How to perform material balance in dry gas hydrogen production plants
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I would like to ask the experienced colleagues how they carry out material balance calculations for hydrogen production plants. In our plant, the inputs include natural gas, naphtha, hydrogen added as a reactant, as well as the amount of deionized water minus the amount of steam sent out at 3.5 MPa minus the amount of condensate sent out; the outputs consist of product hydrogen and purge gas. However, we are unable to achieve a balance. I hope the experts can give us some guidance
There are several aspects to the material balance for hydrogen production: 1. The conversion of raw materials and products, as well as the use of appropriate units. Calculate the mass based on the composition density. 2. Most of the wear and tear. For example, in-line arrangement, water-like sewage discharge, etc. 3. Instrument issues. It is normal for there to be an error of 5~10% when using orifice plates to measure gas flow rates. Whether the collected data is accurate (time period). Temperature and pressure compensation is required; it is necessary to check that the temperature and pressure in the background match the actual conditions. 4. Check whether there are any leaks in the device’s various vent valves, safety valves, and other related equipment.
It’s impossible to achieve complete balance when making this, and there will definitely be some errors in the final product; what matters is whether those errors fall within the acceptable range.