Preparation of Ni/SiO2 catalyst in ionic liquids for hydrogenation

Abstract

A series of silica supported nickel catalysts were prepared from nickel nitrate and tetraethyl orthosilicate by the sol-gel method with the imidazolium type ionic liquids as solvents. The catalysts were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Their catalytic performances for the selective hydrogenation of cinnamaldehyde to hydrocinnamaldehyde were investigated. The results show that the Ni/ SiO 2 catalyst prepared with 1-(2-hydroxyethyl)-3-methylimidazole tetrafluoroborate ionic liquid as solvent exhibits the highest catalytic activity for the reaction. Under the optimal conditions of catalyst dosage (based on the mass of cinnamaldehyde used) 10%, reaction pressure 2 MPa, temperature 373 K and reaction time 2 h, the conversion of cinnamaldehyde and the selectivity to hydrocinnamaldehyde can reach 97.6% and 98.8%, respectively.

Precipitation of Nickel-Containing Particles From Nickel Nitrate Solutions Under the Action of a Direct Current Glow Discharge

“…Ультрадисперсные частицы оксида никеля обладают рядом уникальных свойств. Это позволяет использовать его в производстве солнечных батарей [1], сенсоров для контроля содержания сероводорода и метана в атмосфере [2,3], а также биосенсоров ацетилхолина [4] и глюкозы [5], электрохромных устройств [6], керметных электродов для высокотемпературных электрохимических устройств [7], анодов для Li-ионных батарей [8], суперконденсаторов [9], магнитных наноматериалов [10,11], катализаторов нефтехимии (в процессах обессеривания, дехлорирования, синтезе Фишера-Тропша, в частности, для получения спиртов, парового риформинга метана) [12][13][14][15][16], адсорбентов тяжелых металлов [17], в процессе электрохимического разложения воды [18], для получения антиферромагнитных покрытий и полупроводниковых слоев р-типа [19].…”

Synthesis of Hydrocinnamaldehyde via Vapor Phase Dehydrogenation of Hydrocinnamyl alcohol over Rice‐Derived MgO‐Supported Copper Catalysts

“…Ni/C showed better performance in the liquid phase. Among all reported Ni based catalysts, 10% Ni/SiO 2 catalyst showed better activity with almost complete conversion of CAL and high selectivity of HCAL (99%) in ethanol solvent at 373 K, under high pressure condition of hydrogen . Pt−Ni/CATs catalyst showed a significant activity and selectivity towards HCAL due to the electronic synergetic effect of Pt‐Ni−B .…”

Study on extraction of thiophene from model gasoline with brønsted acidic ionic liquids

“…Recently, more attention has been paid to ILs owing to their unique chemical and physical properties compared with conventional organic solvents, such as having negligible vapor pressure, high chemical and thermal stabilities, and excellent solubility [7]. ILs have been used as "green solvents" in a range of fundamental research and applications, including catalysis [8,9], synthesis [10,11], and separations [12,13]. Since 2001, Bösmann [14] reported the extractive desulfurization of diesel oil using a series of ILs for the first time; the extractive desulfurization process employing ILs has been extensively investigated [15][16][17][18][19][20][21].…”