The steel sector is one of the largest industrial sources of CO2 emissions, contributing around 28% of the global industry sector’s direct greenhouse gas emissions. One crucial technological option for decreasing emissions is carbon capture and storage (CCS). ‘CCS readiness’ or ‘CO2 Capture Readiness (CCSR)’ is a design concept requiring minimal up-front investment in the present to maintain the potential for CCS retrofit in the future. As such, capture readiness avoids a carbon lock-in effect in the steel industry. This report outlines the essential technical and design requirements to ensure that a steel plant is capture-ready. Through a case study for a hypothetical CCSR project for capturing 0.5 million tonnes of CO2 using ASPEN Plus, a conceptual design for meeting the requirements of a carbon capture-ready steel plant is developed. The space required for the capture unit at a 0.5 million tonnes level is estimated at around 4,000m2. The comprehensive utilisation of waste heat would be advantageous for CCS applications in China’s steel production. It is recommended that back-pressure steam turbines are used to drive multi-stage CO2 compression instead of electric-motor-driven compressors with huge power loads of 7,100kW. Potential pre-investment options are identified to ease future capture retrofit.
Keywords Carbon Capture and Storage, CCS, Carbon Capture Readiness, CCS Readiness