升温升压过程对聚丙烯在超临界水中降解的影响

CIESC Journal

• PROCESS AND PRODUCT TECHNOLOGY • 上一篇下一篇

升温升压过程对聚丙烯在超临界水中降解的影响

苏磊^1,2; 吴学华^1,3; 刘秀茹¹; 陈丽英¹; 陈克宇⁴; 洪时明¹

¹ Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031, China
² Department of Physics, Zhengzhou University of Light Industry, Zhengzhou 450002, China
³ College of Science, Kunming University of Science and Technology, Kunming 650093, China
⁴ Department of Polymer Science and Technology, Sichuan University, Chengdu 610065,China

收稿日期:2006-10-27 修回日期:1900-01-01 出版日期:2007-10-28 发布日期:2007-10-28
通讯作者: 苏磊

Effect of increasing course of temperature and pressure on polypropylene degradation in supercritical water

SU Lei^1,2; WU Xuehua^1,3; LIU Xiuru¹; CHEN Liying¹; CHEN Keyu⁴; HONG Shiming¹

¹ Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031, China
² Department of Physics, Zhengzhou University of Light Industry, Zhengzhou 450002, China
³ College of Science, Kunming University of Science and Technology, Kunming 650093, China
⁴ Department of Polymer Science and Technology, Sichuan University, Chengdu 610065,China

Received:2006-10-27 Revised:1900-01-01 Online:2007-10-28 Published:2007-10-28
Contact: SU Lei

摘要/Abstract

摘要： The effect of increasing course of temperature and pressure on polypropylene (PP) degradation in supercritical water was investigated for developing a process of recycling waste plastic. A group of experiments was carried out in a reaction system at a pressure of 26MPa, temperature of 380℃ or 400℃ for 30min, 70min, and 120min by Course One (the increasing course of temperature and pressure is via gaseous regions to supercritical regions), and the other group was carried out at corresponding holding conditions by Course Two (the increasing course of temperature and pressure is via liquid regions to supercritical regions). The time of the increasing courses was about 30min. Products were analyzed by Ostward-type viscometer, gaseous chromatography, and mass spectrometers (GC/MS). Characterization results suggested that different increasing courses of temperature and pressure would give rise to different results, although they were treated under the similar holding conditions. It was also found that Course Two was more effective on PP degradation in supercritical water.

关键词: increasing course;polypropylene degradation;supercritical water

Abstract: The effect of increasing course of temperature and pressure on polypropylene (PP) degradation in supercritical water was investigated for developing a process of recycling waste plastic. A group of experiments was carried out in a reaction system at a pressure of 26MPa, temperature of 380℃ or 400℃ for 30min, 70min, and 120min by Course One (the increasing course of temperature and pressure is via gaseous regions to supercritical regions), and the other group was carried out at corresponding holding conditions by Course Two (the increasing course of temperature and pressure is via liquid regions to supercritical regions). The time of the increasing courses was about 30min. Products were analyzed by Ostward-type viscometer, gaseous chromatography, and mass spectrometers (GC/MS). Characterization results suggested that different increasing courses of temperature and pressure would give rise to different results, although they were treated under the similar holding conditions. It was also found that Course Two was more effective on PP degradation in supercritical water.

Key words: increasing course, polypropylene degradation, supercritical water

苏磊, 吴学华, 刘秀茹, 陈丽英, 陈克宇, 洪时明. 升温升压过程对聚丙烯在超临界水中降解的影响[J]. CIESC Journal.

SU Lei, WU Xuehua, LIU Xiuru, CHEN Liying, CHEN Keyu, HONG Shiming. Effect of increasing course of temperature and pressure on polypropylene degradation in supercritical water[J]. .

参考文献

1 Chen, J.Y., Ou, C.F., “Depolymerization of polyethylene terephthalate resin under pressure”, Appl. Polym. Sci., 42, 1501—1507(1991).
2 Cao, W.L., Zhang, J.C., Li, Y., “Application of super-critical fluids technique in the degradation of PET waste”, J. Beijing Univ. Chem. Technol., 26(4), 73—74(1999). (in Chinese)
3 Chen, K.Y., Wang, H.J., Tao, W., “The decomposition of PS in supercritical water”, Environ. Sci. Technol., 21(3), 19—21(1998). (in Chinese)
4 Douglas, L.W., Sungyu, L., “Kinetics and mechanism of styrene monomer recovery from waste polystyrene by SCW partial oxidation”, Adv. Envir. Res., 6(1), 9—16(2001).
5 Liu, Y.R., Qiang, J.L., “Pyrolysis of polystyrene waste in a fluidized-bed reactor to obtain styrene monomer and gaseousoline fraction”, Fuel Process. Technol., 63(3), 45—55(2000).
6 Zheng, F., Janusz, A., “A comparative study of polysty-rene decomposition in supercritical water and air envi-ronments using diamond anvil cell”, Appl. Polym. Sci., 81, 3565—3577(2001).
7 Takehiko, M., Heiji, E., “Characteristics of polyethylene cracking in supercritical water compared to thermal cracking”, Polym. Degrad. Stab., 65(3), 373—386(1999).
8 Mitsuru, S., Zhen, F., Yoshiko, F., “Dissolution and hy-drolysis of cellulose in subcritical and supercritical wa-ter”, Ind. Eng. Chem. Res., 39(8), 2883—2890(2000).
9 Zhang, G.M., Inez, H., “Supercritical water oxidation of ni-trobenzene”, Ind. Eng. Chem. Res, 42(2), 285—289(2003).
10 Masakazu, S., Masahiko, K., Hisao, O., “Oxidation of carbon particles in supercritical water: Rate and mecha-nism”, Ind. Eng. Chem. Res., 43(3), 690—699(2004).
11 Takehiro, M., Motonobu, G., Akio Kodama, “Super-critical water oxidation of a model municipal solid waste”, Ind. Eng. Chem. Res., 39(8), 2807—2810(2000).
12 Meng, L.H., Huang, Y.D., Zhang, Y., Liang, Z.H., “Com-parative study on thermal decomposition of PP and su-percritical water decomposition of polypropylene”, Ma-ter. Sci. Technol., 11(3), 311—314(2003). (in Chinese)
13 Wang, J., Shen, M.Q., Gong, Y.L., Ma, P.S., “Study of polypropylene degradation in supercritical water”, Polym. Mater. Sci. Eng., 20(2), 65—68(2004). (in Chinese)
14 Wu, X.H., Su, L., Liu, X.R., Chen, L.Y., Chen, K.Y., Hong, S.M., “The effect of additive BPO on the depoly-merization of HDPE in supercritical water”, Polym. Ma-ter. Sci. Eng., 22(1), 135—138(2006). (in Chinese)
15 Su, L., Wu, X.H., Liu, X.R., Chen, L.Y., Chen, K.Y., Hong, S.M., “An investigation of polypropylene degra-dation in supercritical water adding dibenzoyl peroxide”, Chin. J. Chem. Eng., 13(6), 845—848(2005).

升温升压过程对聚丙烯在超临界水中降解的影响

Effect of increasing course of temperature and pressure on polypropylene degradation in supercritical water

PDF (PC)

可视化

被引次数

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价