PMID- 17337118
OWN - NLM
STAT- MEDLINE
DCOM- 20070830
LR  - 20081121
IS  - 0304-3894 (Print)
IS  - 0304-3894 (Linking)
VI  - 144
IP  - 3
DP  - 2007 Jun 18
TI  - Product distribution modelling in the thermal pyrolysis of high density 
      polyethylene.
PG  - 708-14
AB  - The thermal fast pyrolysis of high density polyethylene (HDPE) has been carried 
      out in a conical spouted bed reactor in the 450-715 degrees C range, and 
      individual products have been monitored with the aim of obtaining kinetic data 
      for the design and simulation of this process at large scale. Kinetic schemes 
      have been proposed in order to explain both the results obtained in the 
      laboratory plant and those obtained in the literature by other authors operating 
      at laboratory and larger scale. Discrimination has been carried out based on the 
      contribution of the variance of model parameters (stepwise regression) to the 
      total variance explained by the model. The models based on that of Westerhout et 
      al. [R.W.J. Westerhout, J. Waanders, W.P.M. Van Swaaij, Recycling of polyethene 
      and polypropene in a novel bench-scale rotating cone reactor by high-temperature 
      pyrolysis. Ind. Eng. Chem. Res. 37 (6) (1998) 2293-2300] do not adequately 
      predict the experimental results, especially those corresponding to aromatics and 
      char, which is probably due to the very short residence times attained in the 
      conical spouted bed and, consequently, to the lower yields of aromatics and char. 
      The model of best fit is the one where polyethylene degrades to give gas, liquid 
      (oil) and wax fractions. Furthermore, the latter undergoes secondary reactions to 
      give liquid and aromatics, which in turn produce more char.
FAU - Elordi, G
AU  - Elordi G
AD  - Department of Chemical Engineering, University of Basque Country, PO Box 644, 
      48080 Bilbao, Spain.
FAU - Lopez, G
AU  - Lopez G
FAU - Olazar, M
AU  - Olazar M
FAU - Aguado, R
AU  - Aguado R
FAU - Bilbao, J
AU  - Bilbao J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20070130
PL  - Netherlands
TA  - J Hazard Mater
JT  - Journal of hazardous materials
JID - 9422688
RN  - 9002-88-4 (Polyethylene)
SB  - IM
MH  - Hot Temperature
MH  - Kinetics
MH  - *Models, Chemical
MH  - Polyethylene/*chemistry
EDAT- 2007/03/06 09:00
MHDA- 2007/08/31 09:00
CRDT- 2007/03/06 09:00
PHST- 2007/03/06 09:00 [pubmed]
PHST- 2007/08/31 09:00 [medline]
PHST- 2007/03/06 09:00 [entrez]
AID - S0304-3894(07)00168-9 [pii]
AID - 10.1016/j.jhazmat.2007.01.101 [doi]
PST - ppublish
SO  - J Hazard Mater. 2007 Jun 18;144(3):708-14. doi: 10.1016/j.jhazmat.2007.01.101. 
      Epub 2007 Jan 30.