US 2026/0218072 A1 · HYDROGEN PRODUCTION AND OFF-GAS UTILISATION FROM A BIOMASS-BASED SYNTHESIS GAS

Abstract

System and method of hydrogen production from a biomass-based synthesis gas in a biomass-based hydrogen production system including a pyrolysis reactor and a gasification reactor. A biomass feedstock is pyrolyzed in a pyrolysis reactor to produce a pyrolysis gas and a solid pyrolysis char. The pyrolysis gas is partially oxidized into an oxidized pyrolysis gas by providing an oxidizing gas and gasifying the pyrolysis char in a gasification reactor using the partially oxidized pyrolysis gas to produce a synthesis gas. The synthesis gas has a high content of hydrogen molecules. The synthesis gas is separated into two streams, one being a hydrogen-rich stream and the other being an off-gas stream. The off-gas stream includes hydrogen at a lower concentration than in the hydrogen-rich stream, and other synthesis gas elements. Energy (mechanical, electrical and/or thermal) is extracted from the off-gas, and that energy is used to provide power to the production system.

Claims21

Dependent claims

Method of hydrogen production from a biomass-based synthesis gas in a biomass-based hydrogen production system, wherein the biomass-based hydrogen production system comprises a pyrolysis reactor and a gasification reactor, the method comprising the steps of:

providing a biomass feedstock,
pyrolysing the biomass feedstock in the pyrolysis reactor to produce a pyrolysis gas and solid pyrolysis char,
at least partially oxidizing the pyrolysis gas into an oxidized pyrolysis gas by providing an oxidizing gas,
gasifying the pyrolysis char in the gasification reactor using the at least partially oxidized pyrolysis gas to produce a synthesis gas, the synthesis gas having a high content of hydrogen molecules, H2,
separating the synthesis gas into two streams, one being a hydrogen-rich stream and the other being an off-gas stream, wherein the off-gas stream comprises hydrogen at a lower concentration than in the hydrogen-rich stream, and other synthesis gas elements,
extracting mechanical energy, electrical energy and/or thermal energy from the off-gas by way of an energy conversion system, and using said mechanical, electrical, and/or thermal energy to provide power to the biomass-based hydrogen production system.

3 more elements

Biomass-based hydrogen production system, the system comprising:

a pyrolysis reactor comprising a biomass feedstock inlet and a pyrolysis gas and char outlet, wherein the pyrolysis reactor is adapted for pyrolysis of a biomass feedstock into a pyrolysis gas and a pyrolysis char,
a gasification reactor in communication with the pyrolysis gas and char outlet, the gasification reactor further comprising a synthesis gas outlet, wherein the gasification reactor is adapted for gasification of the pyrolysis char using the pyrolysis gas, to produce a synthesis gas exiting the gasification reactor via the synthesis gas outlet,
a synthesis gas separator in communication with the synthesis gas outlet, wherein the synthesis gas separator is adapted for separating the synthesis gas into a hydrogen rich stream output via a hydrogen rich stream output, and an off-gas stream output via an off-gas output, wherein the synthesis gas separator is adapted to ensure during operation that the off-gas stream comprises hydrogen at a lower concentration than in the hydrogen rich stream, and
an energy conversion system connected to the off-gas stream output, wherein the energy conversion system is adapted to generate mechanical energy, electrical energy, and/or thermal energy from the off-gas, and for providing said mechanical, electrical, and/or thermal energy to at least partly power the biomass-based hydrogen production system.

1 more element

Dependencies are inferred from the claim text.

Hydrogen production and off-gas utilisation from a biomass-based synthesis gas

Life of this patent

Hydrogen production and off-gas utilisation from a biomass-based synthesis gas

Life of this patent

Abstract

Claims21