A TG-IR study on the co-pyrolysis characteristics of oily sludge and crops
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ORIGINAL ARTICLE
A TG-IR study on the co-pyrolysis characteristics of oily sludge and crops Hui Rong 1 & Jiangru Yuan 2 & Yinqi Feng 3 & Yufeng Yi 4 & Zheng Chang 1 Received: 6 June 2020 / Revised: 13 August 2020 / Accepted: 18 August 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The co-pyrolysis characteristics of oily sludge (OS), wheat straw (WS), peanut straw(PS), and coconut shell (CS) have been studied experimentally with the thermogravimetric infrared analyzer, and the precipitation characteristics of the main reaction products were analyzed. During the separate pyrolysis of OS, the main weight loss stage appeared in 200–500 °C and the maximum weight loss peak appeared at 460 °C; its value is 8.42%/min. For the three additives, the main weight loss stage of all the three additives appeared in 200–400 °C; the maximum weight loss peak values of WS, PS, and CS were 11.38%/min, 8.77%/min, and CS 12.03%/min, respectively. It has been found that the three additives promoted the pyrolysis reaction of OS, and the mean apparent activation energy of the reaction was significantly reduced when the content of WS was 40%, PS was 40%, and CS was 50%. WS and PS make the pyrolysis process more adequate, and the amount of residual material is reduced. The addition of three additives could reduce the production of CH4 and CO and increase the precipitation of CO2. Keywords Pyrolysis . Oily sludge . Thermogravimetric . Straw . Coconut shell
1 Introduction At present, a large part of global energy supplies is still dependent on petroleum. This not only emits a huge amount of greenhouse gases in the process of its utilization but also Highlights • WS and PS can make the pyrolysis of OS more efficient. • WS, PS, or CS can significantly reduce the activation energy of OS pyrolysis. • CH4 and CO can be reduced by adding WS, PS, and CS; however, CO2 will increase. * Zheng Chang [email protected] Hui Rong [email protected] 1
School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
2
PetroChina Exploration & Development Research Institute, Beijing 100083, China
3
Opto-Mechatronic Equipment Technology Beijing Area Major Laboratory, Beijing Institute of Petrochemical Technology, Beijing 102617, China
4
School of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
produces a significant amount of solid pollutants (oily sludge) in the process of oil extraction, oil refining, and oil storage [1]. These have caused serious environmental pollution. In recent years, processes of oily sludge (OS) pyrolysis or combustion have been analyzed using a thermogravimetric analysis method or a thermogravimetric mass spectrometry analysis method, which are widely used research methods in improving resourceful and clean using of OS [2, 3]. It has been shown in many studies that appropriate additives can play obvious promoting effects on the resourceful utilization of OS, although many of these additives are wastes that need to
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