Results on a study on the filtering system used at the CERN Closed Loop recirculation gas plant currently in test at CMS experiment at the LHC are reported. This study is focused on the regeneration processes of the metals - including both oxidation and reduction reactions of Copper, Zinc and Nichel ‐ and on the thermodynamics of the regeneration reactions. This study confirms the filtering system efficiency towards the O 2 . The findings of this study allow us to propose an optimized use of the purification system.

/pdf/gas-purifiers-for-closed-loop-gas-systems-2z3fat0fps.pdf

Gas purifiers for closed-loop gas systems

Results of a study on the purifier system used at the Closed Loop recirculation gas plant of the CMS experiment at the CERN LHC are reported. Previous studies have focused the attention on pollutant and gas analyses. This study mainly deal with characterization of new, used and regenerated metallic purifiers by XRD analyses and thermodynamic simulations. The study is focused on the regeneration processes of the metals, including the reaction mechanisms of copper, zinc and nickel reduction/oxidation and confirms the purifying system efficiency towards the O2. Partial reduction of CuO to Cu2O and a not complete reduction to Cu is evident from data reported for copper based purifier. Results discussed provide a complete understanding of both filtration process and reactions implied in the system, thus preluding to optimization of regeneration procedures.

http://iopscience.iop.org/article/10.1088/1748-0221/8/08/T08004/pdf

Characterization of metallic gas purifiers used in Closed Loop gas system of the CMS RPC detector

/pdf/a-study-of-the-reduction-of-zinc-oxide-by-hydrogen-and-2lj2fd5q2z.pdf

Frederick Adam Weirich

Papers

A study of the reduction of zinc oxide by hydrogen and methane