22 May 2015
Martijn de Lange
“Metal-Organic Frameworks For Adsorption Driven Energy Transformation – From Fundamentals To Applications”
Promotores: Prof.dr. F. Kapteijn, Prof.dr. J. Gascon, Prof.dr.ir. T.J.H. Vlugt (Delft University of Technology)
After the successful defense of his PhD thesis on May, 22nd 2015, Martijn de Lange was awarded the doctor title with distinction (cum laude), something reserved only for the top 5% at the Delft University of Technology.
His promotors were prof. dr. Freek Kapteijn, prof. dr. Jorge Gascon, and prof. dr. ir. Thijs J.H. Vlugt. Martijn’s thesis, entitled ‘ Metal-Organic Frameworks For Adsorption Driven Energy Transformation – From Fundamentals to Application’ focused on the application of MOFs in heat pumps. Certain MOFs turned out to be extremely suited for this application in comparison with existing sorbents.
A novel class of materials, i.e. Metal-Organic Frameworks (MOFs), has successfully been developed that is extremely suited for application in heat pumps and chillers. They have a superior performance over commercial sorbents and may potentially contribute to considerable energy savings worldwide.
Globally about 33 % of the energy consumption is used for heating and cooling of e.g. houses and buildings. Adsorption driven heat pumps and chillers are very well suited to reduce this energy consumption and can even use low-grade waste heat or sustainable solar energy in combination with environmentally benign working fluids (e.g. water).
MOFs are porous crystalline materials built up from inorganic clusters connected by organic ligands in 1, 2 or 3 dimensions, and display a rich variety of topologies and can be functionalized in many different ways. They offer the materials scientist an outstanding platform to design new materials with superior properties.
The described research has identified MOFs with sufficient stability against water, that show the desired adsorption behavior of water. These MOF-water pairs possess higher energy efficiency and working capacity than benchmark materials and may operate with a lower driving temperature. The selected MOFs can be coated (without binder) directly on heat-exchanger surfaces for a fast response.
In short, there is a bright future for the application of MOFs in adsorption heat pumps and chillers with a large energy savings potential.