Plastic Pyrolysis and Reforming for Hydrogenated Liquid Fuel

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Solution Overview

Problem

The reliance on non-renewable liquid hydrocarbon fuels increases greenhouse gas emissions, and there is a need to efficiently generate useful products, particularly fuels and hydrogen, from waste plastics.

Innovation Solution

A process involving fast pyrolysis of plastics to produce hydrogen and liquid fuels like naphtha, using a system comprising a pyrolysis reactor, condenser, steam gasification reactor, reforming system, and hydrogenation reactor, with catalysts and sorbents to capture CO2, converting double carbon bonds to single bonds and separating hydrogen and carbon dioxide.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If liquid hydrocarbon fuels are obtained from crude oil, then transportation and energy needs are met, but greenhouse gas emissions increase significantly

Engineering Contradiction:

Improveenergy supply for transportationVSAvoidgreenhouse gas emissions

Core Design Contradiction:

Use of energy by moving objectVSObject-generated harmful factors

Solution Approach 1:

The invention changes the source material parameter from crude oil to waste plastics, and transforms the chemical composition through pyrolysis and catalytic reforming processes to produce hydrocarbon fuels with similar properties to petroleum-based fuels, thereby maintaining energy supply while reducing greenhouse gas emissions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention converts waste plastics, which are harmful environmental pollutants, into valuable liquid hydrocarbon fuels and hydrogen. The pyrolysis process transforms the harmful plastic waste into useful energy carriers, turning an environmental problem into a beneficial resource

Inventive Principle:

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

2Productivity

If waste plastics are converted into useful products, then resource efficiency improves and crude oil fuel use decreases, but the conversion process complexity increases

Engineering Contradiction:

Improveresource efficiencyVSAvoidconversion process complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The conversion process is divided into distinct sequential stages: pyrolysis reactor for plastic decomposition, condenser for product separation, steam gasification reactor for further conversion, and reforming system for final fuel synthesis. This segmentation allows each unit to perform a specific function efficiently while maintaining overall process manageability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pyrolysis system is designed to process various types of waste plastics (polyethylene, polypropylene, polystyrene) and produce multiple useful products simultaneously (liquid hydrocarbon fuels, hydrogen, and energy). This multi-functionality maximizes resource efficiency from a single input material

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Efficient conversion of waste plastics into hydrogen and liquid fuels while capturing CO2, reducing atmospheric emissions and utilizing waste materials effectively.

Implementation Method 1

A pyrolysis reactor may receive a supply of plastics and perform a pyrolysis process on the plastics

Methodology Applied

Scientific EffectPyrolysis: Pyrolysis

Implementation Method 2

A steam gasification reactor may receive the hydrocarbon based gases and perform a gasification process to generate hydrogen and other gases

Methodology Applied

Scientific EffectGasification:

Implementation Method 3

A reforming system may receive the gases generated by the gasification process and perform reforming processes on the gases to generate hydrogen

Methodology Applied

Scientific EffectReforming:

Implementation Method 4

The pyrolysis reactor output conduit may supply the gases generated by the pyrolysis process to a condenser so that at least some of the medium and/or heavy hydrocarbon based gasses condense

Methodology Applied

Scientific EffectCondensation: Condensation

Data Source

PatentUS20250340784A1Method of preparing hydrogen and liquid fuel from a plastic feedstock

Publication Date: 2025.11.06 QUANTAFUEL ASA

AI summary

Disclosed herein is a method of preparing hydrogen and liquid fuel from a feedstock that comprises plastics, the method comprising: generating a first gas stream, that is a pyrolysis gas, by performing a pyrolysis process on the feedstock; condensing some of the first gas stream to generate a second gas stream and pyrolysis oil, wherein the second gas stream is a light component of the pyrolysis gas; performing a reforming process on the second gas stream to generate hydrogen; and generating liquid fuel by performing a hydrogenation process on the pyrolysis oil; wherein the hydrogenation process reacts the pyrolysis oil with at least some of the generated hydrogen by the reforming process.