Seeking help with several questions regarding hydrogen production from methanol
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The company is installing a new methanol-to-hydrogen production system with a capacity of 1,700 NM3/h, which is currently under commissioning. I have a few questions and would appreciate it if the experienced colleagues could offer their guidance. The system has been installed and pressurized. The heat transfer oil, copper oxide catalyst, and adsorbent have been installed, and the system is ready for commissioning. 1. For the first time of use, how to reduce the copper oxide catalyst? Use externally purchased hydrogen cylinders for reduction; measure the hydrogen content in the emissions, and be careful to drain water during the process. Hydrogen + copper oxide = copper + water; or it can operate at a low load, and once the heat transfer oil reaches the required temperature, the metering pumps for methanol and pure water are activated to carry out cracking and displacement. Samples are taken to analyze the levels of hydrogen and carbon dioxide, and the reduction process is completed once the process requirements are met
Which company’s? Our company has a methanol-to-hydrogen plant with a capacity of 3300 Nm2/h. You can contact me.
For the first use, the copper catalyst must first be fully oxidized before being reduced. Purchased pure hydrogen is injected into the reactor; the hydrogen compressor is started and operated at low load. Samples are taken from both the inlet and outlet using gas cylinders, with sampling carried out every half hour or hour. As long as it meets the requirements, it’s fine.
Most catalysts today can be used for hydrogen production via self-reduction with methanol
Most catalysts today can be used for hydrogen production via self-reduction with methanol
We purchase hydrogen externally, and the water volume is measured
Well, the catalyst we use also enables hydrogen production via methanol self-reduction.
The choice of reduction method depends mainly on your process setup; if you do not have a nitrogen-hydrogen reduction process (with a circulating Roots blower and nitrogen return line), you can only use the methanol-water reduction method. Additionally, it is recommended to consult the manufacturer of the device or the catalyst manufacturer; they should provide a reduction solution. Otherwise, if problems arise from attempting reduction on your own, you will have to bear the responsibility yourself.
The choice of reduction method depends mainly on your process setup; if you do not have a nitrogen-hydrogen reduction process (with a circulating Roots blower and nitrogen return line), you can only use the methanol-water reduction method. Additionally, it is recommended to consult the manufacturer of the device or the catalyst manufacturer; they should provide a reduction solution. Otherwise, if problems arise from attempting reduction on your own, you will have to bear the responsibility yourself.
Reduction with hydrogen is called dry gas reduction； Using a methanol and water solution is called wet reduction. It should be done according to the manufacturer’s requirements