Blog
About

  • Record: found
  • Abstract: found
  • Article: found
Is Open Access

Obtenção de hydrochar a partir de carbonização hidrotérmica de cascas do fruto de Magonia pubescens A. St. Hil. Sapindaceae: Caracterização e avaliação em processo de adsorção Translated title: Obtaining hydrochar via hydrothermal carbonization of Magonia pubescens A. St. Hil. Sapindaceae fruit bark: Characterization and evaluation of its adsorptive properties

Read this article at

Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      RESUMO A Carbonização hidrotermal (HTC) de cascas do fruto de Magonia pubescens A. St. Hil. Sapindaceae (Tingui do cerrado) é apresentada como uma proposta inédita na produção de hydrochars a partir de precursores de espécies do Cerrado Brasileiro, onde se verificou a influência da temperatura nas propriedades dos materiais obtidos. Os hyrochar obtidos foram caracterizados em termos de rendimento em peso, análise elementar e estimativa do poder calorífico superior (PCS), análise de espectroscopia na região do infravermelho (FT-IR), difratometria de raios-x (DRX) e avaliação da capacidade de adsorção. O aumento da temperatura afetou negativamente o rendimento do hydrochar, o qual variou entre 46,25 % e 27,42%, nas temperaturas de 170 e 190 °C, respectivamente. Hydrochars com maior teor de carbono (64,10%) foram obtidos em baixa temperatura (170 °C), o qual também apresentou maior poder calorífico superior (23,94 MJ kg-1) e área superficial específica (44,0 m2.g-1). A evolução das razões atômicas H/C e O/C indicou processos de desidratação e descarboxilação durante a carbonização hidrotérmica. As isotermas de adsorção-dessorção de N2 a -176 ºC, resultantes da análise das propriedades texturais e estruturais, demonstraram a presença de mesoporos na estrutura dos hydrochars. Na avaliação da capacidade de adsorção com azul de metileno, a isoterma de Langmuir foi a que melhor explicou o comportamento de adsorção, tendo os hydrochars obtidos a 170 e 180 °C as maiores capacidades de adsorção (139,38 e 202,40 mg g-1, respectivamente). Os resultados indicaram a carbonização hidrotermal de cascas do fruto de tingui como uma nova estratégia para o desenvolvimento de hydrochars com alto rendimento, teor de carbono elevado e alta eficiência de adsorção, valores superiores a diversos trabalhos encontrados na literatura.

      Translated abstract

      ABSTRACT The hydrothermal carbonization (HTC) of bark of the fruit of Magonia pubescens A. St. Hil. Sapindaceae (Tingui do Cerrado) presents as an unprecedented proposal for the production of hydrochars from precursors of Brazilian Cerrado species, where the influence of temperature on the properties of the obtained materials is verified. The obtained hydrochar were characterized in terms of yield, elemental analysis, estimation of the higher calorific value, infrared spectroscopy, X-ray diffractometry, and methylene blue adsorption. The temperature increases affected negatively hydrochar yield, which varied between 46,25% and 27,42%, at temperatures of 170 and 190 °C, respectively. Hydrochar with higher carbon content (64,10%), higher calorific value (23,94 MJ kg-1) and specific surface area (44,0 m2 g-1) were obtained at 170 °C. The evolution of the atomic ratios H/C and O/C indicated processes of dehydration and decarboxylation during hydrothermal carbonization. The adsorption-desorption isotherms of N2 at -176º C resulting from the analysis of the textural and structural properties demonstrated the presence of mesopores in the structure of the hydrochars. In the evaluation of the adsorption capacity with methylene blue, the adsorption data correlated well with the Langmuir isotherm. In this analysis, the hydrochars obtained at 170 and 180 °C demonstrated the highest adsorption capacity (Qmax = 139,38 and 202,40 mg g-1, respectively). The results indicated the hydrothermal carbonization of the bark of the tingui fruit as a new strategy for the development of hydrochars with high yield, high carbon content and high adsorption efficiency, higher values than several papers found in the literature.

      Related collections

      Most cited references 73

      • Record: found
      • Abstract: not found
      • Article: not found

      The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms

        Bookmark
        • Record: found
        • Abstract: not found
        • Article: not found

        THE CONSTITUTION AND FUNDAMENTAL PROPERTIES OF SOLIDS AND LIQUIDS. PART I. SOLIDS.

          Bookmark
          • Record: found
          • Abstract: found
          • Article: not found

          Engineering carbon materials from the hydrothermal carbonization process of biomass.

          Energy shortage, environmental crisis, and developing customer demands have driven people to find facile, low-cost, environmentally friendly, and nontoxic routes to produce novel functional materials that can be commercialized in the near future. Amongst various techniques, the hydrothermal carbonization (HTC) process of biomass (either of isolated carbohydrates or crude plants) is a promising candidate for the synthesis of novel carbon-based materials with a wide variety of potential applications. In this Review, we will discuss various synthetic routes towards such novel carbon-based materials or composites via the HTC process of biomass. Furthermore, factors that influence the carbonization process will be analyzed and the special chemical/physical properties of the final products will be discussed. Despite the lack of a clear mechanism, these novel carbonaceous materials have already shown promising applications in many fields such as carbon fixation, water purification, fuel cell catalysis, energy storage, CO(2) sequestration, bioimaging, drug delivery, and gas sensors. Some of the most promising examples will also be discussed here, demonstrating that the HTC process can rationally design a rich family of carbonaceous and hybrid functional carbon materials with important applications in a sustainable fashion.
            Bookmark

            Author and article information

            Affiliations
            São Paulo São Paulo orgnameUniversidade de São Paulo orgdiv1Escola Politécnica da USP orgdiv2Departamento de Engenharia Química Brazil
            Oulu Oulu orgnameUniversity of Oulu orgdiv1Faculty of Technology orgdiv2Environmental and Chemical Engineering Finland
            Brasília Distrito Federal orgnameUniversidade de Brasília orgdiv1Instituto de Química Brazil
            Goiânia Goiás orgnameInstituto Federal de Goiás orgdiv1Departamento de Química Brasil
            Contributors
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Role: ND
            Journal
            rmat
            Matéria (Rio de Janeiro)
            Matéria (Rio J.)
            Rede Latino-Americana de Materiais (Rio de Janeiro, RJ, Brazil )
            1517-7076
            2019
            : 24
            : 2
            S1517-70762019000200338 10.1590/s1517-707620190002.0693

            This work is licensed under a Creative Commons Attribution 4.0 International License.

            Counts
            Figures: 0, Tables: 0, Equations: 0, References: 78, Pages: 0
            Product
            Product Information: SciELO Brazil
            Categories
            Artigos

            Comments

            Comment on this article