Sahu, Arti and Chavan, Prakash D. and Saha, Sujan and Singh, Rupesh Kumar and Sahu, Gajanan and Dhaigude, Nilesh D. (2026) Valorization of waste materials as catalysts for sustainable coal gasification and cleaner syngas production. Environmental Research, 305.
Full text not available from this repository.Abstract
Coal gasification is a critical technology with the potential to enhance energy efficiency, reduce greenhouse gas emissions, and optimize the utilization of coal resources. Conventional coal gasification naturally happens at extremely high temperatures exceeding 1000 °C, posing challenges related to energy consumption, degradation of gasifier materials, and operational issues such as feed material agglomeration, sintering, and high-temperature safety concerns. Catalytic gasification may be employed to facilitate gasification reactions at significantly lower temperatures of 700–800 °C, thereby reducing energy requirements, minimizing equipment wear, and mitigating operational problems. While these catalysts may enhance reaction kinetics and steer syngas production towards favourable yields, several challenges persist, particularly concerning catalyst cost, deactivation, sulfur contamination, and scalability. To overcome this issue, the use of earth-abundant, cheap, and use-and-throw catalysts can be a smart option. Current research is advancing towards throwaway catalysts, innovatively derived from waste materials and naturally occurring substances, including ore minerals, thus offering environmentally sustainable and economically viable alternatives. However, in this field, till now, a detailed review work has not been reported. The present review work encompasses the study of earth-abundant alkali and alkaline earth metals-based minerals, as well as transition metal oxides and waste-based materials like red mud, eggshell, and demolition concrete for potential catalysts for catalytic coal gasification. In this review, the potential of catalysts for catalytic gasification has been compared based on % carbon conversion, H2% in syngas, and reduction in gasification operating temperature. A detailed study revealed that alkali metal-based minerals exhibit better catalytic conversion; however, their stability is reported to be poor compared to alkaline earth metal- and heavy metal-based mineral materials. An appropriate combination of these materials has been found to show better catalytic activity as well as selectivity, as compared to individual components. This review work will help to select a suitable commercially feasible gasification catalyst based on the required gasification operating conditions that will lay the foundation for the industrial application of the catalysts in coal gasification.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Coal gasification; Waste-derived catalysts; Catalytic gasification; Syngas production; Clean coal technologies; Sustainable catalysis; Waste valorization; Circular economy |
| Subjects: | Coal Characterisation |
| Divisions: | UNSPECIFIED |
| Depositing User: | Mr. B. R. Panduranga |
| Date Deposited: | 16 Oct 2026 05:23 |
| Last Modified: | 16 Oct 2026 05:24 |
| URI: | https://cimfr.csircentral.net/id/eprint/3054 |
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