PetroChina: White Hydrogen PetroChina is one of China's largest oil and gas producers and is the publicly listed arm of China National Petroleum Corporation (CNPC). Its R&D center, the Research Institute of Petroleum Exploration and Development (RIPED), conducts research across all areas of the upstream petroleum business. This profile focuses on white hydrogen development within PetroChina/RIPED. PetroChina: White Hydrogen