Hydrogen production water-to-carbon ratio
Thread Content
The water-to-carbon ratio in the dry gas hydrogen production unit remains between 6 and 9; what impact does this have on the hydrogen production conversion and intermediate transformation?
Increase fuel consumption； It affects the subsequent intermediate-pressure gas cooling load.
Such a high water-to-carbon ratio is relatively rare.
3.0~3.5 is too high; it wastes steam and heat sources.
Could the experts provide a detailed explanation?
When the water-to-carbon ratio is too high, energy consumption increases; when this ratio exceeds 7.5, the catalyst enters an oxidized state, resulting in a decrease in its activity
From the perspective of chemical equilibrium, increasing the water-to-carbon ratio is beneficial for the conversion reaction, improves the conversion rate of the feedstock, and helps to suppress catalyst carbon deposition. However, an excessive amount of unreacted water vapor will also absorb heat in the converter, increasing fuel consumption. At the same time, it raises the demand for circulating water during the cooling process, necessitates a larger heat exchanger area and thus increases costs; this leads to higher energy consumption and hydrogen production costs for the facility ； A lower water-to-carbon ratio will reduce the thermal load on the converter and lower fuel consumption, which helps to decrease hydrogen costs and the energy consumption of the facility. However, the converted water-carbon ratio should not be too low either, as a too-low ratio increases the tendency for carbon deposition on the catalyst. Based on the selection of the conversion temperature of the device and comprehensive analysis, a suitable water-to-carbon ratio is determined.