Page 173 - CW E-Magazine (24-10-2023)

Special Report

A rapid wrap-up of what’s new in Operations,

Processes and Products

Separation Technology

water. This was then upscaled and commis-
sioned in industrial environment. Starting
from small seed crystals in solution, it was
possible to grow, separate, and dry product
particles. (Chem. Eng. Technol., 2023: DOI:
10.1002/ceat.202200616).

Linker vacancy engineering of
a robust ftw-type Zr-MOF for
hexane isomers
[This column has covered some papers
on MOFs and COFs for separations in
an elegant and purposeful way for pos-
sible industrial adoption for propane/
propylene, C-6 isomers, etc.]
Fu-An Guo et al have reported a
microporous ftw-type Zr-based MOF
structure, HIAM-410 (HIAM= Hoff-
mann Institute of Advanced Materials),
built an hexa-nuclear Zr cluster and
6
Removal of urea from water Q. Cui et al have reported a novel ceramic pyrene-1,3,6,8-tetracarboxylate (ptc ).
4-
composite membrane configuration to This material has shown promising
D. Weerakoon et al have critically improve the heat recovery performance results for the separation of hexane
reviewed this subject of considerable from the stripped gas. Here, tubular isomers. (Angew. Chem. Intl. Ed.; DOI:
industrial interest and water can be hydrophobic and hydrophilic ceramic 10.1002/anie.202303527).
recycled. The scale of this problem varies membranes were serially assembled
considerably. All the available urea to form a single composite membrane. C3 separation
removal technologies are reviewed and The stripped gas and bypassed CO -rich [This column has covered many papers
2
these include adsorption, hydrolysis, solvent blowed counter-current on both on propylene-propane separation in view
advanced oxidation, membrane separa- sides of the composite membrane. Eight of high capital and energy costs in the
tion and biological removal. Advantages membrane confi gurations were studied. existing very tall distillation columns.]
and disadvantages of different methods Benefi ts are highlighted. (J. Membrane
have been discussed. (Sepn. Purfn. Tech- Sci., 2023, 676, 15 June, 121606: DOI: D.A. Kang and H-K. Jeong have repor-
th
nol., 2023, 314, 1 June, 123652; DOI: 10.1016/j.memsci.2023.121606). ted polycrystalline ZIF-8 membranes by
st
10.1016/j.sep.pur.2023.123656). a secondary growth method modifi ed
From lab to pilot scale: Com- with an addition of 1,4-butanediol. It is
Waste heat recovery enhance- missioning of an integrated fascinating to see the characteristics that
ment in the CO chemical device for the generation of are reported. (J. Membrane Sci.; DOI:
10.1016/j.memsci.2023.121593; 677,
2
absorption crystals 5 July 2023, 121593).
th
[This column has covered many papers
on the chemical absorption/desorption T. Dobler et al have reported the modular Y. Pu et al have reported a COF-induced
of CO and ways of energy reduction in belt crystalliser and characterised in lab seeding strategy to fabricate MOF mem-
2
the desorber by different methods.] scale with the model system, sucrose/ branes. This has uniform pore size, high

Chemical Weekly October 24, 2023 173

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