Decomposition of GD on CeO2/Alumina Adsorbents in a Gas Chromatograph On-Column Injector Tube Reactor

The decomposition of GD on alumina supported CeO2 was determined at 25 degrees C in a quasi micro-reactor. One microliter of GD solution (50% by weight in carbon tetrachioride) was injected into a CeO2/alumina (-40 mg) packed inlet tube of a Perkin Elmer Auto M Gas Chromatograph and maintained at 30 degrees C. A Nicolet 800 Bench Spectrometer with a mercury cadmium-telluride detector (11,700 to 600 /cm) was used to monitor the effluent. An injection was made approximately every hour until GD was detected. The adsorbent was then extracted with acetonitrile and the solution treated with BSTFA to esterify any hydrolysate; the mixture was assayed by GC/MS. The GD (521 micromol/g) was decomposed on CeO2/alumina; the major products were pinacolyl methylphosphonic acid, methyl phosphonic acid, and dipinacolyl methylphosphonate. The decomposition of GD on alumina supported CeO2 was determined at 25 degrees C in a quasi micro-reactor. One microliter of GD solution (50% by weight in carbon tetrachioride) was injected into a CeO2/alumina % 40 mg) packed inlet tube of a Perkin Elmer Auto M Gas Chromatograph and maintained at 30 degrees C. A Nicolet 800 Bench Spectrometer with a mercury cadmium-telluride detector (11,700 to 600 cm(exp -1) was used to monitor the effluent. An injection was made approximately every hour until GD was detected. The adsorbent was then extracted with acetonitrile and the solution treated with BSTFA to esterify any hydrolysate; the mixture was assayed by GC/MS. The GD (521 umo1/g) was decomposed on CeO2/alumina; the major products were pinacolyl methylphosphonic acid, methyl phosphonic acid, and dipinacolyl methylphosphonate.