Xin Lang Cai Jing·2025-12-03 13:21Core Viewpoint - The successful operation of China's first 100 kW oil and gas associated wastewater hydrogen production system marks a significant breakthrough in the resource utilization of oil and gas wastewater, addressing key industry challenges [1][7]. Group 1: System Overview - The system, developed by China National Petroleum Corporation (CNPC) Shenzhen New Energy Research Institute and Changqing Oilfield, operates continuously and stably in the Sulige gas field [1][7]. - It features a unique dual-configuration electrolyzer design that processes high-concentration wastewater directly in a normal-pressure cell while degrading pollutants and producing hydrogen simultaneously [1][7]. - The pressurized cell is used for large-scale, high-purity hydrogen production from purified saline water [1][7]. Group 2: Performance Metrics - During the demonstration period, the system treated a total of 24 tons of wastewater, achieving a maximum hydrogen production rate of 40 standard cubic meters per hour [1][7]. - The hydrogen purity reached 99.99%, and the chemical oxygen demand (COD) removal rate of the wastewater was as high as 99% [1][7]. Group 3: Economic Impact - Under the condition of green electricity costing 0.2 yuan per kilowatt-hour, the levelized cost of hydrogen production is approximately 25% lower compared to the traditional method of "treating wastewater first, then producing hydrogen separately" [2][7].