Synthesis of TS-1 using amorphous SiO2 and its catalytic properties for hydroxylation of phenol in fixed-bed reactor

Pure CeO2and a series of (x %) K-CeO2(x=1, 2, 3, 4) catalysts were respectively prepared by the precipitation and incipient wetness impregnation methods, and characterized by means of XRD, BET and H2-TPR techniques. The catalytic activity was investigated by the gas-solid reaction with methane in the absence of gaseous oxidant in a fixed bed reactor at 800 °C. The XRD measurement showed that doping of K2CO3did not change the structure of CeO2with the addition of K2CO3 without formation of Ce-K-O solid solution in these materials. Surface area of catalysts wasSubscript textdecreased with the impregnation amount of K2CO3. Reducibility of catalysts was obviously enhanced by the addition of K2CO3as shown in H2-TPR tests. The catalysts activity tests indicated that adding K2CO3to CeO2could promote the oxygen storage capacity of catalysts. K species in CeO2could affect the CO formation in methane oxidation.

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Deactivation and regeneration of TS-1/diatomite catalyst for hydroxylation of phenol in fixed-bed reactor

Chemical Engineering Journal ◽

10.1016/j.cej.2005.01.011 ◽

2005 ◽

Vol 108 (3) ◽

pp. 187-192 ◽

Cited By ~ 29

Author(s):

Hong Liu ◽

Guanzhong Lu ◽

Yanglong Guo ◽

Yun Guo ◽

Junsong Wang

Keyword(s):

Fixed Bed ◽

Fixed Bed Reactor ◽

Hydroxylation Of Phenol

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An Au–Cu bimetal catalyst for acetylene hydrochlorination with renewable γ-Al2O3 as the support

RSC Advances ◽

10.1039/c4ra13648a ◽

2015 ◽

Vol 5 (22) ◽

pp. 16727-16734 ◽

Cited By ~ 28

Author(s):

Jigang Zhao ◽

Junjian Zeng ◽

Xiaoguang Cheng ◽

Lei Wang ◽

Henghua Yang ◽

...

Keyword(s):

Catalytic Properties ◽

Fixed Bed ◽

Aluminium Oxide ◽

Fixed Bed Reactor ◽

Acetylene Hydrochlorination ◽

Bimetal Catalyst

The bimetal catalyst gold(iii) chloride–copper(ii) chloride (AuCl3–CuCl2) was prepared with different gamma-aluminium oxide (γ-Al2O3) supports and its catalytic properties towards acetylene hydrochlorination were assessed in a fixed-bed reactor.

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Chemical kinetics of hydroxylation of phenol catalyzed by TS-1/diatomite in fixed-bed reactor

Chemical Engineering Journal ◽

10.1016/j.cej.2005.12.001 ◽

2006 ◽

Vol 116 (3) ◽

pp. 179-186 ◽

Cited By ~ 31

Author(s):

Hong Liu ◽

Guanzhong Lu ◽

Yanglong Guo ◽

Yun Guo ◽

Junsong Wang

Keyword(s):

Chemical Kinetics ◽

Fixed Bed ◽

Fixed Bed Reactor ◽

Hydroxylation Of Phenol ◽

Kinetics Of

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Effect of pretreatment on properties of TS-1/diatomite catalyst for hydroxylation of phenol by H2O2 in fixed-bed reactor

Catalysis Today ◽

10.1016/j.cattod.2004.06.083 ◽

2004 ◽

Vol 93-95 ◽

pp. 353-357 ◽

Cited By ~ 8

Author(s):

Hong Liu ◽

Guanzhong Lu ◽

Yanglong Guo ◽

Yun Guo ◽

Junsong Wang

Keyword(s):

Fixed Bed ◽

Fixed Bed Reactor ◽

Hydroxylation Of Phenol

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Production of Hydrogen-Rich Gas by Oxidative Steam Reforming of Dimethoxymethane over CuO-CeO2/γ-Al2O3 Catalyst

Energies ◽

10.3390/en13143684 ◽

2020 ◽

Vol 13 (14) ◽

pp. 3684

Author(s):

Sukhe Badmaev ◽

Vladimir Sobyanin

Keyword(s):

Fuel Cell ◽

Partial Oxidation ◽

Steam Reforming ◽

Comparative Studies ◽

Catalytic Properties ◽

Fixed Bed ◽

Space Velocity ◽

Fixed Bed Reactor ◽

Production Of Hydrogen ◽

Al2o3 Catalyst

The catalytic properties of CuO-CeO2 supported on alumina for the oxidative steam reforming (OSR) of dimethoxymethane (DMM) to hydrogen-rich gas in a tubular fixed bed reactor were studied. The CuO-CeO2/γ-Al2O3 catalyst provided complete DMM conversion and hydrogen productivity > 10 L h−1 gcat−1 at 280 °C, GHSV (gas hourly space velocity) = 15,000 h−1 and DMM:O2:H2O:N2 = 10:2.5:40:47.5 vol.%. Comparative studies showed that DMM OSR exceeded DMM steam reforming (SR) and DMM partial oxidation (PO) in terms of hydrogen productivity. Thus, the outcomes of lab-scale catalytic experiments show high promise of DMM oxidative steam reforming to produce hydrogen-rich gas for fuel cell feeding.

