Adsorption Desulfurization Of Iraqi Heavy Naphtha Using Zeolite 13x

This work was conducted to study the effect of selective adsorption on removal of sulfur compounds from Iraqi heavy naphtha from Al-Dura refinery by using molecular sieve (13X) in a fixed-bed column and it was be run out at 1.5–6.0h-1 LHSV, 15–30 gr weight of molecular sieve (13X), 600–1650ppm sulfur concentration in the feedstock , the adsorption temperature was 25C and 40C. The best operating conditions for removing sulfur compounds was 3.0 h-1 LHSV, 20 gr molecular sieve bed weight and 25C temperature, where the sulfur content in heavy naphtha was reduced from nearly 600 ppm to less than 1 ppm (by weight). Regeneration steps was thermally took place by hot air flow in a range from 16.66 – 25 liter / min and temperature range from 200–350C, the best desorption conditions for (85.8%) weight percent removing was at 16.66 liter / min air flow and 350 C. Keywords— Adsorption, heavy naphtha, molecular sieve 13X; fixed bed, regeneration.