but I would need it for hydrogenation.
Here is a summary of my experiences with hydrogenation, to be honest I'm really not sure about hydrogen absorption, certainly in a quantitative sense, but here goes... hopefully this is useful.
Ok, for hydrogenation/hydrogenolysis reactions I personally usually use ethanol most of the time. Methanol is also good, but if you have amine functionality you can get reductive amination with traces of formaldehyde in the methanol (ie you methylate the N).
Another good solvent for hydrogenation in my experience is water.
In my experience, THF is also a very good hydrogenation/hydrogenolysis solvent. Ethyl acetate and dioxane usually give very slow hydrogenolysis of benzyl groups in particular, these would be solvents I'd screen if I wanted to say, reduce an azide in the presence of benzyl ethers.
Another point to make is that aliphatic amines can poison the catalyst (I would normally use Pd on C, Pd black, palladium hydroxide or platinum oxide catalysts) and to overcome this you can add an acid, aq HCl works well, or use acetic acid as the solvent.