Industrial application prospect and key issues of pure hydrogen reduction process

In order to promote the development of pure hydrogen reduction process, the industrial application prospect and key issues in basic theory and application are discussed by the methods of theoretical analysis and calculation. Through the discussion of thermodynamics and kinetics of pure hydrogen reduction reaction, it can be concluded that the reduction reaction of iron oxide by pure hydrogen is an endothermic reaction, and the reaction rate of hydrogen reduction is significantly faster than that of carbon reduction. To explore the feasibility in the industrial applications of pure hydrogen reduction, hydrogen reduction reactor and process are designed with refer to the industrialized hydrogen-rich reduction process, and the methods of appropriately increasing the reduction temperature, pressure and the temperature of iron ore into the furnace are put forward, which will accelerate the reaction rate and promote the reduction of iron oxide. The key technical parameters in engineering application, such as hydrogen consumption, volume of circulating gas and heat balance, are discussed by theoretical calculation, and the optimized parameter values are proposed. The process parameters, cost, advantages and disadvantages of various current hydrogen production methods are compared, and hydrogen production by natural gas reforming has a good development prospect. Hydrogen production from electrolytic water is a research hotspot at present, but it does not have the conditions for large-scale industrial application and still needs to be further developed. Through the discussion of corrosion mechanism of high temperature and high-pressure hydrogen on heat-resistant steel materials and the corrosion mechanism of H₂S in hydrogen on steel, the technical ideas of developing new metal temperature resistant materials, metal coating materials and controlling gas composition are put forward, which provides guidance for the selection of heater and reactor materials. Finally, the key factors affecting smooth operation of hydrogen reduction process in engineering application are analyzed, which provides a reference for the industrial application of pure hydrogen reduction process.