【Q&A Question 250】2018.09.13
Thread Content
[Q&A Question 250] September 13, 2018: Briefly explain how the properties of the feed oil affect the catalyst life.? 1) Initial boiling point: An increase in the initial boiling point leads to higher viscosity, more impurities and non-ideal components, which makes it easier for the catalyst to coking and reduces its lifespan. 2) Content of metal compounds (mainly Fe, V, and Ni compounds): As the content of metal compounds increases, the pressure drop across the catalyst bed rises more rapidly, and its lifespan is shortened. 3) Salt (Na salts and chlorides) content: An increase in sodium content can easily lead to catalyst poisoning. 4) Residual carbon content: An increase in residual carbon content indicates a higher amount of substances that tend to cause coking, which has an adverse effect on the catalyst’s activity. 5) Viscosity: An increase in viscosity hinders the distribution of the feedstock within the bed layer as well as mass transfer and diffusion, which can lead to pressure drop fluctuations and is detrimental to the catalyst. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
As the content of metal compounds (mainly Fe, V, and Ni compounds) increases, the pressure drop in the catalyst bed rises more rapidly, and its lifespan is shortened
As the content of metal compounds (mainly Fe, V, and Ni compounds) increases, the pressure drop in the catalyst bed rises more rapidly, and its lifespan is shortened
1) Initial boiling point: An increase in the initial boiling point leads to higher viscosity, more impurities and non-ideal components, which makes it easier for the catalyst to coking and reduces its lifespan. 2) Content of metal compounds (mainly Fe, V, and Ni compounds): As the content of metal compounds increases, the pressure drop across the catalyst bed rises more rapidly, and its lifespan is shortened. 3) Salt (Na salts and chlorides) content: An increase in sodium content can easily lead to catalyst poisoning. 4) Residual carbon content: An increase in residual carbon content indicates a higher amount of substances that tend to cause coking, which has an adverse effect on the catalyst’s activity. 5) Viscosity: An increase in viscosity hinders the distribution of the feedstock within the bed layer as well as mass transfer and diffusion, which can lead to pressure drop fluctuations and is detrimental to the catalyst.
(1) Dry point: The dry point increases, viscosity is high, there are many impurities and non-ideal components, the catalyst tends to coking, and its lifespan is reduced. (2) Content of metal compounds (mainly Fe, V, and Ni compounds): As the content of metal compounds increases, the pressure drop across the catalyst bed rises more rapidly, and its lifespan is shortened. (3) Salt (Na salts and chlorides) content: An increase in sodium content can easily lead to catalyst poisoning.
(1) Dry point: The dry point increases, viscosity is high, there are many impurities and non-ideal components, the catalyst tends to coking, and its lifespan is reduced. (2) Content of metal compounds (mainly Fe, V, and Ni compounds): As the content of metal compounds increases, the pressure drop across the catalyst bed rises more rapidly, and its lifespan is shortened. (3) Salt (Na salts and chlorides) content: An increase in sodium content can easily lead to catalyst poisoning.
Answer: 1) Initial boiling point: An increase in the initial boiling point leads to higher viscosity, more impurities and non-ideal components, which makes it easier for the catalyst to coking and reduces its lifespan. 2) Content of metal compounds (mainly Fe, V, and Ni compounds): As the content of metal compounds increases, the pressure drop across the catalyst bed rises more rapidly, and its lifespan is shortened. 3) Salt (Na salts and chlorides) content: An increase in sodium content can easily lead to catalyst poisoning. 4) Residual carbon content: An increase in residual carbon content indicates a higher amount of substances that tend to cause coking, which has an adverse effect on the catalyst’s activity. 5) Viscosity: An increase in viscosity hinders the distribution of the feedstock within the bed layer as well as mass transfer and diffusion, which can lead to pressure drop fluctuations and is detrimental to the catalyst.
A high metal content can easily accelerate the rate of catalyst deactivation. A high nitrogen content can easily cause poisoning of the cracking agent; to improve denitration efficiency, the reaction temperature must be increased, and an increase in reaction temperature shortens the operating cycle
1) Initial boiling point: An increase in the initial boiling point leads to higher viscosity, more impurities and non-ideal components, which makes it easier for the catalyst to coking and reduces its lifespan. 2) Content of metal compounds (mainly Fe, V, and Ni compounds): As the content of metal compounds increases, the pressure drop across the catalyst bed rises more rapidly, and its lifespan is shortened. 3) Salt (Na salts and chlorides) content: An increase in sodium content can easily lead to catalyst poisoning. 4) Residual carbon content: An increase in residual carbon content indicates a higher amount of substances that tend to cause coking, which has an adverse effect on the catalyst’s activity. 5) Viscosity: An increase in viscosity hinders the distribution of the feedstock within the bed layer as well as mass transfer and diffusion, which can lead to pressure drop fluctuations and is detrimental to the catalyst.
The heavier the crude oil or distillate, the higher the content of impurities such as metals and gums that can cause catalyst deactivation, and thus the shorter the catalyst’s lifespan. Comparatively, distillate oil is lighter and contains less impurities such as metals, so the catalyst has a longer service life.
This post was last edited by “Hasty Passerby” on September 13, 2018, at 15:31. When the content of metal compounds (mainly Fe, V, and Ni compounds) increases, the pressure drop across the catalyst bed rises rapidly, and its lifespan is shortened. The initial boiling point decreases; the viscosity is low, while there are many impurities and undesirable components. As a result, the catalyst is prone to coking, leading to a shorter lifespan. An increase in carbon residue content indicates that there are fewer substances prone to coking, which is beneficial for maintaining catalyst activity. An increase in sodium content does not cause caking in the catalyst bed