Experimental study of co-pyrolysis of polyethylene/sawdust mixtures

Abstract

A study of the behavior of the thermal decomposition of mixtures of biomass and thermoplastics, such as polyethylene, is of interest for processes for the thermal recovery of industrial and urban wastes such as pyrolysis or gasification. No solid residue is formed during the thermal degradation of pure polyethylene. However, the addition of biomass, which generates char can vary the product distribution and increase the heating value of the gas obtained. A study of the thermal degradation of pine sawdust, polyethylene and mixtures of polyethylene and pine sawdust has been carried out in a fluidized bed reactor. Experiments were carried out at five different temperatures: 640, 685, 730, 780, and 850 ?C. The yields and composition of the derived oil, wax, and gas were determined. The addition of polyethylene increases the gas production and decreases the production of waxes and liquids for the different temperatures tested. The main gases produced from the co-pyrolysis process were, at low temperatures, carbon monoxide ethylene, carbon dioxide, propylene, butadiene, methane and pentadiene while at high temperatures the gas composition changed drastically, the main components being carbon monoxide (more than 33 wt.%), ethylene, methane benzene and hydrogen. The analysis of the liquid fraction shows a decrease of the concentration of oxygenated and aliphatic compounds.

Synergetic pyrolysis of high density polyethylene and Jatropha and Karanj cakes: A thermogravimetric study

“…Thus, enhanced rate of mass loss of biomass, reduced residue formation, and earlier degradation of HDPE bespeak for the synergistic effect of copyrolysis of HDPE biomass. Berrueco et al 24 reported the change in product distribution along with the enhancement in heating value of gas obtained by addition of pine sawdust in PE in a fluidized bed reactor. Similar studies for HDPE-JC and HDPE-KP are in progress.…”

Optimization of fuel recovery through the stepwise co-pyrolysis of palm shell and scrap tire

“…In addition, Cornelissen et al [13] reported the reduction of water content in pyrolysis oil produced via the flash co-pyrolysis of biomass with polylactic acid. Berrueco et al [14] studied the co-pyrolysis of high density polyethylene mixed with sawdust in a fluidized bed reactor. The authors found a decrease in the concentration of oxygenated and aliphatic compounds in liquid fraction.…”

Silicon‐containing fluorenylacetylene resins with low curing temperature and high thermal stability

“…The relative contents of phenyl ring volatile and its derivatives for DEF are up to 42.28%, which could be from the pyrolysis of fluorenyl rings (as shown in Scheme ) due to instability of C 9 on fluorenyl ring, and a little bit cyclotrimerization [Scheme (a)]. Also identified products contained a few of naphthyl rings and their derivatives which were formed by Diels–Alder reaction [Scheme (b)]. Besides, a lot of phenanthryl ring volatiles and their derivatives were found in the pyrolysis products of DEF which could be produced by the reaction between fluorenyl rings and alkynyl units [Scheme (c)] .…”