【Ethylene Question Bank】What are the tasks of each section in ethylene separation?
Thread Content
This post was last edited by Guan Gongyu on 2015-10-19 at 15:05. What are the tasks for each stage of ethylene separation? (10) 1. Demethanization tower and cryogenic tank: 2. C3 hydrogenation: 3. Propylene distillation: 4. Methanation. 1. Demethanization tower and cryogenic tank: (1) Separate hydrogen and methane from C2 and C3 to ensure that the ethylene product meets quality requirements. (2) Produce the crude hydrogen required for methanation. (3) Produce exhaust gas used as fuel for the pyrolysis furnace. (4) Minimize the loss of C2= in the exhaust gas and H2. (5) Recover cold energy while heating the circulating fluid. 2. C3 hydrogenation: C3 hydrogenation – Hydrogenating the C3 fraction to remove MAPD. 3. Propylene distillation: Propylene distillation – Separating propylene from propane to obtain propylene of polymerization grade and propane that can be recycled back to the cracking furnace. 4. Methanation – Removing CO from crude hydrogen product. Correct answer: +10; Explanation: +15; Experience sharing: +20. Other moderators of this forum, please assist with scoring
1. The task of the demethanization tower is to separate hydrogen, methane, and other inert gases from the pyrolysis gas from components with a molecular weight of C2 or higher; the key components in this tower are methane and ethylene. The ethylene cryogenic tank is one of the key equipment in an ethylene plant, used for the low-temperature separation of ethylene. 2. The propyne trihydrogenation reactor uses a catalyst to convert propyne (MA) and methylene in the propyne fraction from the top of the depropanization tower into propylene through hydrogenation, thereby producing propylene of suitable quality for polymerization purposes. 3. The main task of propylene distillation is to separate the pyrolysis gas into propylene products with very high purity through distillation processes. 4. Methanation is a reaction in which carbon monoxide and carbon dioxide are reduced to methane and water using hydrogen in the presence of a catalyst.
1. The task of the demethanization tower is to separate hydrogen, methane, and other inert gases from the pyrolysis gas from components with a molecular weight of C2 or higher; the key components in this tower are methane and ethylene. The ethylene cryogenic tank is one of the key equipment in an ethylene plant, used for the low-temperature separation of ethylene. 2. The propyne trihydrogenation reactor uses a catalyst to convert propyne (MA) and methylene in the propyne fraction from the top of the depropanization tower into propylene through hydrogenation, thereby producing propylene of suitable quality for polymerization purposes. 3. The main task of propylene distillation is to separate the pyrolysis gas into propylene products with very high purity through distillation processes. 4. Methanation is a reaction in which carbon monoxide and carbon dioxide are reduced to methane and water using hydrogen in the presence of a catalyst.
1. The task of the demethanization tower is to separate hydrogen, methane, and other inert gases from the pyrolysis gas from components with a molecular weight of C2 or higher; the key components in this tower are methane and ethylene. The ethylene cryogenic tank is one of the key equipment in an ethylene plant, used for the low-temperature separation of ethylene. 2. The propyne trihydrogenation reactor uses a catalyst to convert propyne (MA) and methylene in the propyne fraction from the top of the depropanization tower into propylene through hydrogenation, thereby producing propylene of suitable quality for polymerization purposes. 3. The main task of propylene distillation is to separate the pyrolysis gas into propylene products with very high purity through distillation processes. 4. Methanation is a reaction in which carbon monoxide and carbon dioxide are reduced to methane and water using hydrogen in the presence of a catalyst.
What is the task of each section in ethylene separation? Propylene distillation
1. The demethanization tower separates methane and hydrogen; the cryogenic tank is used to further separate methane and hydrogen, resulting in high-pressure and low-pressure methane and hydrogen. 2. Tricarbene hydrogenation is used to remove MAPD from propylene in order to obtain more product. 3. Propylene distillation yields propylene products of high purity. 4. Methanation is used to remove carbon monoxide from crude hydrogen; carbon monoxide in ethylene is primarily formed as a result of the reaction between carbon and water within the tubes of the cracking furnace~