High-Temperature Online Reforming of Converter Gas with Coke Oven Gas

Abstract

A large amount of by-product gas containing abundant physical heat and excessive quantity of carbon dioxide (CO2) is generated during the iron and steel production. Through the high-temperature online reforming of the by-product gas with coke oven gas, generated physical heat and CO2 can be completely utilized to achieve efficient use of energy and reduction of CO2 emission, respectively, and high-quality chemical synthesis gas can be acquired simultaneously. The thermodynamic behavior of the reforming of converter gas with coke oven gas was analyzed based on Gibbs energy minimization method. The thermodynamic calculation model was proposed and utilized to describe the effect of temperature, pressure, and ratio of converter gas to coke oven gas on conversion rate of CO2 and methane (CH4) and ratio of H2 to CO of the product gas. High temperature and low pressure were found to be the favorable thermodynamic condition for reforming process. Ratio of H2 to CO of product gas was significantly influenced by initial composition of reactant gases. Moreover, the reforming reaction was investigated by performing the mixed reforming experiments under the condition of high temperature to provide theoretical and experimental basis for the realization of industrialization.