Sulfur Daily Question 2018.11.21
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What is the relationship between the reaction constants of the CLAUS reaction for H2S and SO2 and temperature? Answer: The CLAUS reaction between H2S and SO2 occurs; when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases ； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases.
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases.
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases.
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases.
The CLAUS reaction between H2S and SO2: when the temperature is above 630°C, it is a high-temperature CLAUS reaction. This is an endothermic reaction, the reaction constant increases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also increases； When the reaction temperature is below 630°C, a low-temperature CLAUS reaction takes place; a catalyst is required for this reaction, which is exothermic. The reaction constant decreases as the temperature rises, and accordingly the conversion rate of hydrogen sulfide also decreases
The Claus reaction: 2H2S + SO2 = 3S + 2H2O + Q is a reversible, exothermic reaction. According to the theory of chemical equilibrium, an increase in temperature shifts the chemical equilibrium in the direction of the endothermic process. Therefore, as the temperature rises, 2H2S+SO2=3S+2H2O+Q theoretically favors the reverse reaction, and the chemical equilibrium constant should decrease.