Organic reactions in subcritical and supercritical water

Kuş, Nermin Şimşek

doi:10.1016/j.tet.2011.10.070

Cited by 82 publications

(20 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hydrogenation of ethylene is an exothermic reaction, with the standard‐state reaction enthalpy of −136.3 kJ . mol −1 . In addition, ethylene can also react with steam to produce ethanol as shown in Equation (6).…”

Section: Resultssupporting

confidence: 52%

“…In addition, another type of reforming is the decarboxylation of carboxylic acids. Equation (3) shows the general form of the decarboxylation reaction; Equations (4) and (5) show examples of decarboxylation of formic acid and acetic acid

R - italicCOOH \to R - H + C O_{2}

italicHCOOH ((), g) \to C O_{2} ((), g) + H_{2} ((), g) Δ H_{298.15 K}^{o} = prefix- 14.9 normalkJ true/ normalmol

C H_{3} italicCOOH ((), g) \to C H_{4} ((), g) + C O_{2} ((), g) Δ H_{298.15 K}^{o} = prefix- 36.1 normalkJ true/ normalmol

with values for the standard enthalpies taken from Wagman .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

A study on supercritical water gasification of black liquor conducted in stainless steel and nickel-chromium-molybdenum reactors

Blasio

Lucca

Özdenkçi

et al. 2016

J. Chem. Technol. Biotechnol.

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 52%

R - italicCOOH \to R - H + C O_{2}

italicHCOOH ((), g) \to C O_{2} ((), g) + H_{2} ((), g) Δ H_{298.15 K}^{o} = prefix- 14.9 normalkJ true/ normalmol

C H_{3} italicCOOH ((), g) \to C H_{4} ((), g) + C O_{2} ((), g) Δ H_{298.15 K}^{o} = prefix- 36.1 normalkJ true/ normalmol

with values for the standard enthalpies taken from Wagman .…”

Section: Resultsmentioning

confidence: 99%

A study on supercritical water gasification of black liquor conducted in stainless steel and nickel-chromium-molybdenum reactors

Blasio

Lucca

Özdenkçi

et al. 2016

J. Chem. Technol. Biotechnol.

View full text Add to dashboard Cite

“…The increase in the calorific values for SM 1 and SM 2 was influenced by their cellulose and hemicellulose content. As reaction temperatures increase, the calorific value of solid products increases, but the amount of solid product decreases due to [7,[18][19][20][21]. Therefore, in hydrothermal reactions, an optimum temperature should be maintained to maximize the energy recovery efficiency (ERE) [22][23][24].…”

Section: Changes In Calorific Value and Energy Recovery Efficiencymentioning

confidence: 99%

Conversion of Municipal Solid Wastes into Biochar through Hydrothermal Carbonization

Kim¹,

Park²,

Yoshikawa³

2017

Engineering Applications of Biochar

View full text Add to dashboard Cite

In this study, the hydrothermal treatment of municipal solid wastes (MSWs) for the production of biochar as a renewable solid fuel was investigated. The properties of surrogate MSWs and mixtures of newspaper and vegetables were greatly improved by hydrothermal treatment and were similar to those of coal-like fuel substances. Hydrothermal treatment increased the calorific value, the fixed carbon, and carbon contents. The composition of the major biomass components of MSW was found to affect the alternation of their physical and chemical properties significantly. These characteristic changes in pure cellulose, hemicellulose, and lignin were similar to those of coalification at the hydrothermal reaction temperature range of 150-280°C. The treated products became a solid fuel substance, the characteristics of which corresponded with fuel between lignite and subbituminous coal. The results of this study indicate that hydrothermal treatment can be used as an effective means to generate highly energy-efficient renewable fuel resources using MSWs.

show abstract

“…33 Water, which is heated at a temperature range of 100 °C -374.2 °C and pressurized enough to keep it in the liquid state in this range is defined as subcritical water. 34 Subcritical water offers the unique medium for various processes such as oxidation, extraction, 35,36 solubility 37 and organic reaction synthesis 38 through tunable solvent and other physico-chemical properties. 36 The dielectric constant that determines the polarity of a solvent can be easily reduced by increasing the temperature in subcritical water.…”

Section: Introductionmentioning

confidence: 99%

“…Many reactions such as alkylation, condensation, coupling, decomposition, Diels-Alder, decarboxylation, dehydration, elimination reactions and nano-synthesis can be carried out using subcritical water. 38,40,41 In this study, we designed and synthesized octahydropyrrolo [3,4-c]pyrrole N-benzoylthioureas and a series of novel 2-(thiazol-2-yl)-octahydropyrrolo [3,4-c]pyrrole derivatives in subcritical water as green solvent, and investigated their anti(myco)bacterial and antifungal activities.…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of highly functionalized octahydropyrrolo[3,4-c]pyrrole derivatives using subcritical water, and their anti(myco)bacterial and antifungal activity

Nural¹,

Gemili²,

Yabalak³

et al. 2018

Arkivoc

View full text Add to dashboard Cite

A series of novel 2-(thiazol-2-yl)-octahydropyrrolo [3,4-c]pyrroles was synthesized by reaction of octahydropyrrolo [3,4-c]pyrrole N-benzoylthiourea derivatives and α-haloketones in subcritical water at 130 °C in 75-91% yield. Both the thiourea intermediates and the end products were synthesized in subcritical water, which proved a suitable green alternative to acetone by delivering the desired compounds in much shorter reaction times and practically the same yields. The antimicrobial activity of the compounds was determined against five bacterial strains and three fungal strains, and MIC values of 15.62-250 g/mL were observed. Moreover, the compounds exhibited antimycobacterial activity against M. tuberculosis H37Rv with MIC values of 7.81-62.5 µg/mL.

show abstract

Organic reactions in subcritical and supercritical water

Cited by 82 publications

References 69 publications

A study on supercritical water gasification of black liquor conducted in stainless steel and nickel-chromium-molybdenum reactors

A study on supercritical water gasification of black liquor conducted in stainless steel and nickel-chromium-molybdenum reactors

Conversion of Municipal Solid Wastes into Biochar through Hydrothermal Carbonization

Green synthesis of highly functionalized octahydropyrrolo[3,4-c]pyrrole derivatives using subcritical water, and their anti(myco)bacterial and antifungal activity

Contact Info

Product

Resources

About