Listar IQ - Artículos por título
Mostrando ítems 1-20 de 48
-
A Kinetic Model Considering Catalyst Deactivation for Methanol-to-Dimethyl Ether on a Biomass-Derived Zr/P-Carbon Catalyst
(IOAP-MDPI, 2022-01-13)A Zr-loaded P-containing biomass-derived activated carbon (ACPZr) has been tested for methanol dehydration between 450 and 550 °C. At earlier stages, methanol conversion was complete, and the reaction product was mainly ... -
A new versatile x–y–z electrospinning equipment for nanofiber synthesis in both far and near field.
(Nature, 2022-03-22)This work describes a versatile electrospinning equipment with rapid, independent, and precise x–y–z movements for large-area depositions of electrospun fibers, direct writing or assembly of fibers into sub-millimeter and ... -
Acid leaching of LiCoO2 enhanced by reducing agent. Model formulation and validation.
(Elsevier, 2021-08-25)In this work, a model has been formulated to describe the complex process of LiCoO2 leaching through the participation of competing reactions in acid media including the effect of H2O2 as reducing agent. The model presented ... -
Activation of electrospun lignin-based carbon fibers and their performance as self-standing supercapacitor electrodes
(Elsevier, 2020)The production and activation of self-standing carbon electrodes from electrospun lignin fibers was analyzed in this work. Carbon microfibers were prepared at 900 °C from air-stabilized spun cloths by direct carbonization ... -
Activation of electrospun lignin-based carbon fibers and their performance as self-standing supercapacitor electrodes
(2020-02-17)The production and activation of self-standing carbon electrodes from electrospun lignin fibers was analyzed in this work. Carbon microfibers were prepared at 900 °C from air-stabilized spun cloths by direct carbonization ... -
Advances in electrospun composite polymer/zeolite and geopolymer nanofibers: A comprehensive review.
(Elsevier, 2024-02-05)Electrospinning is widely recognized as an efficient, simple, and cost-effective technique for producing nanofibers. It has successfully led to the fabrication of various ultrafine polymer composites. This method has spurred ... -
Assessment of Agricultural Residue to Produce Activated Carbon-Supported Nickel Catalysts and Hydrogen Rich Gas.
(MDPI, 2023-05-08)The aim of this study was to synthesize chemically activated carbons from different agricultural residues, i.e., pistachio shell (PS), bitter orange peel (OP), and saffron petal (SP), and subsequently to use them as supports ... -
Bi-reforming of Biogas for Hydrogen Production with Sulfur-Resistant Multimetallic Catalyst
(Wiley, 2023)A multimetallic sample, NiCeSnRh/Al2O3, was tested in methane reforming with a CH4:H2O:CO2 molar ratio equal to 3:2:1. A very stable methane conversion with the time-on-stream was achieved during 20 h. Dimethyl sulfide ... -
Biomass-derived activated carbon catalysts for the direct dimethyl ether synthesis from syngas
(Elsevier, 2024-02-27)The direct DME synthesis from syngas was studied by using activated carbon-based bifunctional catalytic beds. Two kinds of activated carbons, prepared by physical (by CO2 partial gasification) and chemical (with phosphoric ... -
Carbon-based materials as Catalyst Supports for Fischer–Tropsch Synthesis: a review
(Frontiers, 2021-02-04)The use of carbon-based materials as catalyst supports for Fischer–Tropsch synthesis (FTS) is thoroughly reviewed. The main factors to consider when using a carbonaceous catalyst support for FTS are first discussed. Then, ... -
Carbon-supported VPO catalysts with fibrous structure: A new family of catalysts for partial oxidation reactions
(Elsevier, 2023-07-15)The present contribution describes the synthesis of a carbon supported VPO catalyst with a fibrous structure. The synthesis method is simple, low-cost, scalable and reproducible that allows the formation of the bulk mixed ... -
Carbon/H-ZSM-5 composites as supports for bi-functional Fischer-Tropsch synthesis catalysts
(Royal Society of Chemistry, 2016)Mesoporous H-ZSM-5–carbon composites, prepared via tetrapropylammonium hydroxide (TPAOH) post treatment of H-ZSM-5 followed by deposition of pyrolytic carbon, have been used as the support for the preparation of Co-based ... -
Chemical reduction of nitrate by zero-valent iron: Shrinking-Core versus Surface Kinetics Models
(MDPI, 2020-02-12)Zero valent iron (ZVI) is being used in permeable reactive barriers (PRB) for the removal of oxidant contaminants, from nitrate to chlorinated organics. A sound design of these barriers requires a good understanding of ... -
CO2-SR technology using NiBa unsupported catalyst. Isotopic study of cyclic process of CO2 storage and in situ regeneration with CH4
(Elsevier, 2023)The unsupported NiBa catalyst has been used in the CO2-SR (CO2 Storage and in situ Regeneration with CH4) cyclic technology, which allows the use of CO2 from combustion and CH4 from biogas in order to produce enriched ... -
Combined Operando XANES and NMR and ESR Spectroscopies for the Determination of VPO Dynamic States.
(Springer, 2023-05-29)Nanoscaled-VPO (vanadium phosphate oxide) catalysts have been prepared on an alumina support with the objective of obtaining crystallites of the active phase with a high surface-to-volume ratio. Since the catalysed reaction ... -
Comparison of Cu-CHA-zeolites in the hybrid NSR-SCR catalytic system for NOx abatement in mobile sources
(MDPI, 2023-03-10)DeNOx activity in a NSR–SCR hybrid system of two copper-containing chabazite-type zeolitic catalysts was addressed. A Pt-Ba-K/Al2O3 model catalyst was used as the NSR (NOx storage and reduction) catalyst. For the SCR ... -
Deactivation of a Biomass-Derived Zirconium-Doped Phosphorus-Containing Carbon Catalyst in the Production of Dimethyl Ether from Methanol Dehydration
(ACS, 2021-08-31)Dehydration of methanol to produce dimethyl ether (DME) was studied at relatively high temperatures (400–600 °C) on biomass-derived phosphorus-containing carbon impregnated with a zirconium salt. Highly thermally stable ... -
Dissolvable Topical Formulations for Burst and Constant Delivery of Vitamin C
(American Chemical Society, 2023-03-27)Healthy skin has a high vitamin C concentration that protects against ultraviolet (UV)-induced damage, promotes wound healing, and lowers cancer risk. The present contribution describes two drug delivery systems for topical ... -
Effect of heating rate and H3PO4 as catalyst on the pyrolysis of agricultural residues
(Elsevier, 2022-11)This study reports the effect of heating rate and the addition of H3PO4 on the pyrolysis of three representative agricultural wastes of different lignocellulosic composition, namely pistachio shell, bitter orange peel, and ... -
Efficient methanol dehydration to DME and light hydrocarbons by submicrometric ZrO2-ZSM-5 fibrillar catalysts with a shell-like structure
(Elsevier, 2022-01-20)Zeolites are widely used in many applications, such as catalysis and adsorption processes. The use of these materials in a nanometric size would be of great interest for these applications, due to the better performance ...