Mass Spectrometric Analysis EXPERIMENTAL RESULTS Anaerobic Oxidation of n-Butane over the Labeled (VO)2P207 74 Oxidation of Carbonaceous Deposits 77 Alternate n-Butane/'®02 Pulses over the Labeled (VO)2P207 77 Anaerobic Oxidation of 1-Butene over the Labeled (V0)2P207 81 Alternate l-Butene/"'02 Pulses over the Labeled (V0)2P207 84 Chemisorption of Oxygen 84 DISCUSSION 87 iv Catalyst Structure 87 Reaction Pathways 87 Participation of Bulk Oxygen 93 CONCLUSIONS 97 REFERENCES 98 PAPER III. NONSELECTIVE PATHWAYS IN THE OXIDATION OF C4 HYDROCARBON OVER B-(VO)2P207 CATALYST 100