Low temperature reforming process for production of hydrogen from methanol
AssigneeNational Tsing Hua University
InventorChuin-Tih Yeh
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Abstract
A hydrogen production process with high hydrogen yield at a low temperature is described. First, an aqueous methanol solution with water/methanol molar ratio between about 0.75 and about 2.5 is pre-mixed with oxygen in an oxygen/methanol molar ratio not greater than about 0.5. The mixture is then directed to pass through an activated supported gold catalyst undergoing an oxidative steam reforming of methanol to generate a hydrogen-rich gas with CO content less than 1% at a low reaction temperature (TR>150° C.). Gold particles on active supported gold catalysts have been dispersed to a size of 6 nm or less. The oxidative steam reforming of methanol may generate more than 2 moles of hydrogen for each mole of methanol consumed.
Claims9
A method for producing hydrogen gas at a low temperature, comprising:
- mixing an aqueous methanol with oxygen, wherein a water/methanol molar ratio in the aqueous methanol is between about 0.75 and 2.5, and an oxygen/methanol molar ratio is not greater than 0.5;
- and
- passing the mixed vapor of the aqueous methanol and oxygen through a catalyst to catalyze an oxidative steam reformation of methanol to yield hydrogen gas with a CO content not greater than 1% at a temperature lower than about 200° C., and each mole of consumed methanol generates more than 2 moles of hydrogen gas, wherein the catalyst comprises gold particles supported on zinc oxide.
A method for producing hydrogen gas at a low temperature, comprising:
- mixing an aqueous methanol with oxygen, wherein a water/methanol molar ratio in the aqueous methanol is between about 0.75 and 2.5, and an oxygen/methanol molar ratio is not greater than about 0.5;
- and
- passing a mixed vapor comprising the aqueous methanol and oxygen through a catalyst to catalyze an oxidative steam reformation of methanol to yield hydrogen gas with a CO content not greater than about 1% at a temperature lower than about 200 ° C., wherein the catalyst comprises gold particles supported on an oxide support.
Dependencies are inferred from the claim text.