Functional Group Characteristics and Pyrolysis/Combustion Performance of Karamay OS Based on FT-IR and TG–DTG Analyses

Abstract

Proximate analysis, ultimate analysis, Fourier-transform infrared spectroscopy (FT-IR), and thermogravimetry−differential thermal analysis characterization were carried out on oily sludge (OS) samples OS1−OS5, from Karamay, Xinjiang, China. The Coast− Redfern model (CRm) was used to simulate the pyrolysis and combustion kinetics of oily samples. The results showed that the peak area percentage of benzene ring trisubstitution of OS5, in the range of 700−900 cm −1 , is close to 75%, corresponding to its high volatile content. Based on the kinetic analysis by the CRm, it is found that the fitting degree of the five samples is better when the reaction order is selected as n = 2, with R 2 close to 1.00 and 2RT/E to 0. Among them, the S N and D W of OS5 are 17.8 × 10 −10 % 2 min −2 °C−3 and 0.10899 × 10 −5 % min −1 °C−2 , respectively, higher than those of other samples, indicating a good combustion performance.

Analysis of Pyrolysis Performance and Molecular Structure of Five Kinds of Low-Rank Coals in Xinjiang Based on the TG-DTG Method

“…More researchers have used it. 26−28 Mo et al 29 studied the combustion performance for five kinds of oily sludge in Karamay by Fourier transform infrared (FTIR) and thermogravimetry-differential thermal analysis (TG-DTG) analyses, and found that the combustion performance was related to the volatile content. However, many studies 30−32 on pyrolysis/combustion characteristics focused on the combustion part, but there are a few studies on the calculation of the pyrolysis index.…”

“…The Coats–Redfern model (CRm) is a commonly used approximation formula, and it is one of the well-known approximate formulas according to previous studies. , Although its accuracy needs to be improved, CRm is simple to linearize the kinetic equation. More researchers have used it. − Mo et al studied the combustion performance for five kinds of oily sludge in Karamay by Fourier transform infrared (FTIR) and thermogravimetry-differential thermal analysis (TG-DTG) analyses, and found that the combustion performance was related to the volatile content. However, many studies − on pyrolysis/combustion characteristics focused on the combustion part, but there are a few studies on the calculation of the pyrolysis index.…”