Hydrogenation of furfural to furfuryl alcohol over efficient sol-gel nickel-copper/zirconia catalyst

2020 ◽  
Vol 132 (1) ◽  
Author(s):  
Merve Ece Şebin ◽  
Solmaz Akmaz ◽  
Serkan Naci Koc
Keyword(s):  
Furfuryl Alcohol ◽  
Sol Gel ◽  
Nickel Copper ◽  
Zirconia Catalyst

Structural, morphological and magnetic properties of Mn2+ ions substituted nanosized nickel–copper–cobalt ferrites through sol–gel auto-combustion method

2019 ◽  
Vol 34 (01) ◽  
pp. 2050002
Author(s):  
Wei Zhang ◽  
Aimin Sun ◽  
Xiqian Zhao ◽  
Xiaoguang Pan ◽  
Yingqiang Han
Keyword(s):  
Magnetic Properties ◽  
Saturation Magnetization ◽  
Spinel Structure ◽  
Remanent Magnetization ◽  
Cobalt Ferrite ◽  
Sol Gel ◽  
Combustion Method ◽  
Magnetic Data ◽  
Nickel Copper ◽  
Auto Combustion

Manganese substituted nickel–copper–cobalt ferrite nanoparticles having the basic composition [Formula: see text] (x = 0.0, 0.1, 0.2, 0.3 and 0.4) were synthesized by sol–gel auto-combustion method. X-ray diffraction (XRD) was used to estimate phase purity and lattice symmetry. All the prepared samples show the single-phase cubic spinel structure. Fourier transform infrared (FTIR) measurements also confirm the cubic spinel structure of the ferrite that is formed. The preparation of samples show these nearly spherical particles by Transmission electron microscopy (TEM). The magnetic properties of Mn[Formula: see text] ion substituted in nickel–copper–cobalt ferrite were studied by Vibrating sample magnetometer (VSM). The saturation magnetization ([Formula: see text]), remanent magnetization [Formula: see text], coercivity [Formula: see text], magnetic moment [Formula: see text] and anisotropy constant [Formula: see text] first increase and then decrease with the increase of [Formula: see text] ions content. They had better magnetism than pure sample and other substituted samples when the substitution amount of [Formula: see text] ions was [Formula: see text]. At [Formula: see text], the maximum values of remanent magnetization [Formula: see text], saturation magnetization [Formula: see text] and coercivity [Formula: see text] are 25.58 emu/g, 61.95 emu/g and 689.76 Oe, respectively. This indicates that the magnetism of ferrite can improve by substituting with the appropriate amount of manganese. However, due to the excess [Formula: see text] ions instead, ferrite magnetism is weakened. This means that these materials can be used in magnetic data storage and recording media.

scholarly journals Efficient synthesis of butyl levulinate from furfuryl alcohol over ordered mesoporous Ti-KIT-6 catalysts for green chemistry applications

RSC Advances ◽  
2017 ◽  
Vol 7 (87) ◽  
pp. 55206-55214 ◽  
Author(s):  
Jimmy Nelson Appaturi ◽  
Mohd Rafie Johan ◽  
R. Jothi Ramalingam ◽  
Hamad A. Al-Lohedan ◽  
J. Judith Vijaya
Keyword(s):  
Green Chemistry ◽  
Molecular Sieve ◽  
Furfuryl Alcohol ◽  
Sol Gel ◽  
Efficient Synthesis ◽  
Ordered Mesoporous ◽  
Gel Treatment

Here we describe the synthesis of butyl levulinate by alcoholysis of furfuryl alcohol with n-butanol over a series of titanium incorporated mesoporous KIT-6 molecular sieve catalysts prepared by a simple sol–gel treatment.

