DOI: 10.1016/j.jcou.2017.01.012
Scopus记录号: 2-s2.0-85012935223
论文题名: A green process for production of p-aminophenol from nitrobenzene hydrogenation in CO2/H2O: The promoting effects of CO2 and H2O
作者: Zhao L. ; Cheng H. ; Liu T. ; Li Y. ; Ying Z. ; Yang W. ; Lin W. ; Meng X. ; Wang C. ; Zhao F.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 18 语种: 英语
英文关键词: Hydrogenation
; Nitrobenzene
; p-aminophenol
; Supercritical CO2
Scopus关键词: Catalysis
; Catalysts
; Chemical shift
; Fourier transform infrared spectroscopy
; Hydrogenation
; Nitrobenzene
; Platinum
; Water gas shift
; Deep hydrogenation
; Nitrobenzene hydrogenation
; Optimal reaction condition
; p-Aminophenol
; Phenylhydroxylamines
; Reverse water-gas shift reaction
; Situ diffuse reflectance FTIR
; Supercritical CO
; Carbon dioxide
英文摘要: Graphical abstract: ScCO2-H2O was an effective and green medium for production of PAP from the hydrogenation of NB (Conv. 98.5%, Sel. 68.9%) over Pt/Al2O3 catalyst, the acidity and CO formed in situ were demonostrated to promote the formation of PAP. An efficient green process was developed for production of p-aminophenol (PAP) from hydrogenation of nitrobenzene (NB) over a traditional Pt/Al2O3 catalyst in a reaction medium of supercritical CO2 (scCO2) and H2O without any additional acid catalyst involved. The combination of scCO2 and H2O was confirmed to be effective for the production of PAP. The acidity, aroused by the in situ formed carbonic acid, increased with CO2 pressure, which acted as acid catalysis during the reaction, and it can easily self-neutralize by depressurization of CO2, resulting in a green and a intensive process for it removed the final neutralization and salts disposal of the traditional liquid acids. Under the optimal reaction conditions, a high yield to PAP (68.9%) was achieved at the high conversion of NB (98.5%). Moreover, the results of in situ diffuse reflectance FTIR spectra revealed that CO was generated by the reverse water-gas shift reaction (CO2+H2→CO+H2O), it can adsorbed on the surface of Pt/Al2O3 to suppress the undesired deep hydrogenation of N-phenylhydroxylamine (PHA) to aniline (AN), which also contributed to the obtained high selectivity of PAP. Therefore, the present green and efficient catalysis process will arouse the interest of researchers in the fields of the green and sustainable organic synthesis. © 2017 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52787
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
Recommended Citation:
Zhao L.,Cheng H.,Liu T.,et al. A green process for production of p-aminophenol from nitrobenzene hydrogenation in CO2/H2O: The promoting effects of CO2 and H2O[J]. Journal of CO2 Utilization,2017-01-01,18