Reactivity of bio-coke with CO

• Published in: Fuel processing technology Vol. 92; no. 4; pp. 801 - 804
• Main Authors: Ng, K.W, MacPhee, J.A, Giroux, L, Todoschuk, Ted
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2011
• Subjects: alkalinity; carbon dioxide; charcoal; coal; gasification; greenhouse gas emissions; mineral content; temperature; thermogravimetry
• ISSN: 0378-3820; 1873-7188

Incorporation of biomass-derived materials in coal blends for cokemaking is one of the strategies that could reduce the levels of greenhouse gas emissions produced by the steelmaking process. Bio-coke refers to the resultant coke prepared with the addition of charcoal to a coal blend. In this work, characteristics of bio-coke gasification by reacting with CO₂ were examined using Thermal Gravimetric Analysis. Bio-coke samples with different levels of charcoal addition to a coal blend were prepared in the CanmetENERGY pilot-scale coke oven. These samples were heated in CO₂ for identification of the minimum gasification temperature. Sample gasification rates at 1000°C were also measured. It was observed that mineral content plays an important role in the gasification characteristics of the bio-cokes. Those with low mineral content behave very similarly to the reference coke. Higher mineral content bio-coke reacts with CO₂ at a lower temperature. It was found that the gasification characteristics of the bio-cokes are well described by the alkalinity index.