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ABSTRACT

Elemental mercury from natural gas has increasingly become an environmental concern due to its high volatility and toxicity. Activated carbon adsorption is an effective mercury control method. Mercury content in natural gas should be removed to avoid equipment damage in the gas processing plant or the pipeline transmission system. This research describes the process of mercury removal from natural gas by coconut active carbon impregnated with ZnCl₂. Activation temperature and ZnCl₂ solution concentration are signifi - cant affect the mercury adsorption capacity. Charcoal was prepared from coconut shell and activated at 500, 700 and 900^oC in constant fl ow of nitrogen. The effect of activation temperature and ZnCl₂ concentration for mercury adsorption on adsorbent show that the adsorption ability of adsorbent is affected by increas- ing activation temperature up to an optimum temperature of 700^oC. Ability of adsorption increases with increasing ZnCl

2 concentration and mercury adsorption was optimum at 7% concentration of ZnCl

2. The results indicated that the adsorption capacity of mercury in natural gas by activated carbon-impregnated

chlor is very signifi cant. The conclusion of this paper is that optimum activation temperature 700^oC and 7% ZnCl₂ impregnated on adsorbent can improve the mercury adsorption in natural gas.

.H\ZRUGVactivation, mercury adsorption, natural gas, activated coconut carbon

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