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3 ENERGY-EFFICIENT PROCESSES OPHINA 3.7 OPHINA – Organic solvent nanofiltration for energy-efficient processes BMBF Project FKZ 033RC1001 Project Coordinator: Dr. Daniela Kruse, Evonik Industries AG Project Partner: Bayer Technology Services GmbH, BASF Personal Care and Nutrition GmbH, RWTH Aa- chen 3.7.1 Introduction Avoiding CO2 emissions is an important element in the strategy to reduce levels of climatically relevant gases. In addition to mitigating CO2 emissions by finding substitutes for fossil fuels, a key role is also played by measures designed to lower consumption of typically fossil-based energy resources. Optimising the energy efficiency of processes can make an important cont- ribution to CO2 abatement. Many processes in the chemical industry use solvents and these have to be recovered later on in procedures that consume a lot of energy. By using energy-efficient separation methods, the energy consumed by a process and therefore the CO2 emissions associated with it can be reduced signifi- cantly. One such energy-efficient separation technology is organic solvent nanofiltration (OSN), which, in contrast to conventional thermal separation techniques, does not require the input of heat. The goal of the collaborative research project ‘Ophina’ was to develop technology that would reprodu- cibly produce OSN membrane modules at consistently high quality for use in industrial-scale separation processes. The work focused, in particular, on key module parameters such as solvent resistance, permeate flux, retention (selectivity) and long-term mechanical stability. 3.7.2 Project description The objective of the Ophina project was to develop a new generation of membrane modules based on composite membranes. Composite membra- nes were chosen as they showed improved mechanical stability, solvent re- sistance, selectivity and permeability in OSN applications. The aim was to manufacture a variety of membrane modules and then subject them to user testing. The tests in a wide range of applications were designed to determi- ne precisely how organic solvent nanofiltration saves energy and resources. Other questions of interest included the potential of OSN to replace or com- 232PDF Image | Chemical Processes and Use of CO2
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