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Purification Technology Edition: Daily Question [2017-11-11]

2017-11-11View Original

Thread Content

Why does medium transformation need to be carried out in two stages? According to the reaction equations and principles, increasing the temperature helps to accelerate the reaction rate; since the conversion reaction is an exothermic reaction, reducing the temperature can result in a higher conversion rate. To resolve this contradiction, we define two segments of transformation. In the upper conversion section, higher temperatures accelerate the reaction rate, allowing most of the carbon monoxide to be converted there; subsequently, a heat exchanger is used to lower the temperature, so as to achieve a higher conversion rate in the lower conversion section. Therefore, the transformation is carried out in two stages via intermediate variation.
Reply #22017-11-11
The purpose of segmentation is, first, to control the hotspot temperature of the bed layer. Secondly, the conversion rate of the shift converter is improved through inter-segment heat exchange or humidification for cooling.
Reply #32017-11-11
The purpose of segmentation is, first, to control the hotspot temperature of the bed layer. Secondly, the conversion rate of the shift converter is improved through inter-segment heat exchange or humidification for cooling.
Reply #42017-11-11
The purpose of segmentation is, first, to control the hotspot temperature of the bed layer. Secondly, the conversion rate of the shift converter is improved through inter-segment heat exchange or humidification for cooling.
Reply #52017-11-11
First is to control the hotspot temperature of the bed layer. Secondly, the conversion rate of the shift converter is improved through inter-segment heat exchange or humidification for cooling.
Reply #62017-11-11
The purpose of segmentation is, first, to control the hotspot temperature of the bed layer. Secondly, the conversion rate of the shift converter is improved through inter-segment heat exchange or humidification for cooling.
Reply #72017-11-11
To resolve this contradiction, we define two segments of transformation. In the upper conversion section, higher temperatures accelerate the reaction rate, allowing most of the carbon monoxide to be converted there; subsequently, a heat exchanger is used to lower the temperature, so as to achieve a higher conversion rate in the lower conversion section. Therefore, the transformation is carried out in two stages via intermediate variation. 2017 Year 1
Reply #82017-11-11
Based on the reaction equations and principles, it is known that increasing the temperature helps to accelerate the reaction rate; since the conversion reaction is an exothermic reaction, reducing the temperature can result in a higher conversion rate. To resolve this contradiction, we define two segments of transformation. In the upper conversion stage, higher temperatures accelerate the reaction rate, and most of the CO is converted in the upper part; subsequently, a heat exchanger is used to transfer it downward. In the lower conversion stage, a higher conversion rate is sought, which is why the conversion is carried out in two stages.
Reply #92017-11-11
A high conversion rate requires a high conversion temperature; using extremely high temperatures poses difficulties in terms of equipment and process control, resulting in high costs for both the equipment and operation. A suitable temperature difference between the two stages ensures good catalyst activity
Reply #102017-11-11
According to the reaction equations and principles, increasing the temperature helps to accelerate the reaction rate; since the conversion reaction is an exothermic reaction, reducing the temperature can result in a higher conversion rate. To resolve this contradiction, we define two segments of transformation. In the upper conversion section, higher temperatures accelerate the reaction rate, allowing most of the carbon monoxide to be converted there; subsequently, a heat exchanger is used to lower the temperature, so as to achieve a higher conversion rate in the lower conversion section. Therefore, the transformation is carried out in two stages using intermediate variations
Reply #112017-11-11
The purpose of segmentation is, first, to control the hotspot temperature of the bed layer. Secondly, the conversion rate of the shift converter is improved through inter-segment heat exchange or humidification for cooling.

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