RESEARCH PROGRESS OF NATURAL GAS FOLLOW-UP HYDROGEN MIXING TECHNOLOGY

Hydrogen is a secondary energy with zero emission, one of the most important energy sources to achieve the goal of “double carbon”. Using in-service natural gas pipeline or network to transport hydrogen blended to natural gas is an effective way to realize large scale transport of hydrogen. It is important to accurately control the proportion of hydrogen in the natural gas pipelines transport system. The structure and principle of electric type and mechanical type with following up hydrogen blended to natural gas system are introduced. The concentration sensors of mechanism and application with infrared absorption type, heat conduction type, semiconductor type are introduced. Then, their comprehensive measurement system in dynamic adjustment and measurement of hydrogen blended to natural gas ratio are analyzed. Three important in-service hydrogen blended to natural gas demonstration projects are introduced from the composition and operation results. Based on the engineering practice experience, the development trend of hydrogen blending to natural gas technology is projected.