System for producing energy and biomethane from waste

WO2025177158A3PCT designated stage Publication Date: 2026-06-25NUOVO PIGNONE TECH SRL
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
NUOVO PIGNONE TECH SRL
Filing Date
2025-02-19
Publication Date
2026-06-25

AI Technical Summary

Technical Problem

Waste-to-Energy (WtE) units emit significant carbon dioxide during combustion, and green energy solutions are limited and expensive, necessitating an alternative approach for transitioning from fossil fuels to renewable energy sources.

Method used

A system integrating a WtE unit with a CO2 separation unit, bio-methanation unit, and electrolyzer to convert CO2 into methane using hydrogen gas generated by electrolysis, utilizing renewable electric power to produce oxygen for combustion and separate CO2 from flue gas.

Benefits of technology

This system efficiently captures and utilizes CO2 emissions to produce bio-methane, reducing the carbon footprint while providing energy and heat to user facilities without emissions, enhancing combustion efficiency and reducing NOx and CO emissions.

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Abstract

A system for producing energy and methane includes a waste-to-energy unit configured to produce energy and a flue gas by combusting waste and an oxidizing agent having oxygen and a carbon dioxide (CO2) separation unit configured to separate CO2 from the flue gas to provide separated CO2. The system also includes a bio-methanation unit configured to generate methane (CH4), heat, and water using the separated CO2 received from the CO2 separation unit and received hydrogen (H2) gas. The system further includes an electrolyzer coupled to a source of water (H2O) and an electric power source supplying electricity and configured to split the H2O to generate the oxygen used in the oxidizing agent and the H2 gas used in the bio-methanation unit.
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