Hydrogen Production via Integrated Electrolysis and Gasification

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Solution Overview

Problem

Conventional hydrogen production methods, such as 'blue hydrogen' through hydrocarbon gasification, result in significant carbon dioxide emissions, while 'green hydrogen' from water electrolysis is limited by the availability of renewable electricity.

Innovation Solution

An integrated process combining hydrocarbon gasification with carbon capture and water electrolysis, where the electricity for electrolysis is derived from non-hydrocarbon sources like solar, wind, or geothermal energy, producing a hybrid 'cyan hydrogen'.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If hydrogen is produced from hydrocarbon gasification, then productivity is improved, but harmful factors increase due to carbon dioxide emissions

Engineering Contradiction:

Improvehydrogen production capacityVSAvoidcarbon dioxide emissions

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The hydrogen production process is segmented into two distinct pathways: (1) hydrocarbon gasification for high-volume production, and (2) water electrolysis using renewable electricity for low-carbon production. This segmentation allows each method to operate in its optimal range, with gasification providing scale and electrolysis providing environmental sustainability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent merges two previously separate hydrogen production methods (hydrocarbon gasification and water electrolysis) into an integrated system where both processes operate simultaneously and their outputs are combined. This merging enables the system to achieve both high productivity from gasification and low emissions from renewable-powered electrolysis.

Inventive Principle:

Principle #5Merging (Combining)

2Object-generated harmful factors

If hydrogen is produced from water electrolysis using renewable electricity, then harmful factors are reduced, but productivity is limited by availability of renewable energy

Engineering Contradiction:

Improvecarbon dioxide emissionsVSAvoidhydrogen production capacity

Core Design Contradiction:

Object-generated harmful factorsVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated system serves multiple functions simultaneously: it produces hydrogen at high volume through gasification, produces low-carbon hydrogen through electrolysis, and can adjust the mix of these two sources based on renewable energy availability and demand requirements, making the overall system adaptable to varying conditions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Productivity

If hydrocarbon combustion is used to generate electricity for electrolysis, then productivity is improved, but harmful factors increase

Engineering Contradiction:

Improvehydrogen production capacityVSAvoidcarbon dioxide emissions

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

Instead of using hydrocarbon combustion to generate electricity for electrolysis (which would create emissions), the system uses renewable energy sources directly to power the electrolysis process. This converts what would have been a harmful process into a beneficial low-carbon hydrogen production pathway, while the hydrocarbon gasification component handles the bulk production needs.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This process mitigates environmental impact by reducing carbon dioxide emissions and enhances scalability by utilizing renewable energy sources, making hydrogen production more sustainable and efficient.

Implementation Method 1

operating an electrolysis cell with a source of electricity to produce an oxygen stream and a hydrogen stream from water

Methodology Applied

Scientific EffectElectrolysis: Electrolysis

Implementation Method 2

passing the synthesis gas and a water stream to a heat exchanger to produce steam and to cool the synthesis gas

Methodology Applied

Scientific EffectHeat exchange: Heat Exchanger

Data Source

PatentUS20250115476A1Processes for producing hydrogen

Publication Date: 2025.04.10 SAUDI ARABIAN OIL CO

AI summary

According to some embodiments, a process for producing hydrogen may comprise operating an electrolysis cell with a source of electricity to produce an oxygen stream and a hydrogen stream from water, reacting a hydrocarbon feedstock with the oxygen stream to partially oxidize the hydrocarbon feedstock, thereby producing a synthesis gas comprising hydrogen and carbon monoxide; passing the synthesis gas and a water stream to a heat exchanger to produce steam and to cool the synthesis gas; and reacting at least a portion of the synthesis gas from the heat exchanger and at least a portion of the steam from the heat exchanger. The source of electricity to the electrolysis cell for the totality of the operation of the electrolysis cell is not produced from energy provided by the combustion of hydrocarbons;