Photocatalytic Cracking of n – Hexacosane ( n- C26H54 ) Using Zinc Oxide Sensitized and Visible Light

Algabury, H.Y.; M.AL-Hachamii, Mouhannad; A.Al-Fatlawy,

	Photocatalytic Cracking of n – Hexacosane ( n- C26H54 ) Using Zinc Oxide Sensitized and Visible Light
journal of al-qadisiyah for pure science(quarterly)
Article 1, Volume 7, Issue 3, 2007, Pages 199-215 PDF (0 K)
Authors
H.Y. Algabury; Mouhannad M.AL-Hachamii;
Abstract
The photodegradation of n-hexacosane (n- C26H54) by sensitized zinc oxide was investigated. The zinc oxide was modified by different weight of crystal violet (0.1, 0.2, 0-3, 0-4, 0.5, 0.6, 0.7 and 0.8) gm using a Pyrex state reactor 25 cm3 irradiated with modified immersion halogenated lamp ( 400 -700 ) nm. at 298 K with air flow. The photodegradation of n-hexacosane using sensitized ZnO, which is achieved by the irradiation of suspended solution consists of 0.01 mole n-hexacosane dissolved in 25 cm3 of n-nonane with 0.12 gm of sensitized ZnO by visible light from external source through a side window of quartz inside a Pyrex photo reaction cell of 25 cm3 at 298 K. Several experiments were carried out at various conditions to attain the best degradation of n-hexacosane using sensitized ZnO. These experiments include the amount of dye on fixed mass of ZnO, the amount of sensitized ZnO, the size of its particles, the flow rate of air flow in the reaction cell, the temperature effects and the time of irradiation. The main photolytic products of n-hexacosane photodegradation processes were heptane, octane, nonane, dodecane and tetradecane. Gas chromatographic using FID and IR spectrophotometric techniques were used to identify the photocalalytic degradation products. Also the sensitized ZnO and dye were studied by using X-Ray Diffract ion spectrometric technique. According to the obtained results a reaction mechanism of the photodegradation processes of n-hexacosane by sensitized ZnO was suggested.

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