I was wondering if anyone has had any experience using membrane style
nitrogen generators to run their NMR lab on. We are currently exploring
options to replace our house air compressor, hopefully with a reasonably
affordable source of dry nitrogen gas. One of the possibilities is a
compressor-N2 membrane diffusion system which produces a gas stream of
up to 99.9% N2 with a dew point of -100F or better. The system we are
interested in evaluating is made by Air Liquide (FLOXAL M752C N2 generation
system) and is able to produce ca. 600 scfh at 99.9% purity.
I would be very interested in hearing from anyone who has either used such
a system or could put me in touch with someone who has one. Our lab current-
ly has an Inova 500, a CMX400 solids machine and a Bruker AMX300. The solids
machine is of course the biggest gas hog and is also the one which routinely
requires low temp. I would be willing to post a summary of responces if the
group is interested. I would also be interested in finding out what other
labs use for extended low temperature (10 + days at -65 to -150) gas sources.
For us at the moment liquid nitrogen is 75 cents /Liter.
Thanks,
Greg
-- Gregory L. Helms, Ph.D. Manager, Center for NMR Spectroscopy Washington State University PO Box 644630 Pullman, WA 99164-4630(509) 335-3005 Voice (509) 335-9688 FAX greg_helms@wsu.edu