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Green Chemistry
Volumn 14, Issue 4, 2012, Pages 1178-1188
Homogeneous catalytic hydrogenation of long-chain esters by an osmium pincer complex and its potential application in the direct conversion of triglycerides into fatty alcohols
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EID: 84859142164     PISSN: 14639262     EISSN: 14639270     Source Type: Journal    
DOI: 10.1039/c2gc15960k     Document Type: Article
Times cited : (56)
References (37)
  • 30
    • 85034386678 scopus 로고    scopus 로고
    • The fact that the hydrogen uptake data presented here do not directly correspond to the stoichiometries of the quantitative yields as determined by GC (see Table 1) reflects the strongly non-linear response of the non-ideal hydrogen/toluene gas phase composition in the reactor headspace as a function of total pressure at the reaction temperature, which lies above the boiling point of toluene. E.g., a 6-fold increase in conversion as a function of time (entries 4 and 5, Table 1) does not translate to the same amount of pressure drop in the reactor, which shows an only 3-fold increase in apparent uptake. This is because the mole fraction of hydrogen in the gas phase decreases exponentially with decreasing pressure. For a quantitative treatment of this phenomenon see
    • The fact that the hydrogen uptake data presented here do not directly correspond to the stoichiometries of the quantitative yields as determined by GC (see Table 1) reflects the strongly non-linear response of the non-ideal hydrogen/toluene gas phase composition in the reactor headspace as a function of total pressure at the reaction temperature, which lies above the boiling point of toluene. E.g., a 6-fold increase in conversion as a function of time (entries 4 and 5, Table 1) does not translate to the same amount of pressure drop in the reactor, which shows an only 3-fold increase in apparent uptake. This is because the mole fraction of hydrogen in the gas phase decreases exponentially with decreasing pressure. For a quantitative treatment of this phenomenon see.
  • 32
    • 85034385794 scopus 로고    scopus 로고
    • 1H NMR spectra used to make the peak assignments are given in the ESI
    • 1H NMR spectra used to make the peak assignments are given in the ESI.
  • 33
    • 85034329257 scopus 로고    scopus 로고
    • When the removal of the heterogeneous catalyst was performed under Ar atmosphere, the conversion of hexyl hexanoate reached 71%
    • When the removal of the heterogeneous catalyst was performed under Ar atmosphere, the conversion of hexyl hexanoate reached 71%.
  • 35
    • 85034346933 scopus 로고    scopus 로고
    • Pressure drops refer to the initial and final pressure in the reactor at room temperature before and after the reaction, i.e., at temperatures well below the boiling points of the liquid components of the reaction mixture. In contrast to the data presented in Fig. 1, in this case the pressure drops do directly reflect the stoichiometric hydrogen uptake
    • Pressure drops refer to the initial and final pressure in the reactor at room temperature before and after the reaction, i.e., at temperatures well below the boiling points of the liquid components of the reaction mixture. In contrast to the data presented in Fig. 1, in this case the pressure drops do directly reflect the stoichiometric hydrogen uptake.

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.