Page 176 - CW E-Magazine (10-12-2024)

Special Report Special Report

Regulation mechanism of methanol. The strategy is to adopt Pres- The big advantage of non-aqueous study in Solvay soda ash
CO capture into the novel sure Swing Distillation (PSD) coupled solvents is the avoidance of ineffective process
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non-aqueous biphasic solvent: with Extractive Distillation (ED). latent heat consumption. A comprehen- [Solvay soda ash process was a major
solid-liquid phase change Optimisation is reported. The total annu- sive evaluation has been presented. (Ind. breakthrough in the history of the chemi-
controllable al cost is reduced by 8.2%. (Sepn. Purfn. Eng. Chem. Res., 2024; DOI: 10.1021/ cal industry as not only it replaced the
Technol.,2024, 340, 15 July, 126730; acs.iecr.4C00405). polluting LeBlanc process but also due
X. Chen et al have reported a novel DOI: 10.1016/jseppur.2024;126730). to complete recovery of NH , as in 1860’s
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solid-liquid phase change controlla- Nitric oxide (NO) absorption synthetic NH process did not exist
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ble biphasic solvent ethylenediamine Pore-environment engineering from fl ue gas using an (Haber-Bosch Process came in 1910’s).]
(EDA)/2-amino-2-methyl-1propanol of pillared metal-organic- advanced oxidation process
(AMP) and N-Methylformamide (NMF). frameworks (MOFs) for with sodium persulfate Absorption of CO in aq. NH solutions
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Here, EDA was used as a phase change study is reported. There is a low enthalpy at room temperature. The turning-on of boosting the removal of solution has been considered outside the Solvay
modulator to regulate solid-liquid phase change in absorption and excellent the magnetic fi eld releases C H , as the acetylene from ethylene process as it has a low regeneration tem-
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change nodes. The CO load could go up regenerative performance. (Sepn. Purfn. magnetic-induced heating drives the [In naphtha cracking as well as ethane J. Liu et al have referred to wet scrub- perature, low corrosion rates of plant
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to 1.07 mole per mole and about 91% of Technol., 2024, 339, 2 July, 126647; adsorbents to lose their activity through cracking, acetylene (C H ), to the extent bing as an effective NO emission control equipment, low cost and resistance to
nd
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CO enriched into the solid phase. The DOI: 10.1016/j.seppur.2024.126647). conformational change of pores derived up to 2%, depending on severity, is pre- technology for marine diesel engines. degradation, etc. Since use of NH is
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mechanism is explained; EDA reacts from aromatic rings tilting and rotation. sent in ethylene (C H ) and its selective Na S O effectively oxidises NO to integral to the Solvay process it can
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very fast with CO . (Sepn. Purfn. Tech- Selective recovery of Sm The working capacity can reach 16.8 removal is important. Selective absorp- promote absorption. These authors also be used to capture CO from tail
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nol., 2024, 340, 15 July, 126751; DOI: from Sm-Co magnet scrap by cc per gm, which is better than the tion is practiced and mostly selective have studied the kinetic of absorption. gas streams, and process liquids can
10.1016/j.seppur.2024.126751). vacuum distillation regular versions. This is an interesting hydrogenation to C H without any C H The potential of this method has been be returned to the production process.
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strategy. (Sepn. Purfn. Technol., 2024, formation is carried out.] 2 6 discussed. (Ind. Eng. Chem. Res., 2024; Savings in the use of CaCO are also
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Hierarchically microporous Sm-Co rare earth permanent magnet 348, 25 Nov. 127723; DOI: 10.1016/j. DOI: 10.1021/acs.iecr.3C03993). pointed. (Chem. Eng. Res. Des., 2024,
membranes for highly-effi cient materials are widely used in different seppur.2024.127723). Z. Guo et al have suggested the title pro- 205, May, 174-187; DOI: 10.1016/j.
gas separations applications. Sm-Co magnet scraps are cess to make polymer grade C H . Both A novel internal coupling cherd.2024.03.033).
