| 1. |
- Abel, S, et al.
(author)
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Two-fraction and three-fraction continuous simulated moving bed separation of nucleosides
- 2004
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In: Journal of Chromatography A. - : Elsevier BV. - 0021-9673 .- 1873-3778. ; 1043:2, s. 201-210
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Journal article (peer-reviewed)abstract
- A new experimental set-up and a new simulated moving bed (SMB) operation are presented in this work. A desktop SMB unit developed as a modification of the commercial AKTA(TM) explorer working platform has been utilized for the separation of different mixtures of nucleosides. Both two fraction and three fraction SMB separations have been carried out, the latter made possible by the adoption of a new SMB configuration and operating mode (three fraction SMB, 3F-SMB, operation). Experiments demonstrate the feasibility of the 3F-SMB operation, and confirm the trends predicted based on considerations about retention of the components to be separated along the unit.
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| 2. |
- Diewald, K., et al.
(author)
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Thermodynamic analysis of low GWP HFO and HCFO Refrigerants in HTHP with large temperature glides on the heat sink
- 2020
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In: IIR Rankine Conference 2020. - : IIF-IIR.
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Conference paper (peer-reviewed)abstract
- High temperature heat pumps (HTHP) supplying process heat have a large application potential in the food, paper, and chemical industries. In this study, the low-GWP hydrofluoroolefins (HFO) and hydrofluorochloroolefins (HCFO) R1234ze(Z), R1336mzz(Z), R514A, R1233zd(E) and R1224yd(Z) are analysed as refrigerants in a single-stage IHX cycle, a two-stage extraction cycle (2SE) and a two parallel cycle (2CP). Achieving high temperature glides on the heat sink with supply 100 °C to 160 °C and 70 °C inlet temperature is a focus of the study. At 130 °C supply temperature, the COP of the 2SE and 2CP cycles improves around 2.5 % and 7.8 % respectively compared to the IHX cycle. R1336mzz(Z) provided the highest COP in all three cycles, however the lowest volumetric heating capacity (VHC). In both, the 2CP and the 2SE cycle,the exergy losses in the condenser are reduced compared to the IHX cycle.
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