Some issues with hydrogen production from natural gas
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The manufacturer provides complete sets of equipment for Linde, with a production capacity of 5,000 NM3/H. Communication with foreigners is rather difficult, and since they do not understand technical aspects in order to work alongside the operators, it is not possible to reach a confirmation. There are a few points that I still don’t understand; I hope someone with expertise can provide some guidance: 1. Why is the temperature difference smaller at higher inlet temperatures in the natural gas-to-hydrogen shift reactor? 2. How many years is the service life of the cobalt oxide/molybdenum oxide zinc oxide dual-catalyst desulfurizer? 3. What is the typical nitrogen removal rate of PSA units? 4. Is a high ignition pressure a problem? 5. How to determine whether a catalyst is sulfur poisoned? What is the phenomenon? 6. The inlet temperature of PSA is higher in summer than in winter. It has been observed through operation that the PSA regeneration time is significantly affected by temperature; should the inlet temperature of PSA be adjusted according to the season? Best regards!
1. Converting the reaction to an exothermic one; a large temperature difference indicates a high carbon monoxide content in the medium-temperature gas. In the converter, methane reacts with water vapor, as does carbon monoxide with water vapor. ~2. The sulfur capacity of the desulfurizing agent indicates the maximum amount of hydrogen sulfide that can be absorbed; this is determined by the sulfur content in the feed gas
What has changed is only the inlet temperature of the conversion reaction; the CO content in the intake air remains unchanged. Are there any devices similar to those for controlling output? How many years can a desulfurization catalyst generally last? The content in the feed gas is generally around 15 PPM. It should be more or less the same.