Page 167 - CW E-Magazine (9-1-2024)

Special Report

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

Processes and Products

Catalytic Processes

removal and provide more sustainable
solutions. These authors have done
experimental and numerical characteri-
sation of the oxidation of C H /CH /N /
4
2
2
4
O mixtures under different operative
2
conditions, which included extremely
low temperatures. Most sustainable
and convenient operative conditions
are given. (Ind. Eng. Chem. Res., 2023;
DOI: 10.1021/acs.iecr.3c00402).
H production from NH
2
3
[There is global infrastructure for the
transportation of NH and even turbines
3
have been developed to burn NH as a
3
fuel. There is a lot of activity in using
Epoxidation of ethylene to ethy- computational screening of the metals in NH as a H carrier and hence decompo-
2
3
lene oxide (EO): First principles the Periodic Table to identify prospective sition of NH to N + H and separation
3
2
2
catalyst screening superior catalysts and experimentally has received a lot of attention and this
[Epoxidation of ethylene with O on demonstrate that Ag/CuPb, Ag/CuCd column has covered this subject.]
2
a silver-based catalyst was a major and Ag/CuTl outperform the Ag cata-
breakthrough in replacing the polluting lysts and also allow scalable synthesis. D. Liang et al have referred to the speci-
chlorohydrin process, in 1930’s, and An elaborate modeling was done. This fic energy cost of in situ H production
2
since than the selectivity has improved study proves the value of computational from NH as lower than common en-
3
from around 65% to 84%. Fundamental catalyst design, which can be adopted for ergy sources such as LPG. Ru and Ni
studies are reported.] other processes. (Angew. Chem. Intl. Ed.; catalysts are the most worthy catalysts.
DOI: 10.1002/anie.202305804). The design of support is important. Fur-
M. Hus et al have referred to the empiri- ther, electrocatalytic and photocatalytic
cal discoveries and dopants and co-cata- Extremely low temperature for decomposition of NH is also receiving
3
lysts. These authors have carried out a the synthesis of ethylene oxide attention. Membrane reactors can be in-
(EO) tegrated. (Catalysis Sci. Technol., 2023;
DOI: 10.1039/D3CY00042G).
B.A. DeLiso et al have referred to
the use of liquefied C H and oxy- Exploiting adsorption/diffusion
2
4
gen-enriched air, a low cost waste in synergy in MFI-catalysed hexane
membrane based N production, which isomerisation reactor
2
can provide convenient ways of heat
Hexane isomerisation is practiced to
make isomeric compounds (mono- and
di-), which have high octane numbers.
R. Krishna has reported that with MFI
catalyst in a fixed bed reactor there is
a synergy between mixture adsorption
equilibrium and intra-crystalline diffu-
sion. This synergy can be best exploited

Chemical Weekly January 9, 2024 167

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