Yield and purity of hydrogen-enriched gas reformed by a continuous reforming unit
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This post was last edited by zhiweichou on 2017-10-7 09:44. I would like to ask the experts: What are the yield and purity of the hydrogen-rich gas produced by continuous reforming units? What affects the yield of reformed hydrogen-rich gas? With different raw materials and processes, is there a significant difference in the yield and purity of the hydrogen-enriched gas obtained from reforming?
The purity of hydrogen-rich gas ranges from 86% to 95%, and this varies depending on the raw materials used as well as the processing methods. The yield and purity of hydrogen-rich gas obtained through reforming are influenced by many factors, the main ones of which are as follows: 1. Properties of the raw materials: If the reforming feedstock has a high aromatic potential and a high content of naphthenes, then both the hydrogen production volume and the purity of the hydrogen will be high； 2. Catalyst activity: The higher the catalyst activity, the higher the hydrogen production and yield. 3. Operating conditions: Control the appropriate level of reaction severity and maintain the reaction temperature at an optimal level; this ensures a high yield of aromatics while preventing excessive temperature from accelerating the cracking reaction and affecting hydrogen purity. Ensuring stable reaction pressure mainly involves ensuring the steady operation of the recycle hydrogen compressor. Ensure an appropriate hydrogen-to-oil ratio. 4. Regeneration operation: Ensuring good regeneration performance of the catalyst is essential, as a good recovery of catalyst activity forms the basis for the reaction. 5. System environment: Maintain an appropriate balance of water and chlorine in the system to prevent conditions of excessive moisture, dryness, high chlorine levels, or low chlorine levels. 6. Steady operation during re-contact: After hydrogen is produced in the reforming reaction, deep cooling and pressurization purification are the main steps involved. For deep cooling, methods such as ammonia cooling and propane refrigeration are used; the purpose of this step is to lower the temperature. Pressurization involves using compressors (both reciprocating and centrifugal) to increase the pressure. After pressurization and deep cooling separation, the purity of the hydrogen-rich gas can reach around 92%. Some processes use only cryogenic cooling, some only pressurization, and some use both. The purity of the hydrogen after the reaction is mainly determined by the temperature and pressure during recontact.