Research on integrated process of large-scale non-grid-connected wind power and coal-to-ethylene glycol

The contribution rate of wind power on the grid is difficult to beyond 10%. The wind-powered generator increases the complexity and the manufacturing costs for meeting the requirements of power grid, which limits the applications of large-scale wind power. The coal-to-ethylene-glycol (EG) process is an important technology route for decreasing oil-importing, but release a large number of CO₂. Integrated process of large-scale non-grid-connected wind power and coal-to-EG "grafts" the wind power on the traditional coal chemical industry to avoid the bottleneck issue of wind power. We found the integrated process can reduce manufacturing costs of wind farms and reduce the CO₂ emissions, and at the same time increase output of ethylene glycol if using smaller air separation unit and CO conversion devices. The integrated process will greatly make ldquogreenrdquo coal chemical industry possible and achieve optimization of efficiency, economic and environmental benefits, as well as provide new practical technologies of energy-saving and consumption-reducing to substitute oil strategy for China.