Faculty Profiles - NAGAOKA Katsutoshi

Papers - NAGAOKA Katsutoshi

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Oxidative reforming of n-butane triggered by spontaneous oxidation of CeO2-x at ambient temperature Reviewed

Katsutoshi Nagaoka, Katsutoshi Sato, Sho Fukuda, Shota Nakashiki, Hiroyasu Nishiguchi, Johannes A. Lercher, Yusaku Takita

CHEMISTRY OF MATERIALS Vol. 20 ( 13 ) page： 4176 - 4178 2008.7

Anaerobic oxidation of isobutane: Catalytic properties of MgV2O6 and Mg2V2O7 prepared by the molten method Reviewed

Yusaku Takita, Susumu Hikazudani, Kazuya Soda, Katsutoshi Nagaoka

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL Vol. 280 ( 1-2 ) page： 164 - 172 2008.2

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

The catalytic activity of MV2O6 and M2V2O7 type oxides prepared by the molten method (MM) for anaerobic oxidation of isobutane was studied in order to construct a system for the selective oxidation of isobutene using a thin layer reactor. Isobutene, CO and CO2 were formed by every catalyst tested. The activities for isobutene formation were CuV2O6 > ZnV2O6, NiV2O6, CoV2O6 > MgV2O6 > MnV2O6 >> CaV2O6. Isobutene was a major product over M2V2O7 (MM). Co2V2O7 showed the highest activity and high isobutene selectivity exceeded 90%, demonstrating that CO2V2O7 is a suitable oxide for a thin layer reactor for anaerobic oxidation of isobutane. Partial substitution of Mg by Cu in Mg2V2O7 (MM) improved the activity. It is shown by the oxidation at low O-2 concentration as 2-3% that two types of oxidations occurred simultaneously: isobutene formation by the lattice oxygen ions diffused from the bulk, and CO and CO2 formation by the oxygen species derived from molecular oxygen in the gas phase. (C) 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.molcata.2007.09.028

Other Link： http://orcid.org/0000-0003-1774-1537

Synthesis of mesoporous, nanocrystalline lanthanum phosphate in the presence of citric acid and stearic acid Reviewed

Ho Li-Ngee, Nishiguchi Hiroyasu, Nagaoka Katsutoshi, Takita Yusaku

JOURNAL OF RARE EARTHS Vol. 25 ( 6 ) page： 684 - 691 2007.12

Highly active Ni/MgO in oxidative steam pre-reforming of n-butane for fuel cell application Reviewed

Katsutoshi Nagaoka, Katsutoshi Sato, Hiroyasu Nishiguchl, Yusaku Takita

CATALYSIS COMMUNICATIONS Vol. 8 ( 11 ) page： 1807 - 1810 2007.11

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Oxidative steam reforming of n-butane over supported Ni catalysts at relatively low temperature, 723 K, is reported. Among all the supported 20 wt% Ni catalysts studied, only Ni/MgO was able to convert n-butane directly after 02 oxidation. Additionally, when the Ni/MgO was prepared from an aqueous Ni(NO3)(2) Solution with pH 7, H-2 formation rate of Ni/MgO (pH 7) at a high SV (1660 l(h center dot g)(-1)) was 2.3 times as high as that of conventional Ni/MgO. The higher activity of Ni/MgO (pH 7) was ascribed to stronger resistance against oxidation of Ni-0 due to the formation of relatively large Ni-0 particles. (c) 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.catcom.2007.02.013

Other Link： http://orcid.org/0000-0003-1774-1537

The Pr promotion effect on oxygen storage capacity of Ce-Pr oxides studied using a TAP reactor Reviewed

Zhaoxia Song, Wei Liu, Hiroyasu Nishiguchi, Akihide Takami, Katsutoshi Nagaoka, Yusaku Takita

APPLIED CATALYSIS A-GENERAL Vol. 329 page： 86 - 92 2007.10

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

The oxygen storage capacity including OSC, OSCC and dynamic OSC was measured for Ce-Pr oxides using a temporal analysis of products (TAP) reactor system. The exact features of reduction and re-oxidation were obtained by accurately measuring the uptake of CO and O, and the production of CO2. It was found that the reduction temperature of Ce-Pr oxides was lowered 50-100 degrees C in comparison to that of CeO2. The substitution of cerium by praseodymium in the Ce1-xPrxO2-delta oxides enhanced both OSC and OSCC. However, OSCC was much influenced by the increase of praseodymium content more than OSC. It was interpreted that the addition of Pr significantly increased the amount of oxygen migrating from bulk to surface while the migration rate of bulk oxygen was slightly accelerated. On the basis of analyses of the Cc 3d, Pr 3d and O 1s X-ray photoelectron spectra, the promotion effect of Pr on oxygen storage capacity could be attributed to the CC4+/Ce3+, Pr4+/Pr3+ redox behaviour and the enrichment of oxygen vacancies in Ce1-xPrxO2-delta. (c) 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.apcata.2007.06.023

Other Link： http://orcid.org/0000-0003-1774-1537

Influence of support on catalytic behavior of nickel catalysts in oxidative steam prereforming of n-butane for fuel cell applications Reviewed

Katsutoshi Nagaoka, Katsutoshi Sato, Hiroyasu Nishiguchi, Yusaku Takita

APPLIED CATALYSIS A-GENERAL Vol. 327 ( 2 ) page： 139 - 146 2007.8

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Oxidative steam reforming of n-butane over supported Ni catalysts at relatively low temperature, 723 K, is reported. Catalytic performance was investigated not only after H, treatment at 1073 K "reductive treatment" but also after subsequent O-2/Ar treatment at the reaction temperature "oxidative treatment" to mimic the shutdown and startup of the domestic fuel cell system. After the reductive treatment, n-butane conversion attained 100%, for all the catalyst at a lower space velocity (SV) of 67 L(h g)(-1). Differences in catalytic activity were emphasized at a higher SV of 667 L(h a)(-1), and were attributed to corresponding differences in metal surface area. Since a fraction of Ni in some catalysts was oxidized during the reaction at the higher SV, the reaction at the higher SV was indicated to be kinetically more oxidative condition. Although Ni/Al2O3 was inactive at the lower SV after the oxidative treatment, n-butane conversion of the other catalysts attained 100%. In contrast, only Ni/MgO was able to convert n-butane at the higher SV after the oxidative treatment. Therefore it was revealed that nickel oxide species on the catalyst were reduced by n-butane in the reactant even under severe oxidative conditions. C) 2007 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.apcata.2007.05.004

Other Link： http://orcid.org/0000-0003-1774-1537

Promotion mechanism of co-existing NaCl in the synthesis of CaCO3 Reviewed

Yusaku Takita, Mayumi Eto, Hisao Sugihara, Katsutoshi Nagaoka

MATERIALS LETTERS Vol. 61 ( 14-15 ) page： 3083 - 3085 2007.6

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

When NaCl is added in the formation of CaCO3 from CaCl2 and Na2CO3 solutions, large CaCO3 structures with complex, overlapping plates-like shapes of high calcite composition were obtained. The addition of NaCl increased the solubility of CaCO3, which promotes the transformation of vaterite to calcite and the resulting high concentration of CaCO3 promotes crystal growth rather than nucleation. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.matlet.2006.11.005

Other Link： http://orcid.org/0000-0003-1774-1537

Synthesis of Ni3C nano-whisker from NiSO4 and sucrose by means of spray pyrolysis Reviewed

Takeshi Kashiwagi, Naohisa Suzuki, Masashi Niina, Hiroyasu Nishiguchi, Katsutoshi Nagaoka, Yusaku Takita

CHEMISTRY LETTERS Vol. 36 ( 4 ) page： 512 - 513 2007.4

Language：English Publishing type：Research paper (scientific journal) Publisher：CHEMICAL SOC JAPAN

Ni particles and Ni3C whiskers with a novel morphology, grew on the Ni-carbon composite by heat treatment at 1073 K in Ar. Ni-carbon composites were prepared by spray pyrolysis of a solution of sucrose and NiSO4 in Ar at 1073 K.

