃烧调控化学作用量化及分析方法研究[J]. 化工学报, 2023, 74(3): 1303-1312. |
[8] | 陈瑞哲, 程磊磊, 顾菁, 袁浩然, 陈勇. 纤维增强树脂复合材料化学回收技术研究进展[J]. 化工学报, 2023, 74(3): 981-994. |
[9] | 张娜, 潘鹤林, 牛波, 张亚运, 龙东辉. 酚醛树脂热裂解反应机理的密度泛函理论研究[J]. 化工学报, 2023, 74(2): 843-860. |
[10] | 陈晨, 杨倩, 陈云, 张睿, 刘冬. 不同氧浓度下煤挥发分燃烧的化学动力学研究[J]. 化工学报, 2022, 73(9): 4133-4146. |
[11] | 郝泽光, 张乾, 高增林, 张宏文, 彭泽宇, 杨凯, 梁丽彤, 黄伟. 生物质与催化裂化油浆共热解协同作用研究[J]. 化工学报, 2022, 73(9): 4070-4078. |
[12] | 邵健, 冯军宗, 柳凤琦, 姜勇刚, 李良军, 冯坚. 酚醛树脂基炭微球结构调控与功能化制备研究进展[J]. 化工学报, 2022, 73(9): 3787-3801. |
[13] | 肖皓宇, 杨海平, 张雄, 陈应泉, 王贤华, 陈汉平. 塑料催化热解制备高附加值产品的研究进展[J]. 化工学报, 2022, 73(8): 3461-3471. |
[14] | 唐恺鸿, 何晓峰, 徐桂秋, 于洋, 刘啸凤, 葛铁军, 张爱玲. 酚醛泡沫的燃烧行为及阻燃研究进展[J]. 化工学报, 2022, 73(8): 3483-3500. |
[15] | 陈玉弓, 陈昊, 黄耀松. 基于分子反应动力学模拟的六甲基二硅氧烷热解机理研究[J]. 化工学报, 2022, 73(7): 2844-2857. |
阅读次数 | ||||||||||||||||||||||||||||||||||||||||||||||||||
全文 991
|
|
|||||||||||||||||||||||||||||||||||||||||||||||||
摘要 672
|
|
|||||||||||||||||||||||||||||||||||||||||||||||||