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“Green” integrated system: Non-grid-connected wind power and coal-to-methanol

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4 Author(s)
Weidou Ni ; Tsinghua-BP Clean Energy Res. & Educ. Centre, Beijing, China ; Zhen Chen ; Weidong Gu ; Zhuoyong Yan

Wind energy is a mature technology that has promising future in development and utilization of renewable energy sources, but the contribution rate of wind power on the grid is difficult to reach beyond 10% due to the high randomicity of wind. Coal-to-methanol process as the representative of the modern coal chemical industry is the important strategic alternatives of petrochemical product in application, but it will emit a considerable amount of carbon dioxide in the production process. A new integrated system which combines coal-to-methanol with wind power is proposed in this paper. In this system, wind power is used to electrolyze water for producing H2 and O2. The O2 is fed to the gasifier as gasification agent. The H2 is mixed with the CO-rich gas to adjust the H2/CO to an appropriate ratio for methanol synthesis. In comparison with conventional coal-to-methanol system, the proposed system omits the expensive and energy-consuming Air-Separation-Unit (ASU) and greatly reduces the water gas shift process, which brings both advantages in the utilization of all raw materials and significant reduction of CO2 emission. This system will be attractive in the regions of China with abundant wind and coal resources.

Published in:

World Non-Grid-Connected Wind Power and Energy Conference, 2009. WNWEC 2009

Date of Conference:

24-26 Sept. 2009