Review on thermal conversion characteristics of coal in O2/H2O atmosphere

O-2/H2O combustion is regarded as a new generation of Oxy-fuel combustion technology, which is expected to be applied in coal-fired power plants to achieve carbon capture. However, the research on O-2/H2O combustion technology is still at the laboratory stage, some fundamental issues need to be addressed before industrial demonstration, especially in the areas of high O-2 and H2O concentration. Based on the relevant experimental and simulation studies, this paper systematically reviews the O-2/H2O combustion of pulverized coal. Firstly, the economy and efficiency of the O-2/H(2)Ocombustion power generation system are introduced, indicating that the O-2/H2O combustion technology is feasible. And H2O will make the thermochemical conversion process in O-2/H2O combustion to produce new phenomena and problems for its different physical and chemical properties from CO2 and N-2. Secondly, we discussed the thermal conversion characteristics of pulverized coal in O-2/H2O atmosphere, including pulverized coal ignition, volatile combustion, thermochemical reaction of char, and the conversion of N. Finally, based on the review and summary, we put forward future research needs.

Automated summary

This paper systematically reviews the research status and key issues of O-2/H2O combustion technology, introduces its application in pulverized coal combustion, and proposes future research directions.