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Videos de Conceptos Relacionados

Catalysis02:50

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Microbial Fuel Cells01:23

Microbial Fuel Cells

Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...
Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
Gas Chromatography: Introduction01:13

Gas Chromatography: Introduction

Gas chromatography (GC) is a technique for separating and analyzing volatile compounds in a sample. Its primary purpose is to identify and quantify components in complex mixtures, making it essential in fields such as environmental analysis, pharmaceuticals, and petrochemicals. GC is also called vapor-phase chromatography (VPC) or gas-liquid partition chromatography (GLPC).
In GC,  a sample is vaporized and mixed with an inert carrier gas (the mobile phase), which transports it through a column.
Turnover Number and Catalytic Efficiency01:19

Turnover Number and Catalytic Efficiency

The turnover number of an enzyme is the maximum number of substrate molecules it can transform per unit time. Turnover numbers for most enzymes range from 1 to 1000 molecules per second. Catalase has the known highest turnover number, capable of converting up to 2.8×106 molecules of hydrogen peroxide into water and oxygen per second. Lysozyme has the lowest known turnover number of half a molecule per second.
Chymotrypsin is a pancreatic enzyme that breaks down proteins during digestion. The...

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Video Experimental Relacionado

Updated: Jul 11, 2026

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization
09:46

Reducing Willow Wood Fuel Emission by Low Temperature Microwave Assisted Hydrothermal Carbonization

Published on: May 19, 2019

Gasificación catalítica del carbón: una tecnología emergente.

R L Hirsch, J E Gallagher, R R Lessard

    Science (New York, N.Y.)
    |January 8, 1982
    PubMed
    Resumen

    La gasificación catalítica de carbón utiliza un catalizador de potasio para una producción eficiente de metano. Este proceso recicla el monóxido de carbono y el hidrógeno, con una planta piloto planeada para la preparación comercial.

    Área de la Ciencia:

    • Ingeniería Química Ingeniería Química.
    • La catálisis de la catálisis.
    • Producción de energía Producción de energía.

    Sus antecedentes:

    • La gasificación del carbón es una tecnología clave para convertir el carbón en productos valiosos.
    • Los métodos tradicionales se enfrentan a desafíos de eficiencia y costo.

    Objetivo del estudio:

    • Desarrollar un método más eficiente y rentable para producir metano a partir del carbón.
    • Para integrar las reacciones endotérmicas y exotérmicas en un solo reactor utilizando un catalizador.

    Principales métodos:

    • Utilizando un catalizador de potasio para permitir el control de la reacción a una sola temperatura.
    • Implementar el reciclaje continuo del monóxido de carbono y el hidrógeno después de la separación del metano.

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    Principales resultados:

    • Demostró una ejecución continua de 23 días en una unidad de desarrollo de procesos.
    • Se logró una tasa de alimentación de carbón de 1 tonelada por día.

    Conclusiones:

    • La gasificación catalítica de carbón muestra un progreso constante desde 1971.
    • La tecnología está progresando hacia la preparación comercial con una planta piloto planeada.