True or False Questions, October 29, 2016 (3 points for participation, 8 points for correct answers)
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Factors that affect the shift reaction include temperature, pressure, and gas ratio. The higher the temperature, the faster the reaction rate; however, the equilibrium constant of the shift reaction also increases, which is unfavorable for the forward progression of the reaction. In other words, the equilibrium concentration of CO after the shift increases, and therefore there is an optimal reaction temperature for this process. Answers are valid for two days only; no extensions will be given! ! ! ! ! ! ! ! ! ! ! ! ! √
The carbon monoxide conversion reaction is a reversible exothermic reaction; therefore, an increase in temperature is unfavorable for the reaction equilibrium. In other words, the equilibrium conversion rate of carbon monoxide decreases as temperature rises. However, within the active range of the catalyst, increasing the temperature can accelerate the reaction rate. Under the same gas composition and gas-to-solid ratio conditions, selecting an appropriate temperature that facilitates both an increase in the equilibrium conversion rate of CO and an acceleration of the reaction rate enables optimal reaction results and the most efficient use of catalyst. Therefore, it is correct to say that there is an optimal reaction temperature for transformation reactions.