Experimental Study on Gas Dispersion Systems for Hydrogen Production by Methane Pyrolysis
When methane gas is directly introduced into the liquid molten medium,it is difficult to be uniformly dispersed in the liquid molten medium,and the formed bubble size is relatively large.This is not conducive to the heat exchange between methane gas and the high-temperature molten medium,thereby affecting the efficiency of hydrogen production by methane pyrolysis.In view of this,a gas dispersion system device is proposed.By using microporous ceramics as the gas disperser,it can not only greatly improve the dispersion degree of the gas in the liquid molten medium,but also effectively reduce the bubble size.Cold-state experiments were carried out on this gas dispersion system device to explore the influence of parameters such as the pore size,outer diameter of the microporous ceramics,and inlet gas flow rate on the gas dispersion effect.The results show that when the micro-pore size is within the range of 50～100 μm,not only the bubble size is relatively small,but also the resulting gas pressure drop is relatively low;both an overly large or small outer diameter of the microporous ceramics is not conducive to enhancing the gas dispersion effect;moderately increasing the inlet gas flow rate can promote the in-teraction between the gas and the liquid to a certain extent.
methane pyrolysis for hydrogen productiongas dispersion systemsmicroporous ceramicmolten metal
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