PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGEN

PDF Publication Title:

PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGEN ( pressure-swing-adsorption-forpurification-hydrogen )

Previous Page View | Next Page View | Return to Search List

Text from PDF Page: 033

specify some parameters (see Appendix 2). This model comprises a number of models whose equations are described below. 3.2.2 Mass balance In describing these equations it is assumed that the mass transfer driving force is on a coverage basis instead of on a concentration or partial pressure basis. solid (3.1) (3.2) (3.3) (3.4) The continuity equation for each species in the fluid phase is given by: 𝜀 𝜕𝜌𝑥𝑖+𝜕𝜌𝑢𝑥𝑖=𝜀 𝜕(𝜌𝐷 𝜕𝑥𝑖)−𝜌 𝑀𝑊𝜔(𝑞 −𝑞) 𝑡𝑜𝑡 𝜕𝑡 𝜕𝑧 𝑏𝑒𝑑𝜕𝑧 𝑎𝑥𝜕𝑧 𝑏𝑒𝑑 𝑖 𝑖 𝑒𝑞,𝑖 𝑖 The subscript 𝑖 refers to the components in the feed mixture. For the mass balance the boundary conditions for the inlet and outlet are: 𝑖𝑛𝑙𝑒𝑡∶ 𝑜𝑢𝑡𝑙𝑒𝑡: The mass balance for the adsorbed phase is given by: 𝜕𝑞𝑖 = 𝜔𝑖(𝑞𝑒𝑞,𝑖 − 𝑞𝑖) 𝜕𝑡 3.2.3 Energy Balance Pressure Swing Adsorption for Hydrogen Purification 𝐹𝑤𝐹𝑥 𝜕𝑥 𝑖𝑛𝑖𝑛 𝑖𝑛𝑖 𝑖 𝜀 𝜌𝐷 𝜕𝑥𝑖=0 𝑏𝑒𝑑 𝑎𝑥 𝜕𝑧 𝑏𝑒𝑑 𝑎𝑥 𝐴 = 𝐴 −𝜀 𝜌𝐷 𝜕𝑧 Equation (3.5) denotes the energy balance for the bed used in the PSA simulations. 𝜕𝑈𝑏 𝜕𝑡 = 𝜀 𝑏𝑒𝑑 𝐷 𝜕 (𝜌𝜕h)−𝜕𝑢𝜌h + 𝜕 𝑎𝑥 𝜕𝑧 𝜕𝑥 𝜕𝑧 𝜕𝑧 (𝜀 𝑏𝑒𝑑 𝜆+ (1−𝜀𝑏𝑒𝑑) )𝜕𝑇 0.22𝜀𝑏𝑒𝑑2 + 2 𝜕𝑧 𝜆 3𝜆𝑎𝑑 ) (3.5) (3.6) (3.7) − 𝑘 4 (𝑇 − 𝑇 ) 𝑇,𝑏𝑤 𝑑𝑏 𝑤 For this equation, the boundary conditions are: 𝑧=0: 𝑧 = 1: 𝐹 h /𝐴=𝑢𝜌h−𝜀 𝐷 𝜌𝜕h−(𝜀 𝜆+ (1−𝜀𝑏𝑒𝑑) )𝜕𝑇 𝜕𝑇 = 0 𝜕𝑧 𝑖𝑛 𝑖𝑛 𝑏𝑒𝑑 𝑎𝑥 𝜕𝑧 𝑏𝑒𝑑 0.22𝜀𝑏𝑒𝑑2 + 𝜆 2 𝜕𝑧 3𝜆𝑎𝑑 ( Modelling Tool and Mathematical Model 13

PDF Image | PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGEN

PDF Search Title:

PRESSURE SWING ADSORPTION FOR THE PURIFICATION OF HYDROGEN

Original File Name Searched:

32541.pdf

DIY PDF Search: Google It | Yahoo | Bing

CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info

Heat Pumps CO2 ORC Heat Pump System Platform More Info

CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)