TO SUPPORT LARGE-SCALE HYDROGEN ECONOMY AND MITIGATE CLIMATE IMPACT OF HYDROGEN EMISSIONS, DETECTION AND QUANTIFICATION OF HYDROGEN EMISSIONS HAVE BECOME INCREASINGLY IMPORTANT. HOWEVER, THERE IS NO WELL-ESTABLISHED TECHNOLOGY OR METHOD FOR HYDROGEN EMISSION QUANTIFICATION. NETL AND PARTNERS WILL DEVELOP, DEMONSTRATE, AND FIELD VALIDATE NOVEL FIBER OPTIC-BASED HYDROGEN LEAK SENSOR SYSTEMS AND ROBUST GAS QUANTIFICATION MODELS TO ACCURATELY AND EFFICIENTLY QUANTIFY HYDROGEN EMISSIONS FROM HYDROGEN PIPELINES AND VALUE CHAIN. THIS PROPOSAL LEVERAGES > 10 YEARS’ EXPERIENCE FROM THE TEAM IN PIPELINE MONITORING AND FIELD SURVEY OF GAS EMISSION QUANTIFICATION. WE PROPOSE TWO DIFFERENT HYDROGEN QUANTIFICATION SYSTEMS. THE FIRST SYSTEM UTILIZES A MOBILE LAB VEHICLE EQUIPPED WITH A SENSITIVE AND SELECTIVE HYDROGEN SENSOR AND A ROBUST POINT SOURCE GAUSSIAN MODEL MODIFIED FOR HYDROGEN (PSG-H2). THIS METHOD IS APPLICABLE FOR THE WHOLE HYDROGEN VALUE CHAIN. THE SECOND SYSTEM UTILIZES NOVEL DISTRIBUTED LINEAR SENSORS INSTALLED ON THE PIPELINE FOR LEAK-INDUCED ACOUSTIC, PRESSURE, AND HYDROGEN CONCENTRATION MONITORING AND AN AI-DRIVEN PIPELINE-SPECIFIC QUANTIFICATION METHOD CALLED H2-SMART. BOTH SYSTEMS HAVE CAPABILITIES OF IDENTIFYING LEAK LOCATIONS AND QUANTIFICATION. THE SENSOR TECHNOLOGIES ARE NOVEL FIBER OPTIC-BASED SENSORS (POINT OR DISTRIBUTED) AND HAVE ADVANTAGES OF SPECIFIC SELECTIVITY TO HYDROGEN, IMPROVED SAFETY IN FLAMMABLE GASES, KM-RANGE LONG DISTANCE COVERAGE, AND MULTIPLE FUNCTIONS. BY THE END OF THE PROJECT, THE TEAM WILL PERFORM MULTIPLE FIELD SURVEYS (CONTROLLED RELEASE AND BLIND TEST) AT HOPE GAS’S GAS TOWN (A TEST AND TRAINING FACILITY FOR HYDROGEN USE) WITHIN A 100M X 100M AREA TO VALIDATE THE QUANTIFICATION SYSTEMS (FIG. 1). THE SUCCESS OF THE PROJECT WILL PROVIDE MULTIPLE HYDROGEN QUANTIFICATION TECHNOLOGIES BASED ON NOVEL FIBER OPTIC SENSOR SYSTEMS AND ROBUST QUANTIFICATION METHODS.