[Q&A Question 088] 2016.07.17

After stopping the addition of water to the reaction, the reaction depth decreases even if the operating conditions remain unchanged. This is because hydrocracking catalysts are bifunctional catalysts, possessing both hydrogenation and cracking capabilities. It is the acidic sites on these catalysts that enable the cracking function; these acidic sites readily adsorb the basic NH3. After the water supply to the reaction is stopped, the ammonia content in the recycle hydrogen increases significantly, and a large amount of NH3 gets adsorbed onto the acidic sites of the catalyst. As a result, the number of active acidic sites available for reacting with the oil products decreases, leading to a reduction in the overall activity of the catalyst. If the temperature of the catalyst bed is not increased, the depth of the reaction will decrease. At the same time, the presence of ammonia inhibited the occurrence of secondary reactions, reducing the formation of gaseous products.

After stopping the addition of water to the reaction, the reaction depth decreases even if the operating conditions remain unchanged. This is because hydrocracking catalysts are bifunctional catalysts, possessing both hydrogenation and cracking capabilities. It is the acidic sites on these catalysts that enable the cracking function; these acidic sites readily adsorb the basic NH3. After the water supply to the reaction is stopped, the ammonia content in the recycle hydrogen increases significantly, and a large amount of NH3 gets adsorbed onto the acidic sites of the catalyst. As a result, the number of active acidic sites available for reacting with the oil products decreases, leading to a reduction in the overall activity of the catalyst. If the temperature of the catalyst bed is not increased, the depth of the reaction will decrease. At the same time, the presence of ammonia inhibited the occurrence of secondary reactions, reducing the formation of gaseous products

The reaction depth decreases. The catalyst activity is suppressed due to the inability to remove nitrogen from the circulating hydrogen.

Increase； Because the hydrogen concentration has increased.

After stopping the addition of water to the reaction, with the operating conditions remaining unchanged, what will happen to the degree of reaction?； After stopping the addition of water to the reaction, even if the operating conditions remain unchanged, the reaction depth decreases ；

After the reaction water injection is stopped, even if the operating conditions remain unchanged, the reaction depth will decrease. This is because hydrocracking catalysts are bifunctional catalysts, possessing both hydrogenation and catalytic functions; it is the acidic centers on these catalysts that enable cracking. These acidic centers readily adsorb the basic ammonia gas. After water is stopped being added to the reaction mixture, the ammonia content in the recycle hydrogen increases significantly, and a large amount of ammonia adsorbs onto the acidic centers of the catalyst. As a result, the number of active acidic centers available for reacting with the oil products decreases, leading to a reduction in the overall activity of the catalyst. If the temperature of the catalyst bed is not increased, the depth of the reaction will decrease. At the same time, the presence of ammonia inhibited the occurrence of secondary reactions, reducing the production of gaseous products.

Decline. This is because hydrocracking catalysts are bifunctional catalysts, possessing both hydrogenation and cracking capabilities. It is the acidic sites on these catalysts that enable the cracking function; these acidic sites readily adsorb the basic NH3. After the water supply to the reaction is stopped, the ammonia content in the recycle hydrogen increases significantly, and a large amount of NH3 gets adsorbed onto the acidic sites of the catalyst. As a result, the number of active acidic sites available for reacting with the oil products decreases, leading to a reduction in the overall activity of the catalyst. If the temperature of the catalyst bed is not increased, the depth of the reaction will decrease. At the same time, the presence of ammonia inhibited the occurrence of secondary reactions, reducing the formation of gaseous products

Reduce； Because there is a constant need for water to cool things down, I guess