PMID- 22093704
OWN - NLM
STAT- MEDLINE
DCOM- 20120820
LR  - 20161125
IS  - 1879-2456 (Electronic)
IS  - 0956-053X (Linking)
VI  - 32
IP  - 5
DP  - 2012 May
TI  - Pyrolysis of polyolefins for increasing the yield of monomers' recovery.
PG  - 840-6
LID - 10.1016/j.wasman.2011.10.009 [doi]
AB  - Pyrolysis of plastic waste is an alternative way of plastic recovery and could be 
      a potential solution for the increasing stream of solid waste. The objective of 
      this work was to increase the yield the gaseous olefins (monomers) as feedstock 
      for polymerization process and to test the applicability of a commercial 
      Ziegler-Natta (Z-N): TiCl(4)/MgCl(2) for cracking a mixture of polyolefins 
      consisted of 46%wt. of low density polyethylene (LDPE), 30%wt. of high density 
      polyethylene (HDPE) and 24%wt. of polypropylene (PP). Two sets of experiments 
      have been carried out at 500 and 650 degrees C via catalytic pyrolysis (1% of Z-N 
      catalyst) and at 650 and 730 degrees C via only-thermal pyrolysis. These experiments have 
      been conducted in a lab-scale, fluidized quartz-bed reactor of a capacity of 
      1-3kg/h at Hamburg University. The results revealed a strong influence of 
      temperature and presence of catalyst on the product distribution. The ratios of 
      gas/liquid/solid mass fractions via thermal pyrolysis were: 36.9/48.4/15.7%wt. 
      and 42.4/44.7/13.9%wt. at 650 and 730 degrees C while via catalytic pyrolysis were: 
      6.5/89.0/4.5%wt. and 54.3/41.9/3.8%wt. at 500 and 650 degrees C, respectively. At 650 degrees C 
      the monomer generation increased by 55% up to 23.6%wt. of total pyrolysis 
      products distribution while the catalyst was added. Obtained yields of olefins 
      were compared with the naphtha steam cracking process and other potentially 
      attractive processes for feedstock generation. The concept of closed cycle 
      material flow for polyolefins has been discussed, showing the potential benefits 
      of feedstock recycling in a plastic waste management.
CI  - Copyright (c) 2011 Elsevier Ltd. All rights reserved.
FAU - Donaj, Pawel J
AU  - Donaj PJ
AD  - Royal Institute of Technology, School of Industrial Engineering and Management, 
      Division of Energy and Furnace Technology, Brinellvagen 23, 100-44 Stockholm, 
      Sweden. pawel@mse.kth.se
FAU - Kaminsky, W
AU  - Kaminsky W
FAU - Buzeto, F
AU  - Buzeto F
FAU - Yang, W
AU  - Yang W
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20111116
PL  - United States
TA  - Waste Manag
JT  - Waste management (New York, N.Y.)
JID - 9884362
RN  - 0 (Gases)
RN  - 0 (Plastics)
RN  - 0 (Polyenes)
RN  - 0 (Polypropylenes)
RN  - 83136-87-2 (PL 732)
RN  - 9002-88-4 (Polyethylene)
SB  - IM
MH  - Catalysis
MH  - Gases
MH  - Hot Temperature
MH  - *Organic Chemistry Phenomena
MH  - Plastics
MH  - Polyenes/*chemistry
MH  - Polyethylene/chemistry
MH  - Polypropylenes/chemistry
MH  - Recycling
MH  - Refuse Disposal/*methods
MH  - Waste Management/methods
EDAT- 2011/11/19 06:00
MHDA- 2012/08/21 06:00
CRDT- 2011/11/19 06:00
PHST- 2011/05/02 00:00 [received]
PHST- 2011/09/09 00:00 [revised]
PHST- 2011/10/04 00:00 [accepted]
PHST- 2011/11/19 06:00 [entrez]
PHST- 2011/11/19 06:00 [pubmed]
PHST- 2012/08/21 06:00 [medline]
AID - S0956-053X(11)00468-5 [pii]
AID - 10.1016/j.wasman.2011.10.009 [doi]
PST - ppublish
SO  - Waste Manag. 2012 May;32(5):840-6. doi: 10.1016/j.wasman.2011.10.009. Epub 2011 
      Nov 16.