The corn stalks on the black soil in Northeast China have just completed a new round of autumn harvest preparations, and the construction site of the Pear Tree Green Methanol Project is synchronously advancing pile foundation operations. This new industrial chain that connects wind power, straw, and ocean shipping is gradually transforming from a blueprint to a reality in Siping, Jilin.

Dual route coupling reconstruction process for alcohol production

The project is equipped with 400000 kilowatts of wind power, with an annual utilization hours of 2860 hours, and a hydrogen production capacity of 32000 standard units per hour through electrolysis of water. The hydrogen production unit does not pursue rigid and stable operation, and is completely dynamically adjusted with wind power. It produces hydrogen at full capacity when the wind is strong, reduces load when the wind is weak, and maximizes the digestion of local green electricity.

The biomass gasification line consumes local corn stalks on site, converts agricultural waste into crude synthesis gas, and then purifies and removes hydrogen sulfide and carbon dioxide to obtain clean coal gas mainly composed of carbon monoxide and hydrogen. The latest on-site data in September shows that 65% of the foundation pouring for the first batch of biomass gasifiers has been completed, and the first batch of machine position survey work for the wind power project has been completed, with the overall progress one week ahead of schedule.

The closed-loop system of the entire chain connects the decarbonization path of shipping

The hydrogen produced by electrolyzing water is divided into two streams for mixing, and one stream is mixed with biomass clean gas to accurately control the carbon hydrogen ratio and send it to the No.1 methanol synthesis unit. The other hydrogen gas is mixed with the carbon dioxide recovered from the gasification and purification process, and sent to the second methanol synthesis unit to directly consume the carbon that was originally intended to be emitted, filling the gap of insufficient hydrogen content in biomass raw materials. Keywords: green methanol project, hydrogen production by electrolysis of water

This route does not require an air separation unit and eliminates the need for a carbon monoxide shift unit. The process is shorter than traditional coal to methanol and does not directly emit carbon dioxide. After the project is completed, it will consume about 700000 tons of corn stover annually, produce 197200 tons of green methanol, replace nearly 100000 tons of marine fuel, and reduce carbon dioxide emissions by over 300000 tons. China COSCO Shipping and Shanghai SIPG Group have been deeply involved since the investment stage, directly targeting downstream application scenarios and forming a complete closed loop from raw materials to refueling and then to ocean shipping. The project with a total investment of 4.92 billion yuan is planned to be fully completed by the end of 2027.Editor/Cheng Liting