講演会
演 題： Adsorptive Heat Pumps- Can MOFs replace existing sorbents? 講 師： Prof. Freek Kapteijn
Catalysis Engineering-ChemE,
Delft University of Technology, The Netherlands
日 時： 2015 年 11 月 16 日（月）10:30~12:00
場 所： 工学部フロンティア応用科学研究棟 2F レクチャーホール（鈴木章ホール）
共 催： 北海道大学「物質科学フロンティアを開拓する Ambitious リーダー育成プログラム」
Globally about one-third of the energy consumption goes into 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.
Metal Organic Frameworks, MOFs, are porous crystalline materials built up from inorganic clusters connected byorganic ligands in 1, 2 or 3 dimensions. Their rich variety of topologies and various options for functionalization
hold potential for application in a plethora of fields. They offer the materials scientist an outstanding platform todesign new materials with superior properties.
Here, the application of MOFs for adsorption chillers (AC) and adsorption heat pumps (AHP) is explored and theirperformance is compared with classical sorbents currently applied (activated carbon, zeolites and silica) [1].
Preferred working fluids are water (high heat of condensation), methanol and ethanol (both can be used below 0oCelsius), all having sufficient vapour pressure in the temperature range of interest.
Important properties the MOFs have to comply with in relation to heat pumps are inevitably a long term stability
towards the working fluid, a steep uptake in the relative pressure range of 0.05-0.4, easy desorption (no hysteresis), a
good volumetric adsorption capacity, and an adsorption enthalpy close to the enthalpy of condensation.
Various MOFs have been identified that comply with these requirements. The most common water adsorption
mechanism will be discussed [2]. For CAU-10H, however, the water uptake resembles a phase change, withconstant adsorption enthalpy and an entropy change pointing at a phase between water and ice [3,4].
Both for AC (CAU-10H [3]) and AHP (MIL-160 [5]) certain MOFs reveal Coefficients of Performance (COP) thatare better than current materials and they need smaller temperature windows for operation (difference between
adsorption and regeneration temperatures).
Lastly the application of CAU-10H as a coating on a heat exchange surface is presented and the thermal adsorption
cycling performance is compared with that of a powder sample.
1. M. M.F. de Lange, K.J.F.M. Verouden, T.H.J. Vlugt, J. Gascon, F. Kapteijn, Chem. Reviews, 2015 DOI:
10.1021/acs.chemrev.5b00059
2. M. F. de Lange, J. J. Gutierrez Sevillano, S. Hamad, T. J. H Vlugt, S. Calero, J. Gascon, and F. Kapteijn. The
Journal of Physical Chemistry C 117 (2013) 7613-7622.
3. M. F. de Lange, C. P. Ottevanger, M. Wiegman, T. J. H. Vlugt, J. Gascon and F. Kapteijn, Cryst.Eng.Comm.
17 (2015) 281-285.
4. M. F. de Lange, T.Zeng, T. J. H. Vlugt, J. Gascon and F. Kapteijn, Cryst.Eng.Comm. 17 (2015) 5911–5920.
5. Cadiau et al., Advanced Materials 27 (2015) 4775–4780.
本講演は、大学院総合化学院『化学研究先端講義/総合化学特別研究第二』の一部として認定されています。

連絡先：工学研究院応用化学部門 増田隆夫（内線：6550）

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