Two types of solid adsorbents, activated carbon and zeolite 13X, were used at 80°C to remove sulfur compounds from naphtha solutions. Adsorption isotherms have been determined in a pressure vessel. This investigation indicated that activated carbon is superior to zeolite 13X at such high temperatures. A new formula based on the Langmuir model has been found to fit the experimental data satisfactorily. Comparison of the findings of this study with those of a previous one conducted at ambient temperatures in this department indicates that such treatment generally gives better results at low temperature where almost complete recovery of the sulfur compounds can be performed by using zeolite 13X.
Removal of sulfur compounds from naphtha solutions has been investigated by using adsorption methods. Activated carbon, zeolite 5A, and zeolite 13X were used for this purpose. Zeolite 13X has shown higher capacity for sulfur at low concentration ranges. At higher ranges the capacity of activated carbon is 3 times greater than that of 13X zeolite at 20 °C. Zeolite 5A was unfavorable for sulfur sorption from naphtha. A correlation is developed to fit the experimental data. Agreement is reasonably good.
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