Defluidization phenomena during the pyrolysis of two plastic wastes

被引:75
作者
Arena, U
Mastellone, ML
机构
[1] Univ Naples Federico II, Dept Chem Engn, I-80125 Naples, Italy
[2] Univ Naples 2, Dept Environm Sci, I-81100 Caserta, Italy
关键词
agglomeration; defluidization; fluidization; plastic waste; polymers; pyrolysis;
D O I
10.1016/S0009-2509(99)00533-3
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A couple of commercially available packaging-derived fuels, both obtained as a result of mono-material recycling programs of polyethylene (PE) and polyethylene terephthalate (PET), were fed in a laboratory scale bubbling fluidized-bed reactor, made of quartz. The effect of the main operating variables (bed solids hold-up, inert material size, fluidizing velocity, plastics feed rate) on the agglomeration and the defluidization phenomena was investigated by means of experiments carried out in the bed temperature range of 450-650 degrees C. Different mechanisms of defluidization were identified and characterized. The time at which defluidization occurred was correlated to the ratio between the bed solids hold-up and the polymer feed rate by means of linear relationships. An increase of this ratio, as well as a decrease of the bed temperature, led to a decrease of the defluidization time for both the recycled polymers. No substantial effects were found in the tested range of fluidizing gas velocities. An operating criterion to avoid defluidization was finally proposed. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2849 / 2860
页数:12
相关论文
共 9 条
[1]   The phenomenology of comminution in the fluidized bed combustion of packaging-derived fuels [J].
Arena, U ;
Cammarota, A ;
Mastellone, ML .
FUEL, 1998, 77 (11) :1185-1193
[2]  
Gluckman M. J., 1976, FLUIDIZATION TECHNOL, V1, P395
[3]   Thermal degradation of mixed plastic waste to aromatics and gas [J].
Kaminsky, W ;
Schlesselmann, B ;
Simon, CM .
POLYMER DEGRADATION AND STABILITY, 1996, 53 (02) :189-197
[4]   AGGLOMERATION AND DEFLUIDIZATION UNDER SIMULATED CIRCULATING FLUIDIZED-BED COMBUSTION CONDITIONS [J].
MANZOORI, AR ;
AGARWAL, PK .
FUEL, 1994, 73 (04) :563-568
[5]   Carbon attrition during the circulating fluidized bed combustion of a packaging-derived fuel [J].
Mastellone, ML ;
Arena, U .
COMBUSTION AND FLAME, 1999, 117 (03) :562-573
[6]   Combustion and gasification properties of plastics particles [J].
Zevenhoven, R ;
Karlsson, M ;
Hupa, M ;
Frankenhaeuser, M .
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, 1997, 47 (08) :861-870
[7]  
[No title captured]
[8]  
[No title captured]
[9]  
[No title captured]