@misc{CunhaCordeiroSilvadeAquinoSantosdaSilvaetal., author = {Cunha Cordeiro, Jos{\´e} Luiz and Silva de Aquino, Gabrielle and Santos da Silva, Jefferson and Safdar, Muddasar and Dorneanu, Bogdan and Arellano-Garc{\´i}a, Harvey and Valverde Pontes, Karen and Santos Mascarenhas, Artur Jos{\´e}}, title = {Estudo do efeito do suporte em catalisadores de Ni preparados pelo m{\´e}todo da combust{\~a}o aplicados na reforma a seco do biog{\´a}s para produ{\c{c}}{\~a}o de hidrog{\^e}nio sustent{\´a}vel}, series = {63rd Brazilian Chemistry Congress}, journal = {63rd Brazilian Chemistry Congress}, pages = {11}, language = {pt} } @misc{CunhaCordeiroSafdarSantosdaSilvaetal., author = {Cunha Cordeiro, Jos{\´e} Luiz and Safdar, Muddasar and Santos da Silva, Jefferson and Silva de Aquino, Gabrielle and Vaz dos Santos Rios, Jo{\~a}o Gabriel and Brand{\~a}o dos Santos, Maur{\´i}cio and Teixeira Cruz, Fernanda and Alves Fiuza-Junio, Raildo and Dorneanu, Bogdan and Arellano-Garcia, Harvey and Valverde Pontes, Karen and Santos Mascarenhas, Artur Jos{\´e}}, title = {Effect of support on Ni catalysts prepared by the combustion method applied in the dry reforming of biogas for production of sustainable hydrogen}, series = {International journal of hydrogen energy}, volume = {204}, journal = {International journal of hydrogen energy}, publisher = {Elsevier BV}, address = {Amsterdam}, issn = {1879-3487}, doi = {10.1016/j.ijhydene.2025.153150}, pages = {1 -- 25}, abstract = {This work investigated Ni catalysts on different supports (MgO, ZrO2, NiAl2O4, CeO2 and La2O3) prepared by the combustion method aiming for sustainable hydrogen production via simulated biogas dry reforming. The Ni/NiAl2O4 catalyst stood out among the materials due to its high Ni dispersion, low crystallite size and strong metal-support interaction, being stable for 8 h of reaction with high H2 yield and low coke deposition. The Ni/CeO2 catalyst showed good catalytic activity, but with high coke deposition (11.7 \%). The Ni/La2O3 catalyst showed an increase over the reaction time, due to the dynamic reconstruction of the surface. The Ni/MgO and Ni/ZrO2 catalysts did not present satisfactory performance when compared to the other catalysts, due to the low Ni dispersion and high crystallite size. The Ni/NiAl2O4 catalyst is very promising, due to the high production of H2, low coke deposition, thermal stability, but new studies on durability and economic viability are necessary.}, language = {en} } @misc{CunhaCordeiroSafdarSantosdaSilvaetal., author = {Cunha Cordeiro, Jos{\´e} Luiz and Safdar, Muddasar and Santos da Silva, Jefferson and De Aquino, Gabrielle and Dos Santos, Mauricio and Cruz, Fernanda and Fiuza-Junior, Raildo A. and Dorneanu, Bogdan and Arellano-Garcia, Harvey and Pontes, Karen and Mascarenhas, Artur}, title = {Influ{\^e}ncia do Suporte em Catalisadores de Ni Obtidos Pelo M{\´e}todo da Combust{\~a}o na Reforma a Seco do Biog{\´a}s para Produ{\c{c}}{\~a}o de Hidrog{\^e}nio Sustent{\´a}vel}, series = {23º CBCAT : Congresso Brasileiro de Catalise}, volume = {1}, journal = {23º CBCAT : Congresso Brasileiro de Catalise}, number = {1}, pages = {1 -- 6}, abstract = {Este estudo avaliou catalisadores de NiO suportados em MgO, ZrO₂, Al₂O₃, La₂O₃ e CeO₂ para reforma a seco do biog{\´a}s. As caracteriza{\c{c}}{\~o}es revelaram varia{\c{c}}{\~o}es na dispers{\~a}o met{\´a}lica, {\´a}rea met{\´a}lica e morfologia superficial. Os catalisadores NiO-Al₂O₃ e NiO-CeO₂ apresentaram maior {\´a}rea met{\´a}lica e melhor dispers{\~a}o de Ni, favorecendo altas convers{\~o}es de CH₄ e CO₂ e bom rendimento em H₂. O NiO-Al₂O₃ foi o mais eficiente e est{\´a}vel por 8 horas de rea{\c{c}}{\~a}o. O NiO-La₂O₃ mostrou aumento progressivo da atividade e boa resist{\^e}ncia ao coque. O NiO-CeO₂, embora ativo no in{\´i}cio, desativou com o tempo devido {\`a} deposi{\c{c}}{\~a}o de coque (6,4\%). A an{\´a}lise p{\´o}s-rea{\c{c}}{\~a}o mostrou baixa forma{\c{c}}{\~a}o de coque na maioria dos catalisadores. Os resultados indicam que o suporte tem papel determinante na atividade, estabilidade e resist{\^e}ncia dos catalisadores na reforma a seco do biog{\´a}s. Palavras-chave: Hidrog{\^e}nio sustent{\´a}vel; Reforma a seco do biog{\´a}s; Catalisadores de NiO; efeito do suporte ABSTRACT-This study evaluates NiO-based catalysts supported on MgO, ZrO₂, Al₂O₃, La₂O₃, and CeO₂ for the dry reforming of biogas. Characterization of the samples revealed differences in metal dispersion, metallic area, and surface morphology. NiO-Al₂O₃ and NiO-CeO₂ show higher metallic areas and better Ni dispersion, leading to higher CH₄ and CO₂ conversions and good H₂ yield. NiO-Al₂O₃ is the most efficient and stable catalyst over 8 hours of reaction. NiO-La₂O₃ shows a gradual increase in activity and good coke resistance. Conversely, NiO-CeO₂, despite high initial activity, deactivates over time due to coke deposition (6.4\%). Post-reaction analysis confirmed low coke formation for most catalysts. The results indicate that the choice of support directly affects catalyst activity, stability, and resistance.}, language = {pt} }