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1. Identity statement Reference Type Conference Paper (Conference Proceedings) Site mtc-m21d.sid.inpe.br Holder Code isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S Identifier 8JMKD3MGP3W34T/45E3PQ5 Repository sid.inpe.br/mtc-m21d/2021/09.13.12.23 Last Update 2021:09.13.12.23.45 (UTC) simone Metadata Repository sid.inpe.br/mtc-m21d/2021/09.13.12.23.45 Metadata Last Update 2022:04.03.23.14.36 (UTC) administrator Secondary Key INPE--PRE/ Citation Key SilvaSilvArdiSant:2021:EfMéPr Title Nanofibras de carbono e H2 a partir de decomposição do metano utilizando Fe: Efeito do método de preparação de catalisador Format On-line Year 2021 Access Date 2024, May 09 Secondary Type PRE CN Number of Files 1 Size 657 KiB 2. Context Author 1 Silva, Juliana A. da 2 Silva, Adriana Maria da 3 Ardisson, José D. 4 Santos, João B. O. dos Group 1 2 COPDT-CGIP-INPE-MCTI-GOV-BR Affiliation 1 Universidade Federal de São Carlos (UFSCar) 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Centro de Desenvolvimento de Tecnologia Nuclear 4 Universidade Federal de São Carlos (UFSCar) Author e-Mail Address 1 julianaalves@estudante.ufscar.br 2 adriana.silva@inpe.br Conference Name Congresso Brasileiro de Catálise, 21 Conference Location Online Date 13-17 set. Publisher Galoa Book Title Anais History (UTC) 2021-09-13 12:23:45 :: simone -> administrator :: 2022-04-03 23:14:36 :: administrator -> simone :: 2021 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 decomposição do metano nanofibra de carbono produção de H2 catalisadores de ferro methane decomposition carbon nanofiber H2 production iron catalysts Abstract O efeito do método de preparação dos catalisadores de ferro foi avaliado na produção de nanofibras de carbono e H2 a partir da decomposição catalítica do CH4. Os métodos de preparo dos catalisadores foram impregnação, coprecipitação e fusão. Os testes catalíticos foram realizados sob fluxo de CH4 a 800 °C e os catalisadores foram caracterizados por espectrometria de Mössbauer, DRX, área BET, TPR-H2, Raman e MEV. Os catalisadores preparados pelo método de fusão e impregnação apresentaram majoritariamente espécies de α-Fe2O3 com tamanho de cristalito de 25 nm. A amostra preparada pelo método de fusão foi ativo e estável por 3 horas, atingindo 50 vol.% de H2 e 2,7 gramas de carbono por grama de catalisador. Entretanto, o material preparado pelo método de impregnação teve parte da fase ativa inacessível (28 vol.% de H2) e não foi capaz de gerar nanofibras. O catalisador preparado pelo método de coprecipitação apresentou partículas amorfas e/ou nanopartículas de espécies Fe3+ gerados pela substituição isomórfica, que foram ativas (máximo de 50 vol.% de H2) e instáveis, capazes de produzir nanofibras de carbono. O carbono produzido apresentou baixa quantidade de defeitos. ABSTRACT: - The effect of the method of preparation of iron catalysts was evaluated on the production of carbon nanofibers and H2 from the catalytic decomposition of CH4. The catalyst preparation methods were impregnation, co-precipitation and fusion. The catalytic tests were carried out under CH4 flow at 800 °C and the catalysts were characterized by Mössbauer spectrometry, DRX, BET area, TPR-H2, Raman and MEV. The catalysts prepared by the fusion and impregnation method showed mostly α-Fe2O3 species with a crystallite size of 25 nm. The sample prepared by the fusion method was active and stable for 3 hours, reaching 50 vol.% of H2 and 2.7 grams of carbon per gram of catalyst. However, the material prepared by the impregnation method had part of the active phase inaccessible (28 vol.% H2) and was not able to generate nanofibers. The catalyst prepared by the co-precipitation method presented amorphous particles and/or nanoparticles of Fe3+ species generated by isomorphic substitution, which were active (maximum of 50 vol.% of H2) and unstable, capable of producing carbon nanofibers. The carbon produced had a low number of defects. Area COMB Arrangement urlib.net > BDMCI > Fonds > Produção a partir de 2021 > CGIP > Nanofibras de carbono... doc Directory Content access source Directory Content there are no files agreement Directory Content agreement.html 13/09/2021 09:23 1.0 KiB  4. Conditions of access and use data URL http://urlib.net/ibi/8JMKD3MGP3W34T/45E3PQ5 zipped data URL http://urlib.net/zip/8JMKD3MGP3W34T/45E3PQ5 Language pt Target File silva_nanofibras.pdf User Group simone Visibility shown Update Permission not transferred 5. Allied materials Next Higher Units 8JMKD3MGPCW/46KUES5 Citing Item List sid.inpe.br/bibdigital/2022/04.03.23.11 2 Host Collection urlib.net/www/2021/06.04.03.40 6. Notes Empty Fields archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor isbn issn label lineage mark mirrorrepository nextedition notes numberofvolumes orcid organization pages parameterlist parentrepositories previousedition previouslowerunit progress project publisheraddress readergroup readpermission resumeid rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype type url volume 7. Description control e-Mail (login) simone update

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