KUALA LUMPUR: TNB Power Generation Sdn Bhd (TNB Genco), a wholly-owned subsidiary of Tenaga Nasional Bhd (TNB), has signed a tripartite memorandum of understanding (MOU) with Japan-based IHI Corporation and Petroliam Nasional Bhd’s (Petronas) gas and new energy division for a feasibility study on the low carbon hydrogen and low carbon ammonia supply chain in Malaysia.