In this study, the capital cost of equipment is estimated using the comprehensive database published by Woods 25 also further elaborated in ref. In Woods, the equipment cost in carbon steel (CS), C Eq,CS , is provided in USD at a reference CEPCI index of 1000. This is also referred to as Free On Board (FOB). For most equipment, a base equipment cost is provided for a reference capacity with scaling to the actual capacity using an equipment-specific sizing exponent, n: