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Interpretation of the Multiplicity of Kinetics in Heterogeneous Catalysis
https://kitami-it.repo.nii.ac.jp/records/6646
https://kitami-it.repo.nii.ac.jp/records/664669bc390a-317c-4609-bfe0-64545d168b35
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
21-1-3.pdf (7.0 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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| 公開日 | 2007-04-09 | |||||
| タイトル | ||||||
| タイトル | Interpretation of the Multiplicity of Kinetics in Heterogeneous Catalysis | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源 | http://purl.org/coar/resource_type/c_6501 | |||||
| タイプ | departmental bulletin paper | |||||
| 著者 |
Hiroshi, TAKEDA
× Hiroshi, TAKEDA× Tohru, KANNO× Masayoshi, KOBAYASHI |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The multiplicity of reaction kinetics in heterogeneous catalysis has been studied by using the oxidation of propene over Pt/SiO_2 of widely varying dispersion, relating to the adsorption behavior of reaction components at temperature a range of 290?350℃. The reaction consists of a partial oxidation to propanal and complete oxidation to CO_2 and H_20, each of which progresses independently in parallel on own active sites. The rate of propanal formation indicates a characteristic oscillation. The oscillation seems to be a multiplicity caused by the switching between two different surface structures on each of which the partial oxidation progresses at different rate, high rate (γCHO^H) and low rate (γCHO^L). For γCHO^H andγCHO^L, the L-H and E-R models consistently explained all experimental data. Three rate equations for the two rates to form propanal and the complete oxidation are expressed γCHO^H =κCHO^HPc_3H_6^<0.25>Pn_2O^<0.42> γ^<CHOL>=κCHO^LPc_3H_6^<0.29>Pn_2O^<0.31> γCO_2=κCO_2Pc_3H_6^<0.36>Pn_2O^<0.81> The activation energies for propanal formation at high and low rates and for CO_2 formation were evaluated to be 9(±4)kJ/mol 92?218kJ/mol and 85(±5)kJ/mol, respectively. All the surface coverages of N_20, C_3H_6 and propanal during the reaction were evaluated to be θN_2O=0.13, θC_3H_6=0.69?1.17 and θCHO=0.15, respectively. θC_3H_6 is presumed to be a sort of trigger for the oscillating rate. | |||||
| 言語 | en | |||||
| 書誌情報 |
ja : 北見工業大学研究報告 巻 21, 号 1, p. 25-43, 発行日 1989-11 |
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| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 著者版フラグ | ||||||
| 言語 | en | |||||
| 値 | publisher | |||||
| 出版者 | ||||||
| 出版者 | 北見工業大学 | |||||
| 言語 | ja | |||||
