Low-temperature catalytic performance for oxidative dehydrogenation of propane on nanosized Ti(Zr)–Ni–O prepared by modified sol–gel method

2006 ◽  
Vol 7 (5) ◽  
pp. 268-271 ◽  
Author(s):  
Yiming He ◽  
Ying Wu ◽  
Tong Chen ◽  
Weizheng Weng ◽  
Huilin Wan
Keyword(s):  
Low Temperature ◽  
Oxidative Dehydrogenation ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Oxidative Dehydrogenation Of Propane ◽  
Gel Method ◽  
Sol Gel Method

LOW-TEMPERATURE CATALYTIC PERFORMANCE OF NANOSTRUCTURED Ti–Ni–O PREPARED BY MODIFIED SOL-GEL METHOD

2007 ◽  
Vol 14 (04) ◽  
pp. 611-615 ◽  
Author(s):  
YING WU ◽  
TINGHUA WU ◽  
YIMING HE ◽  
WEIZHENG WENG ◽  
HUILIN WAN
Keyword(s):  
Low Temperature ◽  
Oxidative Dehydrogenation ◽  
Strong Interaction ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Catalyst Characterization ◽  
Oxygen Desorption ◽  
Gel Method ◽  
Sol Gel Method ◽  
Dehydrogenation Reactions

Nanosized Ti – Ni – O catalysts prepared by a modified sol–gel method had been investigated in the oxidative dehydrogenation of ethane and propane to the corresponding alkene. The best yield is obtained over the 9.1 wt% Ti – Ni – O catalyst. The results of catalyst characterization indicated that there is strong interaction between TiO 2 and NiO . It is observed that a decline in temperature for low-temperature oxygen desorption and an augmentation in reduction difficulty of the catalysts would result in poor activity and enhanced alkene selectivity, respectively, over the Ti – Ni – O catalysts in the oxidative dehydrogenation reactions.

scholarly journals Mixed Metal Oxides of M1 MoVNbTeOx and TiO2 as Composite Catalyst for Oxidative Dehydrogenation of Ethane

Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 71
Author(s):  
Yuxin Chen ◽  
Dan Dang ◽  
Binhang Yan ◽  
Yi Cheng
Keyword(s):  
Metal Oxides ◽  
Oxidative Dehydrogenation ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Mixed Metal Oxides ◽  
Gel Method ◽  
Mixed Metal ◽  
Sol Gel Method ◽  
Composite Catalysts ◽  
Oxidative Dehydrogenation Of Ethane

Composite catalysts of mixed metal oxides were prepared by mixing a phase-pure M1 MoVNbTeOx with anatase-phase TiO2. Two methods were used to prepare the composite catalysts (the simple physically mixed or sol-gel method) for the improvement of the catalytic performance in the oxidative dehydrogenation of ethane (ODHE) process. The results showed that TiO2 particles with a smaller particle size were well dispersed on the M1 surface for the sol-gel method, which presented an excellent activity for ODHE. At the same operating condition (i.e., the contact time of 7.55 gcat·h/molC2H6 and the reaction temperature of 400 °C), the M1-TiO2-SM and M1-TiO2-PM achieved the space time yields of 0.67 and 0.52 kgC2H4/kgcat/h, respectively, which were about ~76% and ~35% more than that of M1 catalyst (0.38 kgC2H4/kgcat/h), respectively. The BET, ICP, XRD, TEM, SEM, H2-TPR, C2H6-TPSR, and XPS techniques were applied to characterize the catalysts. It was noted that the introduction of TiO2 raised the V5+ abundance on the catalyst surface as well as the reactivity of active oxygen species, which made contribution to the promotion of the catalytic performance. The surface morphology and crystal structure of used catalysts of either M1-TiO2-SM or M1-TiO2-PM remained stable as each fresh catalyst after 24 h time-on-stream tests.

Synthesis of Aluminum Titanate Powder at Low Temperature via Nonhydrolytic Sol-Gel Method by Using Aluminum Powder

2013 ◽  
Vol 745-746 ◽  
pp. 673-678 ◽  
Author(s):  
Wei Hui Jiang ◽  
Zhi Fang Xu ◽  
Jian Min Liu ◽  
Qing Xia Zhu ◽  
Quan Zhang
Keyword(s):  
Low Temperature ◽  
Aluminum Powder ◽  
Raw Materials ◽  
Sol Gel ◽  
Aluminum Titanate ◽  
Gel Method ◽  
Sol Gel Method ◽  
Transmission Electron ◽  
Oxygen Donor ◽  
Metal Aluminum

Aluminum titanate (Al2TiO5) powder has been synthesized at low temperature via nonhydrolytic sol-gel method by using aluminum powder as aluminum source, titanium tetrachloride as titanium source, anhydrous ethanol as oxygen donor with different catalysts. The phase transformation of aluminum titanate xerogel powder during heat treatment and the influence of the mixing orders of raw materials, catalyst kinds on the synthesis of aluminum titanate were investigated by means of differential-thermal analysis (DTA-TG), X-ray diffraction (XRD), transmission electron microscope (TEM). The results indicated that aluminum titanate powder was easily synthesized at 750 °C by using AlCl3 as catalyst with a mixing order of adding TiCl4 before AlCl3 into aluminum alcohol mixture. The catalytic order of the different catalysts in the preparation process of aluminum titanate is: FeCl3> AlCl3> MgCl2. The catalyst promoted the activation of metal aluminum powder and played a major role in the synthesis of aluminum titanate powder at low temperature via nonhydrolytic sol-gel method.

Synthesis of CdS nanoparticle by sol-gel method as low temperature NO2 sensor

2020 ◽  
Vol 239 ◽  
pp. 121975 ◽  
Author(s):  
Rakesh K. Sonker ◽  
B.C. Yadav ◽  
Vinay Gupta ◽  
Monika Tomar
Keyword(s):  
Low Temperature ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Cds Nanoparticle ◽  
No2 Sensor

Iron-Zircon Pigments Prepared by Non-Hydrolytic Sol-Gel Method at Low Temperature

2011 ◽  
Vol 412 ◽  
pp. 223-226 ◽  
Author(s):  
Wei Hui Jiang ◽  
Yan Hui Yang ◽  
Qing Xia Zhu ◽  
Jian Min Liu
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Ferric Chloride ◽  
Lithium Fluoride ◽  
Sol Gel ◽  
Zircon Crystal ◽  
Molar Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Anhydrous Ferric Chloride

ron-zircon pigment has been synthesized by non-hydrolytic sol-gel method using zirconium chloride and tetraethoxysilane as precursors, anhydrous ferric chloride as colorant, lithium fluoride as mineralizer and anhydrous ethanol as solvent. Iron-zircon pigment has been characterized by means of DTA-TG, XRD, Colorimeter and TEM. The results show that only a small fraction of iron is incorporated in the zircon crystal structure while the remaining iron cations are trapped within the zircon matrix. The iron-zircon with the red value (a*) of 20.64 can be synthesized at 700°C with the optimum Fe/Zr molar ratio of 0.2.

Low-temperature processing and characterization of single-phase PZT powders by sol-gel method

2007 ◽  
Vol 42 (23) ◽  
pp. 9801-9806 ◽  
Author(s):  
Radhouane Bel Hadj Tahar ◽  
Noureddine Bel Hadj Tahar ◽  
Abdelhamid Ben Salah
Keyword(s):  
Low Temperature ◽  
Single Phase ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method ◽  
Low Temperature Processing
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