Valorization of Material Wastes for Environmental, Energetic and Biomedical Applications II

A special issue of Eng (ISSN 2673-4117).

Deadline for manuscript submissions: closed (24 February 2023) | Viewed by 2172

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INAMAT^2-Departamento de Ciencias, Edificio de los Acebos, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
Interests: preparation, characterization, and catalytic activity of metal-supported catalysts; surface properties of solids; pollutants adsorption; environmental management; industrial waste valorization
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Special Issue Information

Dear Colleagues,

The development of materials from industrial wastes has attracted the attention of the research community for years. The physico-chemical characteristics have specific impacts on the material properties and the materials are applied in environmental, energetic and biomedical areas as pollutant removal, CO2 capture, energy storage, catalytic oxidation and reduction processes, the conversion of biomass to biofuels, and drug delivery. Examples of materials are activated carbons, clays, zeolites, among others. The aim of this Special Issue is to collect the recent advances and progresses developed, considering valorised materials from industrial wastes and their applications in environmental, energetic and biomedical areas.

Prof. Dr. Antonio Gil Bravo
Guest Editor

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Keywords

  • activated carbons
  • clays
  • hydrotalcite-like compounds
  • metal-organic frameworks (MOFs)
  • nanoporous materials
  • ordered mesoporous materials: pillared interlayered clays (PILCs)
  • polymers
  • zeolites and zeolite-like materials
  • adsorption applications
  • air pollution control: catalytic applications
  • energy storage
  • purification/separation of gases and liquids
  • removal of pollutants
  • sensors
  • wastewater treatment

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Published Papers (1 paper)

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10 pages, 1339 KiB  
Article
Preparation and Physicochemical Characterization of Biodiesel from Recycled Vegetable Oil in Cuenca, Ecuador by Transesterification Catalyzed by KOH and NaOH
by Jennifer Ramírez, Lourdes Buestán, Eduardo Alberto López-Maldonado and Verónica Pinos-Vélez
Eng 2023, 4(1), 954-963; https://doi.org/10.3390/eng4010056 - 09 Mar 2023
Cited by 2 | Viewed by 1647
Abstract
Due to the environmental impact of using fossil fuels, alternatives for the generation of biofuels are being studied. An option for this problem is to obtain biodiesel from recycled vegetable oil. Studies show that basic homogeneous catalysis has advantages such as speed over [...] Read more.
Due to the environmental impact of using fossil fuels, alternatives for the generation of biofuels are being studied. An option for this problem is to obtain biodiesel from recycled vegetable oil. Studies show that basic homogeneous catalysis has advantages such as speed over other types of catalysis. However, most of these studies are conducted with unused or little-used oils. Therefore, this study aims to obtain biodiesel from recycled vegetable oil collected from municipal oil collection centers by transesterification applying NaOH or KOH as catalysts. The used oil was filtered, washed, and dried to remove impurities. The transesterification reaction catalyzed with NaOH and KOH was carried out; each catalyst was tested at two concentrations: 0.5% and 1% w/w. All reactions were carried out at 55 °C, 350 rpm, methanol, and alcohol/oil ratio of 6/1 for 1.5 h. The best yield was found with the KOH with a concentration of 0.5%. The biodiesel obtained presented the following properties: density of 0.8807 g/mL, a viscosity of 4.694 mm2/s, an acid number of 0.355 mg KOH/g, and corrosion 1a, a calorific value of 39,726 J/g, and a FAME of 93%. Full article
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