Systems and methods for production of low carbon intensity hydrogen from geologic sources

A system for producing a hydrogen gas product and a carbon dioxide-rich gas stream, the system comprising:

• hydrogen purification equipment configured to receive feedstock from a geologic hydrogen source, wherein the hydrogen purification equipment is configured for separating carbon dioxide from hydrogen in the feedstock to provide an effluent including hydrogen and a first purge gas including carbon dioxide, wherein the hydrogen purification equipment includes a first pressure swing adsorption (PSA) device;
• carbon dioxide purification equipment for separating carbon dioxide from other gases in the first purge gas to provide the carbon dioxide-rich gas stream having a carbon dioxide molar fraction of at least 50 mol % and a second purge gas, wherein the carbon dioxide purification equipment includes a secondary PSA device, a temperature-swing adsorption, a separation membrane, a chemical-solvent absorption, or a cryogenic distillation;
• and
• a reactor configured to receive hydrogen of the effluent and the carbon dioxide-rich gas stream and to produce a synthesis product, wherein the synthesis product comprises one or more of synthetic natural gas, carbon monoxide, methanol, ethanol, Fischer-Tropsch hydrocarbons, olefins, urea, and urea ammonium nitrate.