Thesis (M.Eng.)--Chulalongkorn University, 1998

Removal of arsenic and mercury compounds from liquid hydrocarbon was investigated. The experiments were conducted at atmospheric pressure and at temperatures of 30ํC, 50ํC and 70ํC. Mercuric chloride, diphenylmercury, arsenic oxide and phenylarsine oxide are used to represent ionic mercury, organic mercury, ionic arsenic and organic arsenic. Arsenic and mercury compounds were dissolved in toluene to obtain solutions containing 10 ppm of arsenic and 1 ppm of mercury. The adsorbents were alumina, nickel oxide on alumina, copper oxide on alumina, and nickel copper on alumina prepared dry impregnation techniques. The results showed that removal of arsenic and mercury compounds dependended on temperature. Adsorption efficiency of adsorbents for removal of both mercury and arsenic compounds increases in the following order: copper > nickel > alumina. Mercuric chloride can be removed more efficiency than diphenylmercury. Phenylarsine oxide is adsorbed on copper and formed copper arsenide