Nitrogen carbon dioxide fluxe

In Chapter 18, Matsuyama and Teramoto report the preparation of new types of cation-exchange membranes by grafting acrylic acid and methacrylic acid to substrates, such as microporous polyethylene, polytetrafluoroethylene, and poly[l-(trimethylsilyl)-l-propyne], by use of a plasma graft polymerization technique. Various monoprotonated amines are immobilized by electrostatic forces in the ion-exchange membranes and used as carriers for carbon dioxide. With these membrane systems carbon dioxide/nitrogen selectivities of greater than 4700 are obtained with high carbon dioxide flux. 

For our first multicomponent flux calculation we ask you to calculate the fluxes for the ternary system hydrogen (l)-nitrogen (2)-carbon dioxide (3) under the following conditions ... 

Let us illustrate the calculation of the effective diffusivity and the molar fluxes for the conditions existing at the start of the two bulb diffusion cell experiment of Duncan and Toor discussed in Examples 5.3.1 and 5.4.1. The components are hydrogen (1), nitrogen (2), and carbon dioxide (3) and the values of the diffusion coefficients of the three binary pairs at 35.2° C and 1-atm pressure were... 

The Sandia aluminosilicate zeolite membranes have fluxes on the order of 10-6 mole/mole per meter squared Pascal secont (flux unit) (m Pa sec) and pure gas separations of H2/N2 >61, H2/CO2 >80, H2/ CH4 =7, CH4/CO2 >11. H2 (hydrogen), N2 (diatomic nitrogen),C02 (carbon dioxide), CH4 (methane). 

Cadmium(II) transport, over Hg(II) and Zn(II). 102-104 Carbon dioxide facilitated transport, 111 separated from nitrogen in ILMs, 146,150 Carbon monoxide facilitated transport, 112 reversible binding, 30-32 Carboxylate ionophore antibiotics, metal ion transport, 86 Carrier molecule effect on solute flux, 4 function in facilitated transport, 124 Carrier-facilitated transport—... 

For consolidated media such as concrete, sandstone, the Knudsen flux equation such as eq. (7.4-27b) or (7.4-28) can be used. Ash and Grove (1960) studied the flow of inert gases, hydrogen, nitrogen, oxygen, ethane, carbon dioxide and sulfur dioxide through a porous porcelian ceramic and found that for pressures less than 20 Torr the flow is described well by the Knudsen equation. 

B and C. Explore and plan. The permeabilities of carbon dioxide and nitrogen for this membrane are listed in Table 17-2. The selectivity, a, is the ratio of these permeabilities. The value of yr,co2 be found from the RT Eq. tl7-6ai. The CO2 flux and Fp can be calculated from Eq. (17-2). The cut and Fjjj can then be determined from mass balances, Eqs. (17-7). 

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