Efficient Utilization of CO2 in a Coal to Ethylene Glycol Process Integrated with Dry/Steam-Mixed Reforming: Conceptual Design and Technoeconomic Analysis

In the momentum of reducing the CO2 emission of coal to ethylene glycol (CtEG) process, a novel carbon dioxide utilized coal to ethylene glycol (CUCtEG) process is proposed, simulated, and optimized to find the optimal way for simultaneous reduction and utilization of CO2 emissions of conventional coal to ethylene glycol process. The novel process is integrated with coke oven gas and dry/steam-mixed methane reforming technologies to enhance resource and energy efficiencies as well as reduce CO2 emission. On the basis of the rigorous steady-state simulation of the process, the key operational parameters of the proposed process are investigated and optimized. A detailed technoeconomic analysis is conducted to manifest the advantages of the proposed process by comparison with a conventional process. The results show that the optimal feed ratio of coke oven gas to coal is 0.68, and the split ratio of CH4 for steam methane reforming reaction is suggested to be 0.74. Compared with the conventional coal to ethyl...