Decarbonising Vietnam's power and industry sectors by carbon capture and storage

In this paper, opportunities to use carbon capture and storage (CCS) to decarbonize Vietnam's power and industry sectors are investigated. Results indicate that Vietnam's power and industry sectors emit 136 Mtpa and 88 Mtpa CO2, respectively. The mid-CO2 storage capacity in nearby sedimentary basins is 186 Gt, enough to store 831 years of CO2 emission. Of this, 182 Gt (98.2%) comes from saline aquifers, 2.8 Gt (1.5%) from gas fields, and only 0.5 Gt (0.3%) from oil fields. Furthermore, CO2 injection has the potential to recover 1058 MMbbl from oil fields and 95 MMbbl from gas fields through CO2 enhanced oil recovery (EOR) and enhanced gas recovery (EGR), respectively. CCS hubs can be used to store CO2 captured from numerous nearby sources before it is transported to a common sink, thus lowering the project's overall cost through economies of scale. Based on a CO2 source-sink mapping exercise, this study proposes establishing four CCS hubs to connect regional CO2 sources and sinks. Implementation of CCS projects based on these hubs can remove up to 142 Mtpa CO2 or 64% of stationary emission of Vietnam with a CO2 source-sink distance of around 100 km, thereby significantly contributing to Vietnam's decarbonization goal.