Page 173 - CW E-Magazine (11-3-2025)

Special Report

sulphur and nitrogen content to avoid ficant approaches that have appeared in Metal phthalocyanine-based
puffing; low electrical resistivity; appa- the literature in the span of 2015-2024 two-dimensional conjugated
rent densities; soft carbon; morphology/ and covers the selective depolymerisa- MOFs for electrochemical
shaping, etc. tion process to usable monomers using glycerol (G) oxidation reaction
chemical catalysts. (Green Chem., 2024;
The type and molecular composition of DOI: 10.1039/D4GC 04768K). Huang et al have referred to the title
feedstocks affect the quality of coke, reaction as promising as it couples with
and these could be petroleum-derived Electrochemical processes cathodic reaction like H evolution
2
or non-petroleum derived. The first reaction, to make high-value product
one is from FCC Clarified Slurry Oil Porous substrate optimisation with less energy consumption. For the
(CSO), thermal tars and pyrolysis heavy for efficient water electrolysis: above objective, two-dimensional conju-
oil. In the second case is coal tar pitch. Uncovering electrocatalysts, gated MOFs (2DC-MOFs), comprising
The feedstocks must consist primarily electrolyte, and bubble square-planar metal-coordination motifs
of polynuclear aromatics as precursor dynamics (e.g. MO , M(NH) , MS ) are notable
4
4
4
to the formation of graphitisable and for their programmable active sites,
crystalline coke. Delayed coking is used K. Tsuburaya et al have referred to the excellent stability, etc. and this make
to produce needle coke or carbon pre- importance of water electrolysis for them promising for the title reaction.
cursors; coking technology is discussed. making H as a clean energy carrier. This work shows that CO (NiP S ) gives
2
6 8
(Hydrocarbon Processing, 2024, Cost reduction will happen with opera- superior performance among non-noble
2
Oct). metal complex. (Angew. Chem. Intl. Ed.
tions at a high current density. However, 2024; DOI: 10.1002/anie 2024 16178).
excessive bubble formation deteriorates
Sustainability and performance. Engineering substrates can Design development of
technoeconomic assessment assist the above problem and minimise integrated methane pyrolysis
of polygeneration process for additional overpotential. This work has (MP) and reforming
LNG cold recovery optimised porous substrate to maximise processes for low-carbon urea
[This column has emphasised the impor- the O evolution rate and improve overall production
2
tance of cold recovery in LNG terminals, performance. Numerical simulations
as is done in Japan and South Korea, and were done. Optical bubble characteri- M.R.G. Pangestu et al have referred
it is a pity that, as of now, even in our sations were done to track the primary to pyrolysis of methane to give H and
2
biggest terminal of 17.5 mtpa at Dahej, bubble size. This study leads to a conclu- solid carbon as a saleable byproduct.
it is not done.] sion that the simultaneous development These authors have examined technical
of electrocatalysts, electrolytes, and and financial viability of incorporating
H. Ganta et al have discussed polygene- substrates is required. (ACS Sustainable MP into a traditional steam methane
ration process that encompasses cold Chem. Eng. 2024; DOI: 10.1021/acssus- reforming (SMR) – NH urea facility via
3
energy recovery, and process simulation chemeng.4c 05790). dividing NG feed between the SMR and
and optimisation is reported. (Chem.
Eng. Technol. 2024; DOI: 10.1002/
ceat.202400174).

Advances in catalytic chemical
recycling of synthetic textiles
[This column has covered this subject
as it is becoming increasingly important
to valorise synthetic fibre based used
fabrics.]

Synthetic textiles are non-biodegradable
polymers and hence depolymerisation
into reusable monomers becomes im-
portant. This review covers most signi-

Chemical Weekly March 11, 2025 173

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