DOI： 10.1246/cl.2007.512

Other Link： http://orcid.org/0000-0003-1774-1537

Influence of calcination procedure on the catalytic property of sulfated zirconia Reviewed

Xuebing Li, Katsutoshi Nagaoka, Laurent J. Simon, Roberta Olindo, Johannes A. Lercher

CATALYSIS LETTERS Vol. 113 ( 1-2 ) page： 34 - 40 2007.1

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER

Calcination parameters, such as atmosphere, duration and catalyst bed depth have a marked influence on the catalytic and spectroscopic properties of sulfated zirconia. Sulfated zirconia calcined in nitrogen or synthetic airflow, in deep bed, exhibited comparable activity in n-butane isomerization at 373 K, which suggests that oxygen is not necessary for formation of active sites. Catalysts calcined in shallow bed are catalytically inactive. Thus, the bed depth is concluded to be crucial for the formation of active sites. The samples calcined in shallow bed possessed lower sulfate content and the S=O stretching vibration was located at lower frequency. Calcination in the presence of water vapor also led to lower catalytic activity, sulfate content, and BET area. Extended calcination reduced gradually the activity and the sulfate content, which underlines the labile property of the active sites. A new interpretation of the function of the calcination step is proposed and compared with models described in the literature.

DOI： 10.1007/s10562-006-9005-5

Other Link： http://orcid.org/0000-0003-1774-1537

Redox properties of CeO2 and Pt-Rh/CeO2 studied by TAP method Reviewed

Zhaoxia Song, Hiroyasu Nishiguchi, Wei Liu, Hiroshi Yamada, Akihide Takami, Kumiko Kudo, Katsutoshi Nagaoka, Yusaku Takita

CATALYSIS LETTERS Vol. 111 ( 3-4 ) page： 169 - 171 2006.11

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER

Redox properties of CeO2 and Pt-Rh/CeO2 were studied by temporal analysis of products (TAP) method using alternative pulses of CO and O-2. A portion of pulsed CO was oxidized to CO2 and a portion of CO was adsorbed on the surface. Pulsing O-18(2) onto the catalyst which has surface species derived from CO, evolved CO2 contained no O-18 suggesting that the surface species will be carbonate ions.

DOI： 10.1007/s10562-006-0142-7

Other Link： http://orcid.org/0000-0003-1774-1537

Synthesis and characterization of a series of mesoporous nanocrystalline lanthanides phosphate Reviewed

Li-Ngee Ho, Hiroyasu Nishiguchi, Katsutoshi Nagaoka, Yusaku Takita

JOURNAL OF POROUS MATERIALS Vol. 13 ( 3-4 ) page： 237 - 244 2006.10

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER

A series of lanthanide (LA) phosphate were prepared by using N-(2-hydroxyethyl) ethylenediane-N,N',Ntriacetic acid (H(3)hedtra) as a chelating agent. The obtained samples were characterized by using X-ray diffraction (XRD), nitrogen adsorption-desorption isotherm, thermal analysis (TG-DTA), transmission electron microscope (TEM) and TPD-ammonia desorption. The results showed that samples prepared through chelating agent route possessed smaller particle size which led to higher specific surface area with increased acidic sites compared with the reference samples prepared free of H(3)hedtra. It was also found that the acidic strength increased gradually from the light lanthanide phosphate to heavy lanthanide phosphate. Besides, pore size of the samples could be controlled by altering the mole ratio of the lanthanide(LA): H(3)hedtra. Pore size distribution of the samples became narrower through synthesis in the presence of H3hedtra. The precursor sol complex was investigated by FTIR and XRD and mesopore formation mechanism had been discussed.

