PDF Publication Title:
Text from PDF Page: 170
reversible. The XPS spectra are shown in Figure 10; and the 2p3/2 binding energy (in eV) for these compounds, and some other reference compounds are given in Table 3. It was not our intention in this work to determine the oxidation state of the cobalt in these complexes. Rather, we wanted to look at the XPS binding energy shift in order to determine differences in the electronic nature of the central cobalt that may be attributed to binding of the cobalt at the axial position to the substrate (in this case, X zeolite). The 2p3/2 binding energy for Co in CoCl2 and Co-LSX were the same at 784.5 eV. That of the Co(fluomine) was 780.5 eV that is very similar to that measured previously for Co(salen) at 780.0 eV.30 The 2p3/2 binding energy for Co in Co(fluomine)-LSX was 782.0 eV that is between that of Co-LSX and the free Co(fluomine). This difference may be an indication of binding of the cobalt center of the Co(fluomine) to framework oxygen in the zeolite. Stability Testing. The most prohibitive problem facing the commercialization of Co(salen), Co(fluomine), and other O2-binding complexes has been the chemical instability due to autoxidation. Three general mechanism may be involved in the autoxidation of the oxygen carrying complexes: (i) dimerization of the complex, (ii) irreversible oxidation of the ligand, and/or (iii) irreversible oxidation of the central coordinating Co atom.2 The samples were found to be very stable to exposure to atmospheric moisture. There was no noticeable decrease in the binding capacity after exposure to atmospheric oxygen and moisture. In order to test the stability to repeated oxygenation and deoxygenationm the samples were subjected to an aggressive stability test. Each of the samples was subjected to oxygenation and deoxygenation cycles in a thermogravimetric analyzer (TGA). The samples were first activated by heating to 120 C in a pure Ar atmosphere. 170PDF Image | PSA USING SUPERIOR ADSORBENTS
PDF Search Title:
PSA USING SUPERIOR ADSORBENTSOriginal File Name Searched:
789503.pdfDIY PDF Search: Google It | Yahoo | Bing
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)