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The main data on the average concentrations of mercury in coal and petroleum from Russian and foreign fields and the results of studies on mercury speciation in solid and liquid fossil fuels are summarized. According to various estimates, the average mercury contents of petroleum and coal vary over the ranges from 0.001 to 2 and from 0.05 to 0.3 g/t, respectively. Factors responsible for the wide range of estimated mercury contents of petroleum are considered. As judged from average concentrations, coal and petroleum considerably concentrate mercury, as compared with sedimentary rocks and the earth’s crust. The distribution of mercury upon coal preparation, combustion, and gasification (coking); oil fractionation; and the combustion of coke and fuel oil is demonstrated. Upon petrochemical processing, mercury is mainly concentrated in heavy fractions: fuel oil and coke.
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Shpirt et al. (2011) studied this question.
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