Comparative Analysis of Syngas Composition from Different Feedstocks

The composition of syngas varies significantly with the type of feedstock used in the gasification or reforming process. Each feedstock possesses a unique elemental composition, moisture content, ash percentage, volatile matter, and calorific value, all of which influence the concentrations of hydrogen, carbon monoxide, methane, carbon dioxide, and trace gases in the final syngas.

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Coal-Derived Syngas

Coal remains one of the most widely used feedstocks for large-scale syngas production due to its abundant availability and high carbon content. During gasification, coal typically produces syngas containing relatively high concentrations of carbon monoxide because of its elevated fixed-carbon content. Depending on the gasifier design and operating conditions, hydrogen concentrations generally range between 25% and 40%, while carbon monoxide concentrations may exceed 40%.

Coal-derived syngas often contains sulfur compounds such as hydrogen sulfide and carbonyl sulfide, requiring extensive gas-cleaning operations before downstream utilization. In addition, the presence of ash and trace metals necessitates efficient particulate removal systems to protect catalysts and process equipment.

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