Paula C, Böhme U, Hartmann M (2013)
Publication Status: Published
Publication Type: Conference contribution, Conference Contribution
Publication year: 2013
Publisher: Deutsche Wissens. Gesell. fur Erdoel, Erdgas und Kohle EV
Book Volume: 2013
URI: https://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84907271291&origin=inward
In the chemical industry, the largest part of energy is spent on separation processes such as the separation of olefin/paraffin mixtures from steam cracker effluents by low-temperature rectification. A suitable alternative to this energy and cost intensive process is separation by selective adsorption with suitable microporous adsorbent. In this work, different ZIFs (Zeolitic Imidazolate Frameworks) have been explored with respect to their separation of olefins and paraffins. The studied materials (e.g. ZIF-8 (SOD-Topology), ZIF-71 (RHO-Topology) were selected because of their low diameter of the largest pore entrance (0.29 to 4.2 nm) which is close to the kinetic diameter of the C to C olefins and paraffins under study. In contrast to other MOF- or zeolite-based adsorbents, in ZIF-8 and ZIF-71, the paraffin is preferentially adsorbed, which is evident from the single-component adsorption isotherms at different temperature. In the corresponding mixture breakthrough curves (Figure 1), the olefin breaks through first and the alkane even displaces the olefin from the pores. Thus, ZIF-8 and ZIF-71 are interesting candidates for the envisaged paraffin/olefin separation. Whether the observed separation behavior is due to the structural properties of the studied ZIFs or a consequence of peculiar chemical properties is subject to further studies.
APA:
Paula, C., Böhme, U., & Hartmann, M. (2013). Zeolitic imidazolate frameworks with optimized pore structure for olefin/paraffin-separation. Deutsche Wissens. Gesell. fur Erdoel, Erdgas und Kohle EV.
MLA:
Paula, Carolin, Ulrike Böhme, and Martin Hartmann. "Zeolitic imidazolate frameworks with optimized pore structure for olefin/paraffin-separation." Deutsche Wissens. Gesell. fur Erdoel, Erdgas und Kohle EV, 2013.
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