Page 171 - CW E-Magazine (27-2-2024)

Special Report

hybrid inorganic/organic structures, the homogeneous catalyst via thermo- This gives superior performance. (An-
uncoordinated metal sites, and accessible morphic multiphase system (TMS) in a gew. Chem. Intl. Ed.; DOI: 10.1002/
organic sections. MOFs have been continuous flow mini-plant. Methanol anie.202310419).
applied in gas storage and separation, was used as the polar solvent. Tertiary
ion-exchange, drug delivery, lumi- amines were made via reaction of alde- Syngas production through
nescence, sensing, nanofilters, water hyde with secondary amine and the yield dry reforming of ethanol over
purification, and catalysis. Value-added was over 90%. For the first time in RA Co/SiO catalysts
products include those via alcohol ox- the removal of coproduct was done in a 2
idation, olefin oligomerisation, and continuous way, using an organic sol- T. Li et al have studied the influence
polymerisation reactions. Reactions of vent nanofiltration (OSN). Rh loss was of SiO shell thickness on the perfor-
2
CO fixation, CO reduction and photo- very small. TMS looks promising. (ACS mance of the title catalysts. Co/SiO -
2
2
2
electrochemical water splitting are cove- Sustainable Chem. Eng., 2023; DOI: 1.5 sample with about 20-nm shell
red. MOFs have great potential. (ACS 10.1021/acssuschemeng.3c02320). thickness exhibited better properties.
Omega, 2023; DOI: 10.1021/acsome- Acetonitrile from ethanol + NH 100% ethanol conversion is reported at
ga.3c02552). 3 550°C and the targeted H /CO ratio was
2
L. Mei et al have used La-modified Co/ close to 1. (Molecular Catalysis, 2023,
Carbonate hydrogenated to Al O , with 20% Co, as dehydroami- 547, August, 113307; DOI: 10.1016/j.
2
3
formate in the aqueous phase nation reaction in a remarkable way. The mcat.2023.113307).
over Ni/TiO catalysts catalyst was fully characterised and
2
was stable; H is by product. (Ind. Eng. Activation of light alkanes at
2
X. Zhang et al have suggested the Chem. Res., 2023; DOI: 10.1021/acs. room temperature and ambi-
title route to utilise captured CO into iecr.3c0351). ent pressure
2
valuable chemicals. It is important to [An ever difficult problem has been
have an inexpensive catalyst with high Hollow STW-type zeolite sin- direct conversion of, say, CH to CH OH,
activity, selectivity and stability. A sup- gle crystals with Al gradient which has attracted a lot of attention.]
3
4
ported non-noble catalyst, Ni/TiO , is for highly-selective production
2
of p-xylene (PX) from metha-
nol-toluene alkylation H. Zhang et al have reported an aqueous
[This alkylation is commercial and high system capable of selectively convert-
ing light alkanes into correspond-
concentration of PX allows crystallisa- ing olefins and oxygenates at room
tion for recovery of PX. This column temperature and ambient pressure
has covered some papers on this sub- using Cu powder as the catalyst and O
ject.] 2
Schematic diagram of the proposed mecha- as the oxidant. For ethane, a combined
nism in Ni/TiO catalyzed carbonate hydro- F. Jiao have referred to zeolites with production of ethylene and acetic acid
2
genation to formate uniform micropores as important at a rate of 2.27 mmol per gm of Cu per
reported with great selectivity of over shape-selective catalysts. These authors hour with a combined selectivity up to
96% and excellent stability in catalys- have reported a direct synthesis of 97% was achieved. Similarly, propane
ing carbonate into formate in aqueous gave propylene with a selectivity up to
solution. (Angew. Chem. Intl. Ed.; DOI: 94% and a production rate up to 1.83
10.1002/anie.202307061). mmol per gm Cu per hour. DFT cal-
culation were done. (Nature Catalysis,
Stable and continuous produc- 2023, 6, 666-675).
tion of amines via reductive
amination in a green switch- Continuous flow oxidation of
able solvent system with effi- alcohols using TEMPO/NaO-
cient water removal Cl for the selective and scalable
hierarchical hollow STW-type zeolite synthesis of aldehydes
T.B. Riemer et al have reported highly single crystals with siliceous exterior.
selective Rh-catalysed reductive amina- These single crystals have low-to-high P. Naik et al have carried out the title
tion (RA) with integrated recycling of Al gradient from the surface to the core. reactions of primary alcohols to the

Chemical Weekly February 27, 2024 171

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