Experimental Determination of In Situ Hydrogen Sulfide Production during Thermal Recovery Processes

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• 作者：Riyi Lin ; Duopei Song ; Xinwei Wang ; Daoyong Yang
• 刊名：Energy & Fuels
• 出版年：2016
• 出版时间：July 21, 2016
• 年：2016
• 卷：30
• 期：7
• 页码：5323-5329
• 全文大小：280K
• 年卷期：0
• ISSN：1520-5029

文摘

Experimental techniques have been developed to determine in situ hydrogen sulfide (H₂S) generation as a function of solution alkalinity, SO₄^2– concentration, and surrounding gas during thermal recovery processes. Experimentally, well-designed laboratory tests have been conducted to quantify the in situ generation of H₂S in a surface passivation reactor. The reaction gases were analyzed using a gas analyzer, while the solution pH values were measured using a glass electrode. Solution alkalinity restrained the formation of H₂S after subtracting the amount of H₂S that neutralizes alkali in the solution. H₂S production increases with an increase in SO₄^2– concentrations. CO₂ when used as the surrounding gas increases H₂S production relative to N₂. In comparison to N₂, the presence of CO₂ in the gas phase led to the significant increase in H₂S generation and the H₂S concentration was up to 32.1% at 280 °C. It is essential that the effect of solution pH values and SO₄^2– concentrations on the formation water and surrounding gas be taken into account while predicting produced hydrogen sulfide.