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Effects of catalysts on combustion reactivity of anthracite and coal char with low combustibility at low/high heating rate

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Abstract

The effects of CaO, Fe2O3, and MnO2 on the combustion reactivity of anthracite and coal char with low combustibility were investigated using thermogravimetric analysis (TG) and a drop tube furnace (DTF) under an oxygen-rich atmosphere. TG results showed that catalysts exhibited different effects on the combustion characteristics of fuels. For ignition temperature, it was found that, with increasing addition, the ignition temperature first decreased and then increased. For combustion rate, the positive effect of the catalyst on combustion rate was significantly enhanced with the increasing amount of additive. For burnout behaviour, at an equal additive dose, the effects of the three catalysts on burnout behaviour of two fuels varied greatly. The DTF results showed that the combustion reactivity of coal char was improved even more than that of anthracite. Eventually, the effects of three factors, including properties of the catalysts, fuel properties, and combustion conditions, on the catalytic combustion, were discussed.

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Acknowledgements

The authors thank The Natural Science Foundation Project of China (Nos. 51374166 and 51574189), The Natural Science Foundation research project, Shanxi, China (No. 2016JQ5041), and The Initial Foundation Project of Xi’an University of Architecture and Technology (No. DB04146) for funding this research.

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  1. School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710311, China

    Chong Zou, Junxue Zhao, Xiaoming Li & Ruimeng Shi

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  1. Chong Zou
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  2. Junxue Zhao
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  4. Ruimeng Shi
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Correspondence to Chong Zou.

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Zou, C., Zhao, J., Li, X. et al. Effects of catalysts on combustion reactivity of anthracite and coal char with low combustibility at low/high heating rate. J Therm Anal Calorim 126, 1469–1480 (2016). https://doi.org/10.1007/s10973-016-5806-y

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  • DOI: https://doi.org/10.1007/s10973-016-5806-y

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