DOI： 10.1007/s10934-006-8010-9

Other Link： http://orcid.org/0000-0003-1774-1537

Synthesis and characterization of molybdenum incorporated mesoporous aluminophosphate Reviewed

Li-Ngee Ho, Tasuku Ikegawa, Hiroyasu Nishiguchi, Katsutoshi Nagaoka, Yusaku Takita

APPLIED SURFACE SCIENCE Vol. 252 ( 18 ) page： 6260 - 6268 2006.7

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

A synthesis of molybdenum incorporated mesoporous aluminophosphate with long-chain n-alkylarnine as template material had been prepared under non-aqueous condition. These materials were extensively characterized by using X-ray diffraction (XRD), nitrogen sorption isotherms, nuclear magnetic resonance of Al-27 and P-31 (NMR), inductive coupled plasma (ICP), electron spin resonance (ESR), Fourier transform infrared (FTIR) and thermogravitnetric-differential thermal analysis (TG-DTA). Morphology of the materials had been observed by using transmission electron microscope (TEM) that revealed the mesoporous materials possessed wormhole-like structures. Alkaline solvent extraction using n-butylamine/ethanol had been efficiently removed the n-alkylamine from the mesoporous samples which yielded BET surface areas around 550-730 m(2)/g. BJH analysis showed a narrow pore size distribution which increased with increasing of the carbon chain length of alkylamine (template). Valence state and coordination of the molybdenum in the obtained samples were investigated by using ESR and FTIR where it was found that Mo4+ and Mo6+ molybdenum species existed in the molybdenum incorporated mesoporous aluminophosphate in tetrahedral coordination. (c) 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.apsusc.2005.08.064

Other Link： http://orcid.org/0000-0003-1774-1537

Ni/(rare earth phosphate) as a new effective catalyst for autothermal reforming of methane Reviewed

Katsutoshi Nagaoka, Toshikazu Eiraku, Hiroyasu Nishiguchi, Yusaku Takita

CHEMISTRY LETTERS Vol. 35 ( 6 ) page： 580 - 581 2006.6

Language：English Publishing type：Research paper (scientific journal) Publisher：CHEMICAL SOC JAPAN

The stability of metal phosphate during H-2 reduction is one of the critical factors that determine the catalytic behavior of Ni/(metal phosphate) in CH4 autothermal reforming. Ni/(rare earth phosphate), particularly Ni/(Gd, Cc, or ErPO4), has been found to be a new family of effective catalysts.

DOI： 10.1246/cl.2006.580

Other Link： http://orcid.org/0000-0003-1774-1537

Anaerobic oxidation of isobutane II. Catalysis by Mg-V complex oxides Reviewed

Y Takita, Q Xia, K Kikutani, K Soda, H Takami, H Nishiguchi, K Nagaoka

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL Vol. 248 ( 1-2 ) page： 61 - 69 2006.4

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Anaerobic oxidation of isobutane was studied using MgV2O6, Mg2V2O7 and Mg3V2O8. Isobutene, a small amount of COx, and trace amount of oxygen containing compounds were formed. CO2 Was formed mainly at the beginning of the reaction and decreased with reaction time. Catalytic activity of Mg2V2O7 was slightly higher than that of MgV2O6 but the CO., formation over MgV2O6 was more than over Mg2V2O7. Mg3V2O8 was the least active. Therefore, Mg2V2O7 is the most suitable for oxidative hydrogenation of isobutane under the anaerobic reaction conditions. The equilibration between O-16(2) and O-18(2) over MgV2O6 was faster than over Mg2V2O7 or Mg3V2O8 at 673 K. The rate of equilibration between O-18(2) and lattice oxygen over MgV2O6 was similar to that over Mg2V2O7, which was faster than over Mg3V2O8. Highest yield of isobutene formation over Mg2V2O7 would come from the character of Mg2V2O7, in which mobility of the lattice oxygen is great but surface reaction of isobutane was not so fast. Higher activity for isobutene formation may come from the nature Of Mg2V2O7, of which mobility of the lattice oxygen is great but surface reaction of isobutane was not so much fast. Mn, Cr, Fe, Ni and Co can be introduced into Mg2V2O7 to give a single phase. Substitution of Co, Cu and Cr for Mg increased the activity Of Mg2V2O7 for isobutane oxidation and substitution of Ni and Mn scarcely affected the activity but substitution of Fe and Zn decreased the activity. Substitution of all the metal ions slightly increased the isobutene selectivity. MgO, MgV2O4 and Mg3V2O8 were observed in the sample after the anaerobic oxidation of isobutane. Cu containing catalyst was reduced to give Cu metal. (c) 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.molcata.2005.12.012

