Analysis and Prediction of Corrosion of Refractory Materials by Potassium during Biomass Combustion-Thermodynamic Study

National Engineering Laboratory for Biomass Power Generation Equipment, School of the Renewable Energy, North China Electric Power University, Beijing 102206, China

Department of Mechanical and Material Engineering, Queen’s University, Kingston, ON K7L 3N6, Canada

State Grid Energy Conservation Services CO., Ltd., Beijing 100056, China

Author to whom correspondence should be addressed.

Materials 2018, 11(12), 2584; https://doi.org/10.3390/ma11122584

Received: 9 November 2018 / Revised: 4 December 2018 / Accepted: 15 December 2018 / Published: 18 December 2018

(This article belongs to the Section Corrosion)

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Abstract

As a kind of renewable resource, biomass has been used more and more widely, but the potassium contained in biomass can cause corrosion of the refractory. For a better understanding of corrosion thermodynamic mechanisms, the five components of common refractory materials (magnesium chrome spinel MgO·Cr₂O₃, magnesium aluminum spinel MgO·Al₂O₃, Al₂O₃, MgO, and Cr₂O₃) with potassium salts (K₂CO₃, K₂SO₄, and KCl) under high-temperature were studied by using the FactSage^TM 7.0 software. Thermodynamic calculation results indicate that MgO is the best corrosion resistance of the five components of refractory materials. Based on the obtained results, the corrosion experiments in the laboratory were carried out (muffle furnace or high-temperature tube furnace) for corrosion reaction of KCl and MgO. The chemical compositions of the corroded samples were analyzed by X-ray diffraction (XRD). Under laboratory conditions (600–1200 °C), no corrosion products have been observed in the high-temperature corrosion experiments. The result indicates that to prevent the corrosion processes, refractories should contain as much MgO as possible. View Full-Text

Keywords: corrosion; refractory material; thermodynamic; potassium salt

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MDPI and ACS Style

Zhao, Y.; Cheng, G.; Long, F.; Liu, L.; Dong, C.; Wang, X.; Zhao, J. Analysis and Prediction of Corrosion of Refractory Materials by Potassium during Biomass Combustion-Thermodynamic Study. Materials 2018, 11, 2584. https://doi.org/10.3390/ma11122584

AMA Style

Zhao Y, Cheng G, Long F, Liu L, Dong C, Wang X, Zhao J. Analysis and Prediction of Corrosion of Refractory Materials by Potassium during Biomass Combustion-Thermodynamic Study. Materials. 2018; 11(12):2584. https://doi.org/10.3390/ma11122584

Chicago/Turabian Style

Zhao, Ying, Guishi Cheng, Fei Long, Lu Liu, Changqing Dong, Xiaoqiang Wang, and Jin Zhao. 2018. "Analysis and Prediction of Corrosion of Refractory Materials by Potassium during Biomass Combustion-Thermodynamic Study" Materials 11, no. 12: 2584. https://doi.org/10.3390/ma11122584

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Analysis and Prediction of Corrosion of Refractory Materials by Potassium during Biomass Combustion-Thermodynamic Study

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