How to make phase pure Lithium zeolite, and Li,K-Mixed zeolite?

I have an adsorption-desorption isotherm of N2 from a sample (modified zeolite). According to the IUPAC classification it is type II, it can also be seen that there is a different behavior of the adsorption curve with desorption, so it can be assumed as the presence of a hysteresis loop, which resembles the type H3; however it is seen that the adsorption and desorption branch doesn't close even at low pressures. What is this phenomenon due to? Is the assumption regarding the type of isotherm correct?

Could you recommend me some article about it. Thank you very much!

I am studying a type of air conditioning based on air drying with silica gel, in order to have dry air that, after saturation by injecting water, has the right temperature and humidity (say, 14 C and 100% humidity) to be fed to a conditioned room..

No cooling required by refrigeration. Het would be consumed to regenerate silica gel.

(My sensation is that the heat required to regenerate silica gel is lower than the heat consumed in power stations to produce the power required by a conventional air conditioner.)

I am attempting to study the thermal stability of a polymer sample(regenerated cellulose) before and after exposing it to radiation. I've attached the TGA graph for both. 

After treatment the initial  decomposition temp decreases as expected as radiation could have lead to degradation of some bonds, now my doubts are :

1) Three degradation peaks are seen in both graphs, however after radiation there is a change in peak height for all three what does a change in peak height indicate? In my understanding it shows the amount of material being decomposed at that temp, is that it? If yes, does the smaller peak height after radiation indicate that some bonds were boken during radiation leading to less being left over to decompose?

2) The TGA for after radiation sample shows a lower initial decomposition temp but also a higher final decomposition temp than the before sample, I'm confused as to whether this means after radiation the sample become less thermally stable or more?

I am a beginner with these characterization technique so there is a lot I could have missed form the graph so apart from my questions,  any other advice on the graph is much appreciated.

Thank you.

How much is the nitrogen absorptivity of Lithium cationic zeolite at normal pressure and temperature?

I have generated force field parameters for solvents using AmberTools and adopted force field parameters for a lithium salt from a published paper. How can I effectively combine these two sets of parameters? Previously, I attempted to use Moltemplate to combine the parameters, but it did not work for the lithium salt.

thank you

Nowadays it is very difficult to buy ammonium nitrate (NH4)(NO3) for ion exchange in zeolites because of safety issue.

Which salt we can use for Ion exchange instead of Ammonium nitrate?

Does Ammonium sulfate or ammonium carbonate could be use?

If yes, please tell me which one is better for ion exchange?

Will these salts have any effect the acidity of catalyst?

Note: I have to Exchange of Na+ with NH4+

Your answer will be highly appreciated.

Hello,

I´m working on the Ion chromatography in anion mode detecting Lithium salts in product. In time I´m observing that the peak height of analyte is continuously increasing even though the sample % concentration is still the same. Can anyone help me and explain why is this happening?

Example of peak heights vs. concentration of one Li salt at different measurements in one week.

23 - 12.00 %

24.5 - 12.00 %

25 - 12.00 %

26.3 - 12.00 %

It used to be the same height for the same concentrations but past few days we are observing this phenomena.

Thank you for your help.

Please tell me which device is better to choose for fabrication of polymer films (for dry electrolytes) based on PEO and lithium salt by means of hot press technology? I need it for lab experiments. What features should it have? Thanks in advance!

Hi, first of all my presentation: I'm a PhD student from University of Turin, I'm working on the study of new materials for Li-ion cells.

In particular in this period I am involved in studying the Li-ion cell with a reverse approach.

Starting from an entire cell I'm trying to collect more information I can about the materials used in.

My question is: what is the best technique to collect the electrolyte (solvent + Lithium salt) and to analyze it?

Moreover, how can I separate the salt form the electrolyte to be sure not to create a danger in the chromatrographic setup?

Thanks in advance.