** Interestingly, alumina has been identified as promising for other reasons too. It has the lowest cradle-togate, and cradle-to-grave carbon footprint compared to other amine-functionalised supports and is more stable than silica in the presence of steam. Email: jpy1@hw.ac.uk RCCS, Heriot-Watt University . Properties of amine-functionalised nano-fibrillated cellulose were used to represent cellulose, whilst properties of γ-alumina were used to represent alumina, and properties of SBA-15 were used to represent silica. Meanwhile, Lewatit is simply Lewatit® VP OC 1065, an example of a functionalised resin. Here, some of the properties are measured after functionalisation. The exact values should be taken cautiously.