Performance Criteria for Process Schemes, Atom Economy, and Environmental Quotient

Roger Sheldon, of TU Delft (Delft, The Netherlands), has compiled a list of trends for chemical and biochemical process technology (Sheldon, 1994) they are towards 

Some of those criteria have been discussed above in the context of the catalyst or the process, such as enantioselectivity or diastereoselectivity instead of simple selectivity to product, and catalyst performance data such as turnover frequency (tof), turnover number (TON), total turnover number (TTN), and space-time-yield (s.ty.). 

Others have to deal with inputs and outputs of the process apart from reactants, catalysts, and products, such as  

the atom economy, i.e., the fraction of carbon (or other elements) of the substrate that is utilized or recovered in the product 

the specific consumption (consumption per kg product) of solvents, salts, and other auxiliaries such as work-up materials (active carbon, filter aids), and 

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Performance Criteria for Process Schemes, Atom Economy, and Environmental Quotient... 

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