Recent content by sero2000

Hmm i looked at a study that showed that concentration of furfural was done using membranes with rejection of furfural of over 92%. However, it also showed that acetic acid (by product) also was rejected at around 70%. And in another study when they increased the trans-membrane pressure the...

hmm so you're suggesting we focus on the reaction process instead?

Hi there, My group is working on a final semester project that involves the design of a small fufural (C5H4O2) plant. Pretty much most commercial processes uses distillation after the reaction process and then it is further distilled to purify the fufural which results in a costly process...

Is there a reason we use the saturated aqueous salt solution density? Does it have something to do with the interface? My notes don't really say much about all these. It just mentions use properties at the film density. I borrowed a textbook from the library but it does not explain much as...

Hi there, thanks!. Another question though, for the grashof number, I am given the formula as Gr = [g ( Densitybulk - Densitysurface)]/film density x Kinematic viscosity. So I found the density of the bulk which is 1000kg/m^3 and the density of the surface layer which is 2156kg/m^3. For the...

Homework Statement What is the mass transfer coefficient for natural convection from rock salt (assume flow is over a horizontal cylinder (salt crystal) of length 2cm, diameter 0.5cm). Given: Temperature = 24degrees Density of salt 2165kg/m^3 Density of mixture when salt...

Hi there! I did some researching again and found this http://chemistry.illinoisstate.edu/standard/che360/handouts/360gibbshelmholtz.pdf of which the last example has the same results as what I have but however, I can't seem to understand it. From the top of the file, it states that dG = -Sdt...

I calculated some gibbs free energy values for a chemical reaction at 298K and 1773K both giving me negative values . the amount for the reaction at 298K is -162443J and the one at 1773K is -81147.85J. Both shows that the reaction are spontaneous and so thermodynamically the process at 298K is...

Yup i managed to get the general solution! y(t) = 7/2 Cos(2t) + C1 Cos (*sqre root 14/3* t) + C2 Sin (*sqre root 14/3*) Still can't find what is resonant though. does it have something to do with the sine waves?

The displacement y(t) of a driven mass-spring system is described by the differential equation 3y" + 14y =7cos(2t) with initial value conditions y(0) = 0, y' (0) = 0 a.) is this system damped or un-damped? b.) Is this system resonant? c.) Write the solution to the IVP in terms of a product...

Oh ok i get it! so It's just integration of the Cp formula for TiCl4 with T2 at 600 degrees and T1 at standard temp and i do the same for TiO2 except instead of 600 i use 1500 then i find the difference.

Homework Statement A chlorinator operates at twice the pressure of the Cl2 recovery stream. To recycle the Cl2, it has to be compressed. Whats the minimium energy consumption of the compressor (per mol of Cl2) if it leaves the recovery stream at 100 Degrees. Assume isentropic and Q = 0 Cp =...

Homework Statement If a feed of TiCl4 and O2 at 600 degrees is fed into a reactor and the product is 1500 degrees, how much heat is added or removed? Homework Equations Cp = A + BT + C/T^2 + DT^2 The Attempt at a Solution I managed to find the heat of reaction for the whole...

ALRIGHT I managed to understand now. THANKS!

Homework Statement I am given the following chemical eqn TiCl4(g) + O2 → TiO2 (s) + 2Cl2 I am also given some values on the heat of formation and the entropy of the substances but however only at 300Kelvin and i am given some values and the formula to calculate Cp of the substances The...