Natural Gas Condensates as Steam-cracker Feedstocks

The presence of mercury in natural gas has been detected in numerous fields for many years. Mercury found in natural gas is generally in metallic form and its concentration varies from 1 to 75pgNm Natural gas associated condensates are very different First the mercury found in condensates is present in various chemical states elementary, ionic and organometallic second, arsenic is often simultaneously present third, the concentration ranges of mercury and arsenic are generally and, respectively, in the ranges of 10 to 3000 ppb and 10 to 150 ppb. The distribution of mercury and arsenic for an Asian condensate is shown in Fig. 18.30. For this particulate condensate, the large majority of mercury is found in the C3 and C fractions, whereas, arsenic was almost exclusively found in the residue. 

Contaminant Repartition in the Feedstock As the steam-cracker is producing a 

---