| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZ3r59YDb/KbHgL |
| Repository | sid.inpe.br/iris@1917/2006/02.16.11.14 |
| Last Update | 2006:02.16.11.14.00 (UTC) administrator |
| Metadata Repository | sid.inpe.br/iris@1917/2006/02.16.11.15.01 |
| Metadata Last Update | 2018:06.05.03.43.39 (UTC) administrator |
| Secondary Key | INPE--PRE/ |
| ISSN | 0103-5053 |
| Citation Key | KellerVieNhuPhaLed:2005:NeSiNa |
| Title | New catalysts based on silicon carbide support for improvements in the sulfur recovery: new silicon nanotubes as catalyst support for the trickle-bed H2S oxidation  |
| Year | 2005 |
| Month | May-Jun. |
| Access Date | 2024, May 19 |
| Secondary Type | PRE PN |
| Number of Files | 1 |
| Size | 599 KiB |
| 2. Context | |
| Author | 1 Keller, Nicolas 2 Vieira, Ricardo 3 Nhut, Jean-Mario 4 Pham-Huu, Cuong 5 Ledoux, Marc-Jaques |
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JJ68 |
| Group | 1 LCP-INPE-MCT-BR |
| Affiliation | 1 Université Louis Pasteur 2 Instituto Nacional de Pesquisas Espaciais (INPE) |
| Journal | Journal of the Brazilian Chemical Society |
| Volume | 16 |
| Number | 3B |
| Pages | 514-519 |
| History (UTC) | 2006-02-16 11:16:27 :: ignes -> administrator :: 2010-05-11 02:47:12 :: administrator -> ignes :: 2011-11-01 18:29:47 :: ignes -> administrator :: 2005 2012-10-22 22:26:12 :: administrator -> ignes :: 2005 2013-02-20 14:54:14 :: ignes -> administrator :: 2005 2018-06-05 03:43:39 :: administrator -> marciana :: 2005 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Version Type | publisher |
| Keywords | silicon carbide nanotubes H2S oxidation sulfur recovery confinement effect |
| Abstract | Abstract - Silicon carbide nanotubes were prepared via a gas-solid reaction between SiO vapor and carbon nanotubes. The NiS2 active phase on this support displayed both a high catalytic activity and high solid sulfur storage capacity in the trickle-bed selective oxidation of H2S into elemental sulfur as compared to the grain-based SiC catalyst. The hypothesis of a confinement effect inside the SiC nanotubes has been put forward to explain the catalytic results. An artificial increase in the H2S partial pressure inside the tubes when compared to the H2S partial pressure outside the tubes would lead to an increase in the oxidation rate, due to the first order reaction rate toward H2S. The SiC nanotube supported catalyst displayed very high resistance to the sulfur loading, due to a peculiar mode of sulfur evacuation by condensed steam which allows the continuous cleaning of the active site. The high solid sulfur storage capacity was due to a much larger void volume between each SiC nanotube available for the sulfur storage, than the void volume of SiC support with a grain size morphology. Resumo - Nanotubos de carbeto de silício (SiC) foram preparados a partir da reação gás-sólido entre vapor de SiO e nanotubos de carbono. A fase ativa NiS2 suportada em nanotubos de SiC apresentou maior atividade catalítica e maior capacidade de armazenamento de enxofre na reação de oxidação seletiva do H2S a enxofre elementar, em reator do tipo trickle-bed, que a mesma fase ativa suportada em grãos de SiC. O melhor desempenho deste catalisador foi explicado pela ocorrência do efeito de confinamento no interior dos nanotubos de SiC; ou seja, pelo aumento artificial da pressão parcial de H2S no interior dos nanotubos em relação à mesma pressão fora dos nanotubos, resultando assim em um aumento na taxa da oxidação, uma vez que a velocidade de reação do H2S é de primeira ordem. O catalisador suportado em nanotubos de SiC apresentou elevada resistência ao carregamento de enxofre devido a uma peculiar evacuação do enxofre pelo vapor de água condensado, permitindo assim uma limpeza contínua dos sítios ativos. A maior capacidade de armazenamento do enxofre sólido no suporte a base de nanotubos de SiC foi atribuído ao seu maior volume específico disponível para o armazenamento do enxofre do que o do suporte a base de grãos de SiC. |
| Area | COMB |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABCP > New catalysts based... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| data URL | http://urlib.net/ibi/6qtX3pFwXQZ3r59YDb/KbHgL |
| zipped data URL | http://urlib.net/zip/6qtX3pFwXQZ3r59YDb/KbHgL |
| Language | en |
| Target File | new.pdf |
| User Group | administrator ignes |
| Visibility | shown |
| Archiving Policy | allowpublisher allowfinaldraft |
| Read Permission | allow from all |
| Update Permission | not transferred |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ET38CH |
| Citing Item List | sid.inpe.br/bibdigital@80/2006/04.07.15.50.13 2 |
| Dissemination | WEBSCI; PORTALCAPES; SCIELO. |
| Host Collection | lcp.inpe.br/ignes/2004/02.12.18.39 cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel doi e-mailaddress electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |