Submitted by PPG Engenharia e Tecnologia de Materiais (engenharia.pg.materiais@pucrs.br) on 2017-10-31T16:39:49Z
No. of bitstreams: 1
Disserta??o Final Mar?lia Philippi 2017.pdf: 2898458 bytes, checksum: 0de5c21261331f990e604d9223f1206a (MD5) / Approved for entry into archive by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-11-10T12:35:15Z (GMT) No. of bitstreams: 1
Disserta??o Final Mar?lia Philippi 2017.pdf: 2898458 bytes, checksum: 0de5c21261331f990e604d9223f1206a (MD5) / Made available in DSpace on 2017-11-10T12:41:16Z (GMT). No. of bitstreams: 1
Disserta??o Final Mar?lia Philippi 2017.pdf: 2898458 bytes, checksum: 0de5c21261331f990e604d9223f1206a (MD5)
Previous issue date: 2017-08-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Growing concern about global warming and reducing greenhouse gas emissions in the atmosphere has driven the development of technological options to reduce the negative impacts of human activities, and CO2 capture and storage is one of them. Solid adsorbent materials are being used with the aim of adsorbing polluting gases. Metal-Organic Frameworks (MOFs) are a class of porous materials of great potential for adsorption of greenhouse gases, formed by the connection of metallic ions and organic binders. In this context, the objective of this work is to synthesize the MOF of type NH2-MIL-53(Al), to characterize and evaluate its use in the adsorption of carbon dioxide. For synthesis of the MOF, a hydrothermal process was used in a PFA closed reactor (155 ?C) with subsequent washes and resuspensions, obtaining an average mass yield of 90%. The obtained MOF was characterized with the use of the techniques such as SEM-FEG-EDS, elemental analysis, FAAS, XRF, FTIR, TGA, XRD/Refinement by the Rietveld Method and MAS-NMR, exhibiting characteristics of the structure NH2-MIL-53(Al). For the adsorption and desorption tests of CO2 the synthesized material was used as a powder in a fixed bed system. The synthesized MOF presented CO2 adsorption capacity of 0.13 mmol g-1 and SBET of 27 m2 g-1, lower than that reported in the literature, which were attributed to the presence of occluded binder in the pores of the material. The calculated average cost for the synthesis of the MOF in the laboratory was 34% of the value of the non-functionalized commercial standard available in the market. The residual solvent purification process from the MOF synthesis proved to be satisfactory, completely removing the DMF and with a residual contribution of methanol of only 0.00008%. / A crescente preocupa??o com o aquecimento global e com a redu??o das emiss?es de gases de efeito estufa na atmosfera tem impulsionado o desenvolvimento de op??es tecnol?gicas para redu??o dos impactos negativos das atividades humanas e, a captura e armazenamento de CO2 ? uma delas. Materiais s?lidos adsorventes est?o sendo utilizados com o objetivo de adsorver gases poluentes. Os Metal-Organic Frameworks (MOFs) s?o uma classe de materiais porosos de grande potencial para adsor??o de gases de efeito estufa, formados pela conex?o de ?ons met?licos e ligantes org?nicos. Neste contexto, o objetivo deste trabalho ? sintetizar o MOF do tipo NH2-MIL-53(Al), caracterizar e avaliar seu uso na adsor??o de di?xido de carbono. Para s?ntese do MOF foi utilizado processo hidrot?rmico em reator fechado de PFA (155 ?C) com posteriores lavagens e resuspens?es, obtendo um rendimento m?ssico m?dio de 90%. O MOF obtido foi caracterizado com o uso das t?cnicas como MEV-FEG-EDS, an?lise elementar, FAAS, FRX, FTIR, TGA, DRX/Refinamento pelo M?todo Rietveld e MAS-RMN, apresentando caracter?sticas da estrutura NH2-MIL-53(Al). Para os testes de adsor??o e dessor??o de CO2 o material sintetizado foi utilizado sob a forma de p? em sistema de leito fixo. O MOF sintetizado apresentou capacidade de adsor??o de CO2 de 0,13 mmol g-1 e SBET de 27 m2 g-1, inferiores ao reportado pela literatura, e que foram atribu?dos a presen?a de ligante oclu?do nos poros do material. O custo m?dio calculado para s?ntese do MOF em laborat?rio foi de 34% do valor do padr?o comercial n?o funcionalizado dispon?vel no mercado. O processo de purifica??o do solvente residual da s?ntese do MOF demonstrou ser satisfat?rio, removendo completamente o DMF e com uma contribui??o residual de metanol de apenas 0,00008%.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/7727 |
| Date | 31 August 2017 |
| Creators | Philippi, Mar?lia |
| Contributors | Pires, Mar?al Jos? Rodrigues, Dedavid, Berenice Anina |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Engenharia e Tecnologia de Materiais, PUCRS, Brasil, Faculdade de Engenharia |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -7432719344215120122, 600, 500, 500, 600, -655770572761439785, 4518971056484826825, 2075167498588264571 |
Page generated in 0.0022 seconds