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jiayangjxsh@163.com
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Shanghai Jiayang Teaching Equipment Co., Ltd
Methanol cracking hydrogen production training device
NegotiableUpdate on 02/03
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Overview
The methanol cracking hydrogen production training device mixes methanol and desalinated water in a certain proportion and is preheated by a heat exchanger before being sent to the vaporization tower. The vaporized water methanol vapor is superheated by the boiler and enters the converter for catalytic cracking and transformation reaction in the catalyst bed, producing a conversion gas containing about 74% hydrogen gas and 24% carbon dioxide. After heat exchange, cooling and condensation, it enters the water washing absorption tower. The tower kettle collects unconverted methanol and water for recycling, and the top gas is sent to the pressure swing adsorption device for purification.
Product Details
Methanol cracking hydrogen production training deviceMethanol and desalinated water are mixed in a certain proportion and preheated by a heat exchanger before being sent to the vaporization tower. The vaporized water methanol vapor is superheated by a boiler and enters the converter for catalytic cracking and transformation reaction in the catalyst bed, producing a conversion gas containing about 74% hydrogen and 24% carbon dioxide. After heat exchange, cooling and condensation, it enters the water washing absorption tower. The tower kettle collects unconverted methanol and water for recycling, and the top gas is sent to the pressure swing adsorption device for purification.
According to different requirements for product gas purity and trace impurity components, using a four tower or higher process can further improve purity. The design processing capability is The pressure swing adsorption device with a conversion capacity of 1500 Nm3/h can achieve a hydrogen recovery rate of over 90%.
The carbon dioxide in the converted gas can be purified to food grade using a pressure swing adsorption device, which is used in the beverage and alcohol industries. This can greatly reduce production costs. The process setting first separates carbon dioxide through a pressure swing adsorption device, and then the converted gas rich in hydrogen is pressurized and sent to the pressure swing adsorption device for purification.
reaction mechanism
The mixture of methanol and steam is catalyzed under pressure in a converter to complete the conversion reaction, producing hydrogen and carbon dioxide. The reaction equation is as follows:
Main reaction: CH3OH＋H2O＝CO2＋3H2 + KJ/mol
Side effects: CH3OH＝CO＋2H2 + KJ/mol
2CH3OH＝CH3OCH3＋H2O －mol
CO+3H2=CH4+H2O -mol
The main reaction is an endothermic reaction, which is heated externally using thermal oil. After cooling and condensing, the converted gas enters the water washing process The tower and kettle collect unconverted methanol and water for recycling, and the converted gas at the top of the tower is sent to the pressure swing absorption through a buffer tank Separate the hydrogen extraction device.
