Filamentous carbon templated SiO2–NiO aerogel: structure and catalytic properties for direct oxidation of hydrogen sulfide into sulfur
Silica aerogels comprising nickel oxide nanoparticles were synthesized with no use of supercritical drying. A high specific surface area (more than 1000 m2/g), mesoporous structure and considerable stability to sintering up to 900 °C are characteristic of these aerogels. The aerogels were synthesize...
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| Veröffentlicht in: | Catalysis letters 2000-01, Vol.70 (1-2), p.83-91 |
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| creator | Ermakova, Marina A Dmitriy Yu Ermakov Max Yu Lebedev Rudina, Nina A Kuvshinov, Gennadiy G |
| description | Silica aerogels comprising nickel oxide nanoparticles were synthesized with no use of supercritical drying. A high specific surface area (more than 1000 m2/g), mesoporous structure and considerable stability to sintering up to 900 °C are characteristic of these aerogels. The aerogels were synthesized using the sol–gel method. Filamentous carbon was templated by silica, tetraethoxysilane being used for supplying silica. Carbon was burnt later. Analysis of the aerogel structure revealed the presence of silica nanotubes and nanofibers. Aerogel testing for direct oxidation of H2S into S0 demonstrated as high as 60% conversion of hydrogen sulfide at almost 100% selectivity under stoichiometric conditions at the temperature range of 300–350 °C and 73% conversion at 100% selectivity at a considerable excess of oxygen at 160 °C. |
| doi_str_mv | 10.1023/A:1019019317391 |
| format | Article |
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A high specific surface area (more than 1000 m2/g), mesoporous structure and considerable stability to sintering up to 900 °C are characteristic of these aerogels. The aerogels were synthesized using the sol–gel method. Filamentous carbon was templated by silica, tetraethoxysilane being used for supplying silica. Carbon was burnt later. Analysis of the aerogel structure revealed the presence of silica nanotubes and nanofibers. Aerogel testing for direct oxidation of H2S into S0 demonstrated as high as 60% conversion of hydrogen sulfide at almost 100% selectivity under stoichiometric conditions at the temperature range of 300–350 °C and 73% conversion at 100% selectivity at a considerable excess of oxygen at 160 °C.</description><identifier>ISSN: 1011-372X</identifier><identifier>EISSN: 1572-879X</identifier><identifier>DOI: 10.1023/A:1019019317391</identifier><language>eng</language><publisher>Dordrecht: Springer Nature B.V</publisher><subject>Carbon ; Catalysis ; Conversion ; Hydrogen sulfide ; Nanofibers ; Nanoparticles ; Nickel oxides ; Oxidation ; Selectivity ; Silica aerogels ; Silicon dioxide ; Sol-gel processes ; Structural stability ; Synthesis ; Tetraethyl orthosilicate</subject><ispartof>Catalysis letters, 2000-01, Vol.70 (1-2), p.83-91</ispartof><rights>Catalysis Letters is a copyright of Springer, (2000). 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A high specific surface area (more than 1000 m2/g), mesoporous structure and considerable stability to sintering up to 900 °C are characteristic of these aerogels. The aerogels were synthesized using the sol–gel method. Filamentous carbon was templated by silica, tetraethoxysilane being used for supplying silica. Carbon was burnt later. Analysis of the aerogel structure revealed the presence of silica nanotubes and nanofibers. 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A high specific surface area (more than 1000 m2/g), mesoporous structure and considerable stability to sintering up to 900 °C are characteristic of these aerogels. The aerogels were synthesized using the sol–gel method. Filamentous carbon was templated by silica, tetraethoxysilane being used for supplying silica. Carbon was burnt later. Analysis of the aerogel structure revealed the presence of silica nanotubes and nanofibers. Aerogel testing for direct oxidation of H2S into S0 demonstrated as high as 60% conversion of hydrogen sulfide at almost 100% selectivity under stoichiometric conditions at the temperature range of 300–350 °C and 73% conversion at 100% selectivity at a considerable excess of oxygen at 160 °C.</abstract><cop>Dordrecht</cop><pub>Springer Nature B.V</pub><doi>10.1023/A:1019019317391</doi><tpages>9</tpages></addata></record> |
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| identifier | ISSN: 1011-372X |
| ispartof | Catalysis letters, 2000-01, Vol.70 (1-2), p.83-91 |
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| language | eng |
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| source | SpringerNature Journals |
| subjects | Carbon Catalysis Conversion Hydrogen sulfide Nanofibers Nanoparticles Nickel oxides Oxidation Selectivity Silica aerogels Silicon dioxide Sol-gel processes Structural stability Synthesis Tetraethyl orthosilicate |
| title | Filamentous carbon templated SiO2–NiO aerogel: structure and catalytic properties for direct oxidation of hydrogen sulfide into sulfur |
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