緩衝混合気体による酸素分圧と硫黄分圧の同時制御について
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概要
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The partial pressures of oxygen and sulfur in the <special>H2O-H2-H2S</special> system, in the <special>CO2-H2-H2S</special> system and in the <special>SO2-H2-H2S</special> system were calculated as functions of the mixing ratios of the gases by means of the Newton-Raphson approximation. In the <special>H2O-H2-H2S</special> system, the partial pressures of oxygen(<special>Po2</special>)are less than the values calculated in the <special>H2O-H2</special> system in the <special>H2S</special>-richregion(Figs. 1 and 2). Similarly, the partial pressures of sulfur(<special>Ps2</special>)decrease in the <special>H2O</special>-rich region, compared with those in the <special>H2S-H2</special> system (Figs. 3 and 4). There exists a region where <special>Po2</special> is independent of the <special>H2S/H2</special> ratio. These regions are shown in Fig. 5. In the <special>CO2-H2-H2S</special> system, the mixing ratio dependence of <special>Po2</special> is similar to that in the<special>H2O-H2-H2S</special> system (Figs.6 and 7). But, <special>Ps2</special> is fairly affected by the addition of <special>CO2</special> (Figs. 8 and 9). Therefore, the region where both <special>Po2</special> and <special>Ps2</special> are independently controlled is rather narrower than that in the <special>H2O-H2-H2S</special> system (Fig. 10). The results obtained in the <special>SO2-H2H2S</special> system are illustrated in Figs. 11 to 14. In this system, there exists no region where both <special>Po2</special> and <special>Ps2</special> are independently controlled. Accordingly, this system is not suited for the simultaneous control of <special>Po2</special> and <special>Ps2</special>. However, because this system keeps high <special>Ps2</special> in the high <special>Po2/special> region (<special>SO2</special>-rich region), it will be used for special purpose such as a case of controlling high <special>Po2</special> and high <special>Ps2</special>.
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