generated during the preparation and Hybrid behaviours of CO theoretical and experimental work was process of a T-type zeolite
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S. Luo et al have reviewed recent research the use of end-of-life of magnets. This absorption into blended 2 carried out. -CH functionalised MOF, membrane in a distillation A sulfonated covalent organic
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progress on microporosity manipu- separation has been attempted by diffe- DEEA-based solution for ZU-901, gave the highest separation column to separate propylene framework (COF) for
lation in high-free-volume polymeric rent methods such as hydrometallurgy, the improvement of capture with a capacity of 0.57 mmol per gm at glycol monomethyl ether (PM) atmospheric water harvesting
gas separation membranes and their gas pyrometallurgy, etc. Here Y. Bai et al performance 0.01 bar; selectivity was 83 for 1% C H ,
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separation performance. The state-of- have proposed vacuum distillation for [CO absorption continuous to attract a 99% C H . (Ind. Eng. Chem. Res., 2024; J. Fu et al have referred to the title P. Schweng et al have reported the title
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selective recovery of pure Sm. Experi- lot of attention.] DOI: 10.1021/acs.iecr4C00148). process to recycle the PM component, COF which is capable of atmospheric
ments were done in a vacuum furnace where the membrane unit was inter- water harvesting in arid conditions. The
with double temperature zones with D. Wu et al have studied the hybrid Flue gas SO capture nally embedded in the column vessel uptake study was done and the network
effi cient condensation of Sm vapours; behaviours of DEEA (N,N-diethyl- technology 2 to remove water before the distillate. displayed steep water sorption at low
99% pure Sm was obtained. (Sepn. Purfn. aminoethanol), monoethanolamine Internal coupling was successful, as relative humidity (RH) in temperatures
Technol., 2024, 348, 25 Nov.127746; (MEA), 2-Methylaminoethanol (MAE) J. Xie et al have given an overview of this successfully breaks the PM-water of up to 45°C, reaching a water uptake
th
DOI: 10.1016/j.seppur.2024.127746). and 2-((2-aminoethyl)amino)-ethanol the title subject to control SO pollu- azeotrope. (Ind. Eng. Chem. Res., 2024; of 0.12 gm per gm at 10% RH and even
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the-art strategies to construct the title (AEEA) as absorbents for CO . The tion. Aspects of chemical absorption DOI: 10.1021/acs.iecr.4C00163). 0.08 gm/gm at just 5% RH. Repeated
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membranes are summarised. (Industrial Magnet MOFs with fl exibility key point is the energy in regeneration are discussed with respect to absorbent experiments were done for adsorption
Chemistry & Materials, 2023, 1, 376- for effi cient magnetic-induced of the loaded absorbent. Experimental and process enhancement. Aqueous and Initial carbon capture pilot and desorption without any signifi cant
387; DOI: 10.1039/D2IM00049K). swing adsorption (MISA) data showed that DEEA/MAE solution non-aqueous solvents are considered. detriment to adsorbent. (ChemSusChem,
exhibits much higher CO cyclic capacity. The use of ionic amino acid aqueous 2024; DOI: 10.1002/cssc.202301906).
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Thermodynamic and kinetic X-M. Li et al have fabricated magnetic (J. Chem. Technol. Biotechnol.,2024, solution reduces the volatilisation of the
study of the absorption of MOFs with fl exibility for adsorption of April; DOI: 10.1021/jccb.7650). effective components of the absorbent. Conceptual methods
phosphine (P) by methanol propane (C H ). Here magnetic-induced for synthesis of reactive
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heating is exploited to get temperature Purifi cation of methyl distillation (RD) processes
P is a toxic gas and e.g., generated in the swing. This strategy is effective and has methacrylate (MMA)
production of sodium hypophosphite, an easy operation; fast heat generation, A.A. Kiss et al (Kiss has made many
yellow phosphorus, etc. Y. Yang et al and short distance of heat transfer. On the J. Zhong et al have suggested a new valuable contributions in separa-
have come out with a new strategy of turning off of magnetic fi eld the adsor- distillation process for purifying MMA tion technology) has covered recent
absorption of P in methanol and the title bents show open pores for C H uptake from azeotrope of MMA, water, and developments and perspectives in the
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176 Chemical Weekly December 10, 2024 Chemical Weekly December 10, 2024 177
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