Furfural Hydrogenation to Furfuryl Alcohol over Bimetallic Ni–Cu Sol–Gel Catalyst: A Model Reaction for Conversion of Oxygenates in Pyrolysis Liquids

2016 ◽  
Vol 59 (15-16) ◽  
pp. 1413-1423 ◽  
Author(s):  
S. A. Khromova ◽  
M. V. Bykova ◽  
O. A. Bulavchenko ◽  
D. Yu. Ermakov ◽  
A. A. Saraev ◽  
...  
Keyword(s):  
Furfuryl Alcohol ◽  
Sol Gel ◽  
Model Reaction ◽  
Furfural Hydrogenation ◽  
Pyrolysis Liquids

Nanoferrites of Transition Metals and their Catalytic Activity

2015 ◽  
Vol 241 ◽  
pp. 126-138 ◽  
Author(s):  
J.K. Sharma ◽  
Pratibha Srivastava ◽  
Gurdip Singh ◽  
Hardev Singh Virk
Keyword(s):  
Catalytic Activity ◽  
Sol Gel ◽  
Cobalt Nickel ◽  
Nickel Copper ◽  
Temperature Decomposition ◽  
Auto Combustion ◽  
Composite Solid Propellant ◽  
Burning Rates ◽  
Copper Zinc ◽  
Co Precipitation

Recent applications of transition metal nanoferrites as catalyst in thermal decomposition of ammonium perchlorate (AP) and combustion of composite solid propellant (CSP), have been reviewed. Catalytic applications include the use of mainly cobalt, nickel, copper, zinc, manganese, cadmium nanoferrites, as well as their mixed-metal combinations. The nanoferrites are obtained mainly by wet-chemical, sol-gel, solvo-thermal, auto-combustion and co-precipitation methods. Addition of nanoferrites to AP led to shifting of the high temperature decomposition peak toward lower temperatures which shows their catalytic activity. The burning rates of CSPs have also been enhanced by these nanoferrites. Contents of Paper

scholarly journals SYNTHESIS, STRUCTURE AND PROPERTIES OF ORGANIC GELS BASED ON LARCH BARK TANNINS AND HY-DROLYSIS LIGNIN

2021 ◽  
pp. 109-122
Author(s):  
Nadezhda Mikhailovna Mikova ◽  
Elena Valentinovna Mazurova ◽  
Ivan Petrovich Ivanov ◽  
Boris Nikolayevich Kuznetsov
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Furfuryl Alcohol ◽  
Lignin Content ◽  
Sol Gel ◽  
Chemical Properties ◽  
Hydrolysis Lignin ◽  
Physico Chemical ◽  
Gel Composition

For the first time, tannin-lignin-formaldehyde and tannin-lignin-furfuryl organic gels were obtained on the basis of larch bark tannins and hydrolysis lignin by sol-gel condensation with formaldehyde and furfuryl alcohol. Their physico-chemical properties were studied by varying the content of lignin (from 5 to 30 wt%) and a fixed mass ratio of polyphenolic substances to the crosslinking reagent (1 : 1.5). With an increase in the lignin content the density of tannin-lignin formaldehyde gels decreases from 0.83 to 0.53 g/ cm3, and that of tannin-lignin-furfuryl gels is from 0.32 to 0.14 g / cm3. According to the FTIR data, the structures of tannin-lignin-formaldehyde and tannin-lignin-furfuryl gels are formed by aromatic fragments cross-linked with methylene and methylene-ether bridges. Scanning electron microscopy shows that the addition of appropriate amounts of lignin to tannins (up to 10 wt% when using formaldehyde and up to 20 wt% when using furfuryl alcohol) promotes the formation of gels with a more developed porous structure. In the case of tannin-lignin-formaldehyde gel, the specific surface area and sorption of methylene blue are 12 m2 / g and 43 mg / g and for tannin-lignin-furfuryl gel – 72 m2 / g and 114.5 mg/g, respectively. It was found that an increase in the lignin content in the gel composition over 20 wt.% is accompanied by the phase localization of lignin (precipitation), which reduces the strength of the resulting gel and reduces its specific surface area.

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