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*Columna de absorción: Balance de materia: Problema 2....Parte I
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*Columna de absorción: Balance de materia: Problema 2....Parte I

Music

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Understanding the Process of Cleaning Contaminated Air

  • The process involves cleaning contaminated air with CO2 by using CO2-free water.
  • Operating at 30 degrees Celsius and 1.3 atmospheres, a packed column works in an isothermal manner.
  • A mixture of air and SO2 is fed into the base of the column.
  • Gas exiting should not exceed 11.7 milligrams of A per liter.
  • The system follows Henry's Law, with specific molecular weights provided for various components.

Calculations and Unit Conversions

  • Density calculations are based on molecular weights and specific gravities.
  • Determining the percentage of SO2 removed involves understanding transferred and untransferred components.
  • Homogenizing units is crucial for molar gas phase calculations.
  • Calculations involve determining partial pressures using total pressure values.

Conversion to Mass Units

  • Converting pressure values to millimeters of mercury aids in further calculations.
  • Establishing relationships between densities and fractions simplifies computations.

Chemical Engineering Calculations

In this section, the speaker delves into chemical engineering calculations involving density, molecular weight, and concentration conversions.

Converting Density to Mole

  • Density to mass conversion: 2g equals 0.117 kg/m^3.
  • Further conversion: 1.828/10^-4 kmol of methanol equals the total density.

Concentration Conversion

  • Concentration calculation: The total concentration is determined as 3.495 x 10^-3.
  • Relationship between concentrations: Discusses the relationship between different concentrations using various notations like roge2 and cg2.

Calculating Liquid Composition

This part focuses on determining the composition of a liquid mixture leaving a column in terms of weight percentage.

Liquid Composition Calculation

  • Initial setup: Setting up the calculation for finding the composition in weight percentage.
  • Material balance: Explaining the material balance for a absorption column where concentration is lower at the bottom.
  • Solving for x_a1/x_a1: Demonstrates how to solve for x_a1/x_a1 by manipulating equations.

Further Calculations and Formulas

Continuing with calculations involving molecular weights and fractions in chemical engineering contexts.

Molecular Weight Calculation

  • Molecular weight computation: Detailed steps on calculating molecular weights for specific substances involved in the process.
  • Utilizing values: Using calculated values to determine x_a1/x_a ratio for further analysis.

Fractional Analysis

  • Fractional analysis application: Applying fractional analysis to determine liquid phase composition percentages.
Video description

En una refinería se requiere limpiar el aire contaminado con SO2 para lo que se emplea agua libre de SO2, los fluidos se ponen en contacto en una columna empacada con los flujos en arreglo en contracorriente. La columna trabaja en forma isotérmica a 30ºC e isobáricamente a 1.3 atmosferas. Por la base de la columna se alimenta una mezcla de aire- SO2 a razón 514.61 kg/h y con una presión parcial del SO2 de 91.2 mm Hg. A la salida el gas no debe contener más de 11.7 mg/L. Por el domo de la columna se alimenta un gasto tal de agua que cada kilogramo de SO2 se recupera con 1.66 kg de agua. El sistema sigue la Ley de Henry, donde la constante es de 0.548 atm/fracción mol. Los pesos moleculares son: 64 para el SO2, 18 para el agua y 29 para el aire. La gravedad específica de la solución acuosa a cualquier concentración se puede considerar de 0.981. Determinar * El porciento SO2 no removido con respecto del alimentado. * Composición de SO2 en el líquido que sale, expresado en porciento peso.