Thermogravimetric kinetics of polyethelyne degredation over silicoaluminophosphate

被引：23

作者：

Araujo, AS ^{[1
]}

Fernandes, VJ ^{[1
]}

Fernandes, GJT ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Norte, Dept Chem, BR-59078970 Natal, RN, Brazil

来源：

THERMOCHIMICA ACTA | 2002年 / 392卷

关键词：

model-free kinetics; polyethylene; degradation; silicoalummophosphate; Thermogravimetry;

D O I：

10.1016/S0040-6031(02)00072-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In the current work, we investigated the Thermogravimetric kinetics of degradation of high-density polyethylene (HDPE) alone, and mixed with silicoaluminophosphate catalyst (SAPO-37/HDPE). To estimate the kinetic parameters of the polymer degradation, the Vyazovkin model-free kinetic method was applied. The activation energy (E) was calculated as a function of conversion (alpha) and temperature (T), providing an estimate of the time required for the degradation process at a given temperature. The products due to thermal and catalytic cracking of polyethylene were analyzed by gas chromatography/mass spectrometry (GUMS). The SAPO-37 showed good catalytic activity, decreasing the activation energy for the process. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：55 / 61

页数：7

共 16 条

[1] CATALYTIC THERMAL-DEGRADATION OF POLYMERS DEGRADATION OF POLYPROPYLENE [J].

AUDISIO, G ;

SILVANI, A ;

BELTRAME, PL ;

CARNITI, P .

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 1984, 7 (1-2) :83-90

[2] Mechanisms and kinetics of thermal decomposition of plastics from isothermal and dynamic measurements [J].

Bockhorn, H ;

Hornung, A ;

Hornung, U .

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 1999, 50 (02) :77-101

[3] Thermogravimetric studies on the thermal decomposition of polyethylene [J].

Conesa, JA ;

Marcilla, A ;

Font, R ;

Caballero, JA .

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 1996, 36 (01) :1-15

[4] Thermal and catalytic degradation of high density polyethylene and commingled post-consumer plastic waste [J].

Ding, WB ;

Liang, J ;

Anderson, LL .

FUEL PROCESSING TECHNOLOGY, 1997, 51 (1-2) :47-62

[5] Kinetic parameters of polyethylene degradation by the natural zeolite chabazite [J].

Fernandes, VJ ;

Araujo, AS ;

Medeiros, RA ;

Matos, JR ;

Mercuri, LP ;

Silva, AO ;

Melo, DMA .

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 1999, 56 (03) :1279-1282

[6]

FOUHY K, 1993, CHEM ENG, V12, P30

[7]

KASTNER H, 1995, HYDROCARB PROCESS, V74, P109

[8] INVESTIGATION OF THE KINETICS OF PYROLYSIS OF PVC BY TG-MS-ANALYSIS [J].

KNUMANN, R ;

BOCKHORN, H .

COMBUSTION SCIENCE AND TECHNOLOGY, 1994, 101 (1-6) :285-299

[9] Catalytic conversion of polyolefins to chemicals and fuels over various cracking catalysts [J].

Lin, YH ;

Sharratt, PN ;

Garforth, AA ;

Dwyer, J .

ENERGY & FUELS, 1998, 12 (04) :767-774

[10] Catalytic reactions in waste plastics, HDPE and coal studied by high-pressure thermogravimetry with on-line GC/MS [J].

Liu, K ;

Meuzelaar, HLC .

FUEL PROCESSING TECHNOLOGY, 1996, 49 (1-3) :1-15

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