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Synthetic Technics of Methyl Acrylate through Aldol Condensation with a Multisubsection Fixed-Bed Reactor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.2859 ◽

2011 ◽

Vol 233-235 ◽

pp. 2859-2862 ◽

Cited By ~ 3

Author(s):

Tao Jing ◽

Jing Zhi Tian ◽

De Zhi Sun

Keyword(s):

Methyl Acrylate ◽

Conversion Rate ◽

Methyl Acetate ◽

Catalytic Properties ◽

Aldol Condensation ◽

Condensation Reaction ◽

Fixed Bed ◽

Space Velocity ◽

Fixed Bed Reactor ◽

Ester Yield

Two types of catalysts, V2O5-P2O5/SiO2and Cs-Sb2O5/SiO2, were separately prepared with SiO2as carrier. Their catalytic properties were investigated in the process of synthesizing methyl acrylate through aldol condensation with methylal and methyl acetate, and the influence of the catalyst’s filling up technique on the reaction was studied. Reactions were performed in a fixed-bed reactor. The research results indicate that aldol condensation reaction is effectively promoted when the two catalysts were filled up in appropriate subsections of the reaction tube. Specifically, when V-Si-P Oxide was filled up at the 4thsubsection and Cs-Sb2O5/SiO2catalyst at the 6thsubsection with the temperature of the reactor at 400 °C and the mol ratio of methyl acetate and methylal at 1.6:1 and the space velocity at 3.2 h-1, then the conversion rate of methylal was 50.9%, the selectivity of methyl acrylate was 90.63%, and the ester yield of methyl acrylate was 46.15%.

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Perengkahan n-Butana Menggunakan Katalis Nanopartikel Zeolit Alam Klaten

Jurnal Rekayasa Kimia & Lingkungan ◽

10.23955/rkl.v13i2.12059 ◽

2018 ◽

Vol 13 (2) ◽

pp. 182-188

Author(s):

Teguh Kurniawan ◽

Oki Muraza

Keyword(s):

Catalytic Properties ◽

Fixed Bed ◽

Textural Properties ◽

High Energy ◽

Fixed Bed Reactor ◽

X Ray Diffraction ◽

X Ray ◽

New Process ◽

Increasing Demand ◽

High Energy Consumption

Increasing demand on olefins, high energy consumption of thermal cracking and oil depletion are the driving force to find new process to produce olefins. Catalytic cracking of n-butane is promising route to produce olefins. In this paper, we synthesized nanoparticle from natural zeolites by ball milling-recrystallization method and studied the effect of acid dealumination over the nanozeolites on the catalytic properties. Particle size was evaluated visually by using scanning electron microscope. X-Ray Diffraction analysis was performed to study zeolites phase and its crystallinity. Acid dealumination effect over nanosized mordenite on the acidity were evaluated by ammonia TPD and pyridine FTIR. Textural properties of zeolites were characterized by nitrogen physisorption at -196 oC. The catalysts were tested in a fixed bed reactor for n-butane cracking to olefins product. Various temperature conditions were applied ranging from 350 oC to 650 oC for n-butane cracking in a fixed bed reactor. Conversions of n-butane were 15% and 90% at 350 oC and 650 oC, respectively. Selectivity to olefins was increase from 1% at 350 oC to 47% at 650 oC.

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Nanosized Ni/SBA-15 Catalysts for CO2 Reforming of CH4

Applied Sciences ◽

10.3390/app9091926 ◽

2019 ◽

Vol 9 (9) ◽

pp. 1926 ◽

Cited By ~ 2

Author(s):

Ahmed A. Ibrahim ◽

Ashraf Amin ◽

Ahmed S. Al-Fatesh ◽

Nadavala Siva Kumar ◽

Samsudeen Olajide Kasim ◽

...

Keyword(s):

Bimetallic Catalysts ◽

Catalytic Properties ◽

Fixed Bed ◽

Catalytic Performance ◽

Dry Reforming ◽

Fixed Bed Reactor ◽

Co2 Reforming ◽

Methane Dry Reforming ◽

Remarkable Effect ◽

Co2 Reforming Of Ch4

Ni, Co, and Co–Ni bimetallic catalysts supported over SBA-15 and over SBA-15 doped with Zn or Ce oxides were prepared and tested in a methane dry reforming reaction. The loading of the metals in the catalyst was 5 wt % for either mono or bimetallic catalysts. The prepared catalysts were tested in a continuous-flow fixed-bed reactor at 800 °C under atmospheric pressure. XRD, TPR, TPD, and SEM characterization techniques were employed to investigate the catalytic properties of fresh catalysts. SEM and TGA were used to study the catalytic properties of spent catalysts. A remarkable effect on the reduction properties and catalytic performance of catalysts was observed after adding Zn and Ce. Over an 8 h test, Ni/SBA-15 showed the best activity and stability. The conversion was 90% for CH4 and CO2. Co–Ni/SBA-15 and Co–Ni/Ce–SBA-15 have shown a reasonable activity and stability. Selectivity of the Ni/SBA-15 catalyst was higher than all other catalysts as indicated by the H2/CO ratio. Co/SBA-15 and Co–Ni/Zn–SBA-15 showed a low activity and selectivity. TPD–NH3 profiles indicated that doping SBA-15 with Ce and/or Zn increased the catalyst acidic sites. Ni/SBA-15 is an excellent potential catalyst for commercial methane dry reforming processes.

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