Process for using waste heat and carbon dioxide from the production of low, neutral and/or negative carbon intensity hydrogen
A method for providing energy to commercial or industrial operations, such as greenhouses and algae farms, is provided. The method includes the step of recovering waste heat from a hydrogen production process, wherein the hydrogen product has a carbon intensity preferably less than about 1.0 kg CO 2 e/kg H 2 , more preferably less than about 0.45 kg CO 2 e/kg H 2 , and most preferably less than about 0.0 kg CO 2 e/kg H 2 . The hydrogen is preferably produced by converting a hydrocarbon feedstock to hydrogen through a reforming process, wherein at least some, and preferably substantially all, of the required energy for the hydrogen production process is provided from a biomass power plant. The method also includes the steps of processing one or more gas streams containing carbon dioxide from the biomass power plant and the hydrogen production process in one or more carbon capture unit to reduce CO 2 e emissions, and converting at least some of the waste heat to thermal energy for use in the commercial or industrial operations. The method further comprises the step of providing at least some, and preferably substantially all of the required energy for the commercial or industrial operations from the biomass power plant.
1. A method for providing energy to commercial or industrial operations, comprising:
recovering waste heat from a hydrogen production process, wherein the hydrogen product has a carbon intensity less than about 1.0 kg CO 2 e/kg H 2 ; wherein the hydrogen is produced by converting a hydrocarbon feedstock to hydrogen through a reforming process, wherein at least some of the required energy for the hydrogen production process is provided from a biomass power plant comprising the direct combustion of a biomass feedstock; wherein the energy produced by the biomass power plant is selected from one or more of:
(a) electricity generated from work produced by a Rankine cycle or Brayton cycle;
(b) steam that can be used as process steam in the hydrogen production process;
(c) steam that can be used as thermal energy; or
(d) steam that can be used to power a mechanical drive; and
processing one or more gas streams containing carbon dioxide from the biomass power plant and the hydrogen production process in one or more carbon capture unit to reduce CO 2 e emissions;
converting at least some of the waste heat to thermal energy for use in the commercial or industrial operations.
2. The method of claim 1 , further comprising converting at least some of the thermal energy to steam to power a mechanical drive for one or more motors generating shaft torque in the commercial operation.
3. The method of claim 1 , wherein the thermal energy is used to produce hot water or steam for district heating in the commercial or industrial operations.
4. The method of claim 1 , wherein the thermal energy is used to produce hot water or steam for an absorption chiller to provide chilling duty for district cooling in the commercial or industrial operations.
5. The method of claim 1 , wherein the commercial or industrial operations comprises one or more greenhouses, and the thermal energy is used to heat the one or more greenhouses.
6. The method of claim 5 , further comprising recovering carbon dioxide from the biomass power plant and the hydrogen production process, wherein the recovered carbon dioxide is used to supplement the CO 2 concentration of the air inside the one or more greenhouses.
7. The method of claim 1 , wherein the commercial or industrial operations comprises one or more algae farms, and the thermal energy is used to heat the one or more algae farms.
8. The method of claim 7 , further comprising recovering carbon dioxide from the biomass power plant and the hydrogen production process, wherein the recovered carbon dioxide is used to enrich the CO 2 concentration of the sparging air in the one or more algae farms.
9. The method of claim 1 , wherein the hydrogen product has a carbon intensity less than about 0.45 kg CO 2 e/kg H 2 .
10. The method of claim 1 , wherein the hydrogen product has a carbon intensity less than about 0.0 kg CO 2 e/kg H 2 .
11. The method of claim 1 , wherein substantially all of the required energy for the hydrogen production process is provided from the biomass power plant.
12. The method of claim 1 , further comprising providing at least some of the required energy for the commercial or industrial operations from the biomass power plant.