Which is the best flocculant I can use for sludge containing iron?

I have tried anionic polymeric flocculant which works well but is extremely costly. I am exploring other cost-effective options. Thanks!

04 May 2019 5,858 3 View

Does the heat transfer coefficient increase during coupled mass transfer? Is there any correlation which accounts for such a correction?

Standard Hausen's correlation for Nusselt number predicts heat transfer coefficient which are found to be lower than those measured experimentally in a pervaporation process. What could be the...

05 June 2018 1,358 3 View

Can there be an order of magnitude or higher difference between in-plane and through-plane thermal conductivity of a porous polymeric matrix?

08 September 2017 1,806 6 View

What is the effect of temperature on water content of Nafion at 100 % RH?

05 June 2017 999 2 View

How is effective diffusivity in membranes related with the density ratio of membrane and the diffusing species?

What is the physical significance of introducing density ratio in estimation of effective diffusivity in membranes?

05 June 2016 4,830 2 View

Are the heat and mass transfer coefficients co-dependent on each other in a combined heat and mass transfer phenomenon such as humidification?

In a typical shell and tube membrane humidifier module, heat and moisture are exchanged between the wet and dry fluids flowing on either side of the membrane. Now, is there a correlation that...

11 December 2015 8,378 8 View

What is the minimum temperature attainable through passive cooling in an 'enclosed space'? Wet bulb temperature or dew point?

Say for example, A Zeer Pot system undergoes cooling due to evaporation of water. Now what would be the minimum temperature at the center of the Pot considering the top and bottom are perfectly...

03 April 2015 2,815 3 View

What theoretical or experimental techniques can be used to determine the different kinds of overpotentials in PEM fuel cells?

I have already carried out polarization studies and electrochemical impedance measurements but the trends obtained from both techniques do not match. Could there be another method which could give...

01 February 2015 432 3 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

How to get/count refractive index in gasses?

20 February 2021 8,202 6 View

How to make Fast Green FCF from powder?

Hi everyone We need Fast Green to electroporate plasmid into mice embryos, therefore we simply need it to see some color in the liquid we are electroporating so that electroporation is more...

07 February 2021 1,671 2 View

Which is the best software for the simulation of tribological properties of materials?

I want to simulate the tribological properties of solids, liquids, and fluids, please suggest good software.

02 February 2021 3,947 3 View

Does anybody work with CoolLED in fluorescence microscopy?

I have trouble with exciting wavelengths higher than 460 nm while e.g. ex with 405 nm works. Filtercubes are correc, as I used them with my old xenon lamp before... I work on axiovert200M and with...

25 January 2021 5,201 2 View

How to prepare a liquid sample for FTIR spectrum?

I have a ethanol-water 50% extract of mango peel. I purified mangiferin from the extract with filtration and precipitation. so i obtained a low concentrated extract which i want to se the IR...

24 January 2021 8,880 7 View

Why high voltage and current (and some gases) Cause Spray-mode metal transfer in Gas-Metal Arc Welding (GMAW)?

This transition phenomena of Globular to spray mode as voltage , and especially current is raised, is very commonly known to Manual Metal Arc Welding (MMAW) and Gas-Metal Arc Welding (GMAW)...

20 January 2021 7,984 2 View

Can you have pressure inlet and velocity inlet at the same time?

I was reading a reference (Reitz-A Photographic Study of Flash Boiling Atomization). In his experiment, his boundary condition is delta p and constant velocity. The liquid injection pressure was...

18 January 2021 842 9 View

How can you confirm new liquid FTIR cell fits calibration?

We have an FTIR instrument which was calibrated in transmission/absorption mode using a set of cells for different ranges of D2O concentration. One of the cells at high range broke and the new one...

16 January 2021 4,791 2 View

Where can I find these two papers?

14 January 2021 1,572 3 View