Other Link： http://orcid.org/0000-0003-1774-1537

Synthesis of highly active sulfated zirconia by sulfation with SO3 Reviewed

XB Li, K Nagaoka, R Olindo, JA Lercher

JOURNAL OF CATALYSIS Vol. 238 ( 1 ) page： 39 - 45 2006.2

Language：English Publishing type：Research paper (scientific journal) Publisher：ACADEMIC PRESS INC ELSEVIER SCIENCE

Highly active sulfated zirconia (SZ) materials were prepared by sulfation of crystalline zirconia with gaseous SO3. This direct method circumvents the use of liquid sulfation agents, as well as a final calcination step. The amount of sulfur species retained by SO3-SZ samples was directly proportional to the fraction of monoclinic phase and the concentration of Bronsted acid sites. However, the catalytic activity in n-butane isomerization at 373 K was proportional to the concentration of labile chemisorbed SO3, most likely in the form of pyrosulfate species showing a characteristic IR band at 1404 cm(-1). Tetragonal zirconia favors the formation of these labile sulfur species, playing a key role in light alkane activation. (c) 2005 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.jcat.2005.11.039

Other Link： http://orcid.org/0000-0003-1774-1537

Decomposition of chlorobenzene over phosphate and sulfate catalysts properties Reviewed

Y Takita, Y Sadatomi, H Nishiguchi, K Nagaoka

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN Vol. 79 ( 1 ) page： 145 - 148 2006.1

Language：English Publishing type：Research paper (scientific journal) Publisher：CHEMICAL SOC JAPAN

The catalytic conversion of chlorobenzene (CB) over some metal phosphates and sulfate was studied in the presence of water vapor and oxygen. The conversion of CB proceeded in the order of AlPO4, Zr-3(PO4)(4), CePO4-AlPO4, and La-2(SO3)(3) above 673 K. The major products were CO, CO2, and HCl. The reaction proceeded in the absence of water vapor; however, the activity was greatly reduced in the absence of oxygen. Even in the presence of oxygen, 30 mol % of water vapor inhibited the reaction. No intermediate hydration products were observed. There was no correlation between each of the catalytic activity, the acidity, and the concentration of the surface hydroxys of the catalysts. These results suggest that the essential reaction for CB conversion is oxidation. The specific surface area (SSA) of the catalysts was not changed during the CB conversion.

DOI： 10.1246/bcsj.79.145

Other Link： http://orcid.org/0000-0003-1774-1537

Oxidative dehydrogenation of isobutane to isobutene III reaction mechanism over CePO4 catalyst Reviewed

Y Takita, Qing, X, A Takami, H Nishiguchi, K Nagaoka

APPLIED CATALYSIS A-GENERAL Vol. 296 ( 1 ) page： 63 - 69 2005.11

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Among rare earth phosphates, only CePO4 and LaPO4 exhibit very high activity for oxidative dehydrogenation (ODH) of isobutane. This phenomenon was studied in comparison with the corresponding oxides. Isobutene was formed over NdPO4, which was used as a representative of inactive phosphate catalysts, by simple dehydrogenation with 30-32% selectivity, C3H6 and CO2 were formed with a selectivity of 25-33% and 20-30%, respectively. Isobutene was obtained at a higher selectivity of 79-86% over CePO4 and LaPO4. No H, formation Suggests that the essential reaction wits the ODH of isobutane. In the oxidation over metal oxides, isobutene selectivity was relatively high: 60-70% over CeO2; however, the essential reaction was considered to be a simple dehydrogenation. Isobutene was formed at 40-47% selectivity, but simple dehydrogenation of isobutane would proceed over Nd2O3 and La2O3. La2O3, Nd2O3, and NdPO4 have only weak acidic sites. CeO2 has weak acidic sites and those with intermediate strength; LaPO4 and CePO4 have relatively strong acidic sites in addition to the weak acidic sites and those of intermediate strength. Oxidative dehydrogenation activity was correlated with strong acidic sites. ODH of isobutane occurred in the reaction between lattice oxygen of CePO4 and isobutane. Introduction of NH3 into the reaction system reduced both ODH of isobutane and CO2 formation; and stopping the NH3 supply led to a resumption of the activity, which suggests the participation of acidic sites. CePO4 catalyst contained 2% excess Ce to P; in the prepared CePO4 sample, Ce4+ was detected by XPS. We conclude that acidic sites and redox between Ce4+ and Ce3+ play important roles in the ODH of isobutane. (c) 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.apcata.2005.07.049

