Question

A gaseous mixture of Helium and Hydrogen contain 20% H2. The number of diffusion stages required if H2 is to be enriched from 20% to 80% by means of gaseous diffusion are​

Answer 1

Answer:

The production of cheap membranes for CO2 gas separation purposes is of primary importance for the realization of carbon capture and sequestration technologies (He et al., 2009; He and Hägg, 2011, 2012). One of the important applications of membranes is to separate CO2 from a mixture of gases (Bernardo et al., 2009). Pressure swing adsorption (PSA) is one of the most common techniques to capture CO2 from a mixture of CO2 and H2. This process requires large pressures, being different in the adsorption and desorption steps (Bernardo et al., 2009). In the adsorption step, CO2 absorbs strongly into the carbon material at high pressure. Then in the later step, CO2 desorbs at a much lower pressure. The energy costs depend on the manner this is performed; in one or more steps, with or without heat integrated. By using a molecular sieve membrane the separation can be performed as a continuous process, where the CO2