首个百千瓦级油气伴生废水制氢系统投运

Core Viewpoint - The collaboration between China National Petroleum Corporation (CNPC) and Changqing Oilfield has led to the development of China's first 100 kW oil and gas associated wastewater electrolysis hydrogen production system, which has achieved stable operation in the Sulige gas field [1] Group 1: Technology and Innovation - The system features a unique dual-structure electrolyzer design that operates under both atmospheric and pressurized conditions, allowing for direct treatment of high-concentration wastewater while simultaneously degrading pollutants and producing hydrogen [1] - The pressurized electrolyzer processes purified brine for large-scale, high-purity hydrogen production, overcoming technical challenges related to material deactivation in high-salinity and high-pollution environments [1] Group 2: Operational Performance - During the demonstration period, the system processed a total of 24 tons of wastewater, including fracturing flowback and produced water, achieving a maximum hydrogen production rate of 40 standard cubic meters per hour with a hydrogen purity of 99.99% [1] - The chemical oxygen demand (COD) removal rate from the wastewater reached 99%, indicating effective pollution treatment [1] Group 3: Economic Impact - The system's levelized cost of hydrogen production is approximately 25% lower compared to traditional methods that involve separate wastewater treatment and hydrogen production, assuming a green electricity cost of 0.2 yuan per kilowatt-hour [1]