Other Link： http://orcid.org/0000-0003-1774-1537

Oxidative activation of n-butane on sulfated zirconia Reviewed

XB Li, K Nagaoka, LJ Simon, R Olindo, JA Lercher, A Hofmann, J Sauer

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Vol. 127 ( 46 ) page： 16159 - 16166 2005.11

Language：English Publishing type：Research paper (scientific journal) Publisher：AMER CHEMICAL SOC

Catalytic activation and conversion of light alkanes by sulfated zirconia is unequivocally shown to be initiated by producing small concentrations of olefins. This occurs via stoichiometric oxidative dehydrogenation of butane by SO3 or pyrosulfate groups to butene (present mostly as alkoxy groups), water, and SO2. Thermal desorption and in situ IR spectroscopy have been used to determine all three reaction products. The concentration of butene formed determines both the catalytic activity of sulfated zirconia as well as the deactivation via formation of oligomers. The thermodynamics of the oxidative dehydrogenation of n-butane by different SZ surface structures has been examined by density functional (DFT) calculations. The calculations show that pyrosulfate or re-adsorbed SO3 species have the highest oxidizing ability.

DOI： 10.1021/ja054126d

Other Link： http://orcid.org/0000-0003-1774-1537

Synthesis of a thermally stable mesoporous aluminophosphate by using sodium aluminate as precursor Reviewed

LN Ho, S Yukushima, R Morikawa, N Asaka, H Nishiguchi, K Nagaoka, Y Takita

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS Vol. 268 ( 1-3 ) page： 40 - 44 2005.10

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

Sodium aluminate has been used as the aluminium precursor in the synthesis of mesoporous aluminophosphate where cetylpyridinium chloride (CTPC) was used as structure directing agent. Synthesis of the materials was performed in a broad range of pH from 3 to 10. The obtained materials were characterized by using XRD, TEM, ICP, nitrogen sorption isotherms, solid state NMR, TG-DTA and FTIR. The samples prepared at pH 5-8 were thermally stable up to 450 degrees C and presented specific surface areas in the range of 420-640 m(2) g(-1) after calcination for removal of the surfactant material. TEM image revealed the obtained mesoporous aluminophosphate possessed disordered porous structures. DH analysis derived from the adsorption branch showed that the average pore size of the sample was 2.6 nm in the 5-8 pH range. (c) 2005 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.colsurfa.2005.05.015

Other Link： http://orcid.org/0000-0003-1774-1537

Improved resistance against coke deposition of titania supported cobalt and nickel bimetallic catalysts for carbon dioxide reforming of methane Reviewed

K Takanabe, K Nagaoka, K Aika

CATALYSIS LETTERS Vol. 102 ( 3-4 ) page： 153 - 157 2005.8

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER

The catalytic behavior of bi-metallic Co-Ni/TiO2 catalysts for CO2 reforming of CH4 to synthesis gas was investigated under atmospheric pressure with a particular attention to carbon deposition. The catalysts with optimized Co/Ni ratios showed high catalytic stability towards the reaction with very little amount of deposited carbon at a wide range of reaction temperature (773-1123 K). The results suggest that adjusting of composition of the active metals (Co and Ni) can kinetically control the elementary steps (formation of carbon species and its removal by oxygen species) of CH4/CO2 reaction.

DOI： 10.1007/s10562-005-5848-4

Other Link： http://orcid.org/0000-0003-1774-1537

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