Photo-degradation Effect on Naphtha Octane Number by Using UV Radiation

In this work naphtha is exposed to ultraviolet rays under various conditions namely; UV exposureonly, exposure with cooling, cooling and catalyst, Cooling,Catalyst Oxidant O2 Catalyst investigate the bondscracking process (Photo-degradation or photolysis reactions) its effect on octane numberwhere several bonds are be broken due absorption high energy of radiation. It expectedthat number should changed as a result Photo-degradation effect. Samples areprepared treated in Reactor unit prevailing pressure (elevatedpressure). No systematic change noticed but either decreasesor remains constant. Another technique which cell used. prepared inthe atmosphere pressure. Three different behaviors octanenumber resulted (decreasing, no increasing). Maximum decreasing is(-11 unit) occurred when & TiO2 catalyst ,while maximum increasing (5.6 ZnOcatalyst (2.1 ml/min) feeding unit. order understand behavior Gaschromatography Mass Spectrometry (GCMS) tests conducted for some samples before afterUV study changes chemical composition specially inpercentage compounds that affect such as: Benzene, Toluene, Isooctane Pxylene.It percentages these increased anddecreased others. Also Fourier Transform Infrared spectroscopy (FTIR) thesesamples after find eliminated created functional groupsof bonds.