Environmental Potential of Using Coal-Processing Waste as the Primary and Secondary Fuel for Energy Providers

Galina Nyashina, Jean Claude Legros and Pavel Strizhak
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Galina Nyashina: Department of Power Engineering National Research, Tomsk Polytechnic University, Tomsk 634050, Russia
Jean Claude Legros: Department of Power Engineering National Research, Tomsk Polytechnic University, Tomsk 634050, Russia
Pavel Strizhak: Department of Power Engineering National Research, Tomsk Polytechnic University, Tomsk 634050, Russia

Energies, 2017, vol. 10, issue 3, 1-11

Abstract: The main anthropogenic emissions (CO, CO 2 , NO x , SO x ) produced by the processing (combustion) of wastes (coal filter cakes) were measured directly for the first time. The research considered the most widespread coal filter cakes: those of nonbaking, low-caking, coking, flame, and gas coals. These filter cakes are regarded as promising components for the technologies of coal-water slurry (CWS) and coal-water slurry containing petrochemicals (CWSP). According to our estimates, the annual increment of such wastes in the world is as high as 100 million tons. Consequently, the effective utilization of these wastes in the power industry is of high interest. The evaluation of hazardous emissions from the combustion of such wastes shows that filter cakes produce a similar amount of CO and CO 2 as the initially-used coals but filter cakes are more cost-effective. We have established that CWS and CWSP technologies can be used to reduce NO x and SO x emissions. To reduce CO and CO 2 emissions when burning filter cakes, we need to switch to low-temperature combustion. Lowering the combustion temperature of filter cakes from 850 °C down to 650 °C decreases the underburning insignificantly while decreasing CO and CO 2 emissions by 30–40%.

Keywords: coal processing wastes; coal-water slurry containing petrochemicals (CWSP); greenhouse gases; hazardous emissions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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