Aromatic hydrogenation of benzyl alcohol and its derivatives using compressed CO2/water as the solvent

Lin, Horn-Bond; Yen, Clive H.; Tan, Chung‐Sung

doi:10.1039/c2gc15999f

Cited by 32 publications

(15 citation statements)

References 37 publications

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“…Resulting parameters and evaluated LoDs are listed in table 3: Here all K's are similar in the order a few 10 4 L•mol -1 , which is ~ 5 orders-of-magnitude smaller than K's for Cs + ion exchange with zeolite mordenite (Alghamdi et al 2019). All four successful zeolites lead to benzyl alcohol-sensitive WGTFTs with LoDs of a few μM, 5 orders-of-magnitude lower than the concentration of a saturated benzyl alcohol solution in water (~ 370 mM at 25 o C (Lin et al 2012)), and below the 'potability limit' (the concentration that should not be exceeded in water for human consumption) of 19 M (Toxnet, BENZYL ALCOHOL). Saturated threshold shift is large, particularly for zeolite…”

Section: Fig 2amentioning

confidence: 83%

Sensing aromatic pollutants in water with catalyst-sensitized water-gated transistor

et al. 2020

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Some materials that are active heterogeneous catalysts for the breakdown of non-ionic aromatic solutes in water are found to act as potentiometric sensitizers for same solutes.As an example, here the aromatic water pollutant, benzyl alcohol, was sensed with a limitof-detection (LoD) below its potability limit of 19 M. Our findings are rationalized on the grounds that both catalysis and sensing rely on adhesion of analyte/substrate on the sensitizer / catalyst. Specifically, a set of powdered transition metal doped zeolites and related frameworks that catalyze the oxidation of waterborne aromatic pollutants were dispersed in phase transfer matrices. Matrices were introduced into water-gated thin film transistors (WGTFTs) that act as potentiometric transducers. Potentiometric sensing of non-ionic waterborne pollutants is limited to molecules with a 'free' molecular dipole, i.e. a dipole that is not locked in the molecular plane. The present work establishes an application for catalysts beyond catalysis itself. The use of catalysts as sensitizers is recommended for wider uptake and in reverse, to screen candidate catalysts.

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Section: Fig 2amentioning

confidence: 83%

Sensing aromatic pollutants in water with catalyst-sensitized water-gated transistor

et al. 2020

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“…On the other hand, carbonic acid, which can be obtained by water and carbon dioxide, may be a greener alternative because carbon dioxide can be removed by simple depressurization. There are a few reports for using water and high‐pressured carbon dioxide as solvent for liquid phase hydrogenation with supported metal catalysts …”

Section: Introductionmentioning

confidence: 99%

Furfuryl Alcohol and Furfural Hydrogenation over Activated Carbon–supported Palladium Catalyst in Presence of Water and Carbon Dioxide

Nanao

Murakami²,

Sato³

et al. 2017

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Hydrogenation of furfuryl alcohol and furfural over an activated carbon‐supported palladium catalyst was carried out and the effects of solvent and carbon dioxide on the activity and selectivity of the reactions were studied. For the hydrogenation of furfuryl alcohol and furfural, the addition of protic solvents led to a higher initial activity compared to that under neat conditions. Among the protic solvents, water caused the highest increase in the initial activities. When carbon dioxide was added to protic solvents, the initial activities increased further. For a system containing both water and carbon dioxide, the initial activity increased when the pressure of carbon dioxide introduced was increased up to 10 MPa, after which the activity remained almost constant. The results of the hydrogenation of furfural over the supported palladium catalyst showed that tetrahydrofurfural and furfuryl alcohol were the initial products; furfuryl alcohol was subsequently reduced to tetrahydrofurfuryl alcohol.

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“…In our previous report, it was found that the hydrogenation of benzyl alcohol had two reaction pathways, which include the hydrogenation of aromatic ring to yield cyclohexenemethanol and cyclohexanemethanol, and the hydrogenolysis of C-O bond to yield toluene and methylcyclohexane. 17,18 When using Ru metal as the catalyst, C-O bond cleavage was suppressed, and therefore, the hydrogenation of benzyl alcohol could obtain high product selectivity toward cyclohexyl products. To the best of our knowledge, the hydrogenolysis of benzylic alcohols using CXLs and compressed CO 2 /water as the solvents has never been reported before.…”

Section: Introductionmentioning

confidence: 99%

CO2 promoted hydrogenolysis of benzylic compounds in methanol and water

et al. 2013

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Aromatic hydrogenation of benzyl alcohol and its derivatives using compressed CO2/water as the solvent

Cited by 32 publications

References 37 publications

Sensing aromatic pollutants in water with catalyst-sensitized water-gated transistor

Sensing aromatic pollutants in water with catalyst-sensitized water-gated transistor

Furfuryl Alcohol and Furfural Hydrogenation over Activated Carbon–supported Palladium Catalyst in Presence of Water and Carbon Dioxide

CO2 promoted hydrogenolysis of benzylic compounds in methanol and water

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