Details

Autor(en) / Beteiligte

• Poonawala, Taha Y.
• Shah, Parth D.
• Channiwala, Salim A.
• Chandna, Pankaj
• Sachdeva, Gulshan
• Mongia, Hukam C.
• Gupta, Ashwani K.

Titel

Potential Use of Low-Rank High-Ash Indian Coals Through Gasification Route

Ist Teil von

• Advances in IC Engines and Combustion Technology, p.315-324

Ort / Verlag

Singapore: Springer Singapore

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Higher ash content in solid fuels poses difficulties in ash handling processes and leads to degradation of equipment efficiency due to low carbon content. The potential of low-rank energy carriers when gasified can be predicted using a thermodynamic model in terms of the upper limit of syngas composition and the process efficiency. A combined two-phase thermodynamic model has been developed incorporating both homogeneous and heterogeneous reactions, assuming it to depict the gasification process on macro-scale. Five typical Indian high-ash coal samples have been selected whose ash content varies from 43.40% to 56.53% on % wt. dry basis. The developed model is then used on these coal samples to predict its gas composition, calorific value of syngas and the optimum operating equivalence ratio. The effect of moisture content and enriched air is also presented. The cold gas efficiency with air varies from 71.3 to 76.3%, whereas it ranges from 78.63 to 84.2% when gasified with 100% O2. Such high efficiency values show that gasification can be an alternative to exploit the energy content of low-rank coals. A clever investigation of the process thermodynamics would be a first attempt in this direction.