Research status and development trend of ultra-low ash coal preparation technology

ABSTRACT

Coal is the main source of energy in our country, and its role in the economic development is extremely important. However, with the development of economy, the dependence on coal is becoming stronger and stronger. As coal is a nonrenewable resource and caters to the sustainable development policy, the use of coal with low ash, low sulfur and high value is a major trend of coal development in the future. Finally, based on the advantages and disadvantages of the aforementioned preparation technology, the future development direction for Ultra-low ash coal preparation is proposed. This review provides insights for the clean utilization and high-value utilization of coal.

KEYWORDS:

• Ultra-low ash coal
• clean utilization
• chemical method
• extraction method
• special auxiliary method

Acknowledgment

The authors acknowledge the financial support by the National Natural Science Foundation of China (No. 52304285), the research fund of Henan Key Laboratory of Coal Green Conversion (Henan Polytechnic University) (CGCF202203), the Fundamental Research Funds for the Universities of Henan Province (NSFRF220428, NSFRF240405), the Outstanding Youth Fund of Henan Polytechnic University (J2024-3), and the Key Scientifc and Technological Project of Henan Province (232102231028).

Disclosure Statement

No potential conflict of interest was reported by the author(s).