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dc.contributor.authorMaree, Zelma
dc.contributor.authorStrydom, Christien A.
dc.contributor.authorBunt, John R.
dc.date.accessioned2020-07-02T08:30:36Z
dc.date.available2020-07-02T08:30:36Z
dc.date.issued2020
dc.identifier.citationMaree, Z. et al. 2020. Chemical and physical characterization of spent coffee ground biochar treated by a wet oxidation method for the production of a coke substitute. Waste management, 113:422-429. [https://doi.org/10.1016/j.wasman.2020.06.025]en_US
dc.identifier.issn0956-053X
dc.identifier.urihttp://hdl.handle.net/10394/35011
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0956053X20303354
dc.identifier.urihttps://doi.org/10.1016/j.wasman.2020.06.025
dc.description.abstractCoke production relies on the availability, cost and quality of coking coal. Depleting coking coal resources and environmental pressure force the metallurgical industry to search for alternative methods to produce coke. Waste spent coffee grounds (biomass) treated via hydrothermal liquefaction (HTL) is an energy-efficient method to produce biochar. In this study the use of HTL biochar as feedstock for the production of a coke substitute was investigated. Wet oxidation treatment of the prepared biochar samples was done with different wet oxidant hydrogen peroxide concentrations (5, 15, 30%). The biochar was treated for different time durations (0.5, 1, 2, 6 and 24 h) and at different temperatures (room temperature and 80 °C). Thereafter, the various samples were characterized and pyrolysed to obtain a coke substitute. Characterization of the various samples before and after thermal treatment was done using Fourier-transform infrared spectroscopy (FTIR), free swelling index, ultimate and proximate analysis, gross calorific value and compressive strength determination. The investigated characteristics of the produced coke substitute obtained from the pyrolysed biochar treated for 24 h with 30 vol% H2O2 at room temperature, showed the most promising results when compared to blast furnace cokeen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectSpent coffee groundsen_US
dc.subjectBiocharen_US
dc.subjectWet oxidationen_US
dc.subjectCoke productionen_US
dc.subjectBiomassen_US
dc.subjectHydrothermal liquefactionen_US
dc.titleChemical and physical characterization of spent coffee ground biochar treated by a wet oxidation method for the production of a coke substituteen_US
dc.typeArticleen_US
dc.contributor.researchID20682972 - Strydom, Christiena Adriana
dc.contributor.researchID20164200 - Bunt, John Reginald
dc.contributor.researchID25068318 - Maree, Zelma


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