Thermal behavior and kinetics analysis of co-combustion of petroleum coke and paper sludge-derived hydrochar. (November 2022)

• Record Type: Journal Article
• Authors: Mao, Rui; Shao, Jiugang; Wang, Guangwei; Wang, Fei; Wang, Chuan
• Is Part Of: Waste management. Volume 153(2022)
• Page Start: 405
• Page End: 414
• Publication Date: 2022-11
• Subjects: Petroleum coke -- Paper sludge -- Hydrochar -- Blast furnace injection -- Co-combustion -- Kinetics; Hazardous wastes -- Periodicals; Refuse and refuse disposal -- Periodicals; 363.728
• DOI: 10.1016/j.wasman.2022.09.028
• Languages: English
• ISSNs: 0956-053X

Abstract

Graphical abstract: Highlights: The physical and chemical properties of PS and PC were studied systematically. The reactivity of PC combustion reaction was significantly affected by PS. PC:PS = 4:1 has the lowest combustion activation energy. The Kissinger Akahira Sunose model shows a good fitting effect. Abstract: The co-combustion reactivity and kinetics of petroleum coke (PC) and paper sludge-derived hydrochar (PS) were investigated via thermogravimetric analysis. The physical and chemical structure features were also systematically tested. The results show that the combustion process of PS could be divided into three stages, while for PC only one stage could be clarified. Due to high volatile content, developed pore structure and low carbon-order degree, the combustion reactivity of PS was higher than that of PC. Although the ignition property of the blends could be significantly improved by addition of PS, it changed little for the burnout temperature and as a result the combustion intensity was deteriorated. For the samples with addition of PS from 20 % to 80 %, the comprehensive combustion index decreased from 3.69 × 10 -15 to 2.12 × 10 -15 . The Kissinger AkahiraSunose model-free method was used in the co-combustion reaction of PC and PS, and good fitting results were obtained. For different samples with varying addition of PS, the activation energies were in the range of 107.51–198.44 kJ/mol, with the lowest value obtained at 20 % of PS, which was also the optimum proportion for co-combustion of PC and PS.