Explain what is effective diffusion coefficient of ch4

Assignment Help Chemistry

Reference no: EM13155261

"24.22 Researchers are proposing the development of a ‘‘nano- channel reactor'' for steam reforming of methane (CH4) to fuel- cell hydrogen gas to power microscale devices. Gas phase diffusion in nanochannel A = CH4, B= H2O A+B 20 mol% CH 4 -----------------------------> Nanochannel ( NA/NB) = 0.25 300 degrees C, 0.5 atm, 200Nm diameter As each channel diameter is so small, the gas flow is likely to be very small within a given channel. Hence, gas diffusion pro- cesses may play a role in the operation of this device, particularly during the mixing and heating steps. We are specifically inter- ested in evaluating the effective diffusion coefficient of methane gas (species A, MA 1?4 16g/g: mol) in water vapor (species B, MB 1?4 18 g/g: mol) at 3008C and 0.5 atm total system pressure. The diameter of the channel is 200nm (1x 10^9 nm = 10m) A feed gas containing 20 mol % CH4 in water vapor is fed to the nanochannel with a flux ratio NA/NB = 0:25. What is effective diffusion coefficient of CH4 in the nanochannel at the feed gas conditions? Is Knudsen diffusion important?

Reference no: EM13155261

Questions Cloud

Meaning of dupont model : Describe the meaning of the DuPont Model of the return on investment (ROI) calculation.

Lease liability and balance sheet : Assuming the present value of an annuity due of 1 for 6 years at 10 percent is 4.7908 and the present value of an annuity due of 1 for 6 years at 12 percent is 4.6048, what is the lease liability that Stockton should report on the balance sheet at..

Calculate the temperature change : Calculate the temperature change which will be caused by the following process: 0.640 moles of NH4Cl are dissolved in 1.00 L of water.

Composite sampling is a way to reduce laboratory : Composite sampling is a way to reduce laboratory testing costs. A public health department is testing for possible fecal contamination in public swimming pools

Explain what is effective diffusion coefficient of ch4 : What is effective diffusion coefficient of CH4 in the nanochannel at the feed gas conditions? Is Knudsen diffusion important?

What is the new pressure in the bicycle tire : A bicycle tire is filled with air to a pressure of 85.0 psi at a temperature of 19°C. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58°C. The volume of the tire increases by 2.8%. What is the new pressure in the ..

Causal claim about popular culture and identity : I'm going crazy trying to figure out how to get this assignment done for English 102. It is supposed to be about popular culture & identity,

Interest revenue should baxter record : Assume that the present value at January 1, 2002, of all rent payments over the lease term discounted at a 10 percent interest rate was $5,280,000. What amount of interest revenue should Baxter record in 2003 (the second year of the lease period) ..

Calculate p-value by comparing gpa for chosen students : Do a two-sample test for equality of means assuming equal variances. Calculate the p-value. Comparison of GPA for randomly chosen college juniors and seniors: ¯ x1 = 3.05, s1 = .20, n1 = 15, ¯ x2 = 3.25, s2 = .30, n2 = 15, α = .025, left-tailed t..

User Account

All Pages