Intermediate pyrolysis of organic fraction of municipal solid waste and rheological study of the pyrolysis oil for potential use as bio-bitumen

Abstract

This work presents a study on intermediate pyrolysis of the organic fraction of municipal solid waste (OFMSW) and characterisation of organic liquid product (pyrolysis oils) with particular focus on aging and rheological characteristics. The feedstock was a real municipal waste sample received from a local waste treatment plant. Shredded into small particles, it contained a high amount of moisture (51.2%) and ash (17.4%). A pilot-scale intermediate pyrolysis system was used to process the material. The process mass balance showed that the yield pyrolysis oil was 10.6%. GC-MS and FTIR experiments showed that the accelerated aging (80°C for 24h) did not cause an obvious change in the liquid chemical composition, but led to a significant reduction in the solids and moisture contents. The dynamic viscosity tests demonstrated that the intermediate pyrolysis oil derived from OFMSW is a non-Newtonian fluid. The dynamic viscosity of the pyrolysis oil reduced with the increase of temperature or shear rate, which can be modelled by WLF function and the Carreau model, respectively. A shear rate-temperature superposition method was proposed to construct the viscosity master curve at a wide range of shear rate, where WLF function was employed to model the shear rate-temperature shift factor. The accelerated aging caused an obvious reduction in dynamic viscosity, resulting from the decomposition of the semisolid organic agglomerates in the solids content during the aging of the OFMSW intermediate pyrolysis oil. The relatively high viscosity and reduced viscosity after aging of the OFMSW pyrolysis oil has indicated its potential for application as a substitute of the light fraction in the bitumen for road construction.

Molecular dynamics investigation of interfacial adhesion between oxidised bitumen and mineral surfaces

“…Recently, the aging effects of bitumen on the rheology [10,11], intrinsic healing [12], and surface energy and bonding property [13] were also evaluated using a variety of material characterisation technologies including Dynamic Shear Rheometer (DSR), Fourier Transform Infrared Spectroscopy (FTIR) and Atomic Force Microscopy (AFM) tests. It has been recognised that the oxidation causes the hardening of the bitumen, leading to a higher cracking susceptibility of the asphalt pavements [14].…”

A techno-economic analysis of energy recovery from organic fraction of municipal solid waste (MSW) by an integrated intermediate pyrolysis and combined heat and power (CHP) plant

“…In this work, a heating temperature of 500 °C and a solid residence time of 10 minutes was selected for the reactor operating conditions. The detailed process mass balance is presented in Section 2.3 and the characteristics of the liquid, solid and gaseous products can be found in the previous related works [24,25].…”

“…the characteristics of the organic fraction of MSW feedstock evaluated in this work.The methods used for the proximate and ultimate analyses are presented in the previous work[24,25].…”

Study on the Pyrolysis Kinetics and Mechanisms of the Tread Compounds of Silica-Filled Discarded Car Tires

“…For example, pyrolysis chars from coals can even be used as highly insulating building material [13]. Meanwhile, bio-bitumen can be obtained from organic fractions of municipal solid waste [14], while liquid hydrocarbon biofuels can be obtained from microalgae or waste cooking oil by catalytic pyrolysis [15,16], and the types and principles of catalysts are also of great significance for research [17,18]. Considering the value of the products of catalytic pyrolysis, carbon nanofibers obtained from the catalytic pyrolysis of acetylene have good development prospects [19,20].…”