Integrated Bio-Methanol Production System for Emission Reduction
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Solution Overview
Problem
Conventional liquid biofuel production techniques face challenges due to high energy and reactant requirements, leading to technical and economic issues, as well as elevated fossil fuel emissions.
Innovation Solution
An integrated process and system for producing bio-methanol using biomass in an anaerobic digester to produce biogas, which is then converted into syngas using renewable and nuclear-sourced electricity, and subsequently into bio-methanol, with the ability to store and utilize bio-methanol for transportation fuel or generate electricity during peak demand, while minimizing fossil fuel-derived greenhouse gas emissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional liquid biofuel production techniques are used, then biofuel can be produced from various feedstocks, but energy and reactant requirements are high leading to elevated fossil fuel emissions
Solution Approach 1:
The patent changes the energy source parameter from fossil fuels to renewable sources (solar, wind, hydroelectric) and nuclear sources, fundamentally altering the emission profile while maintaining production capability. This parameter change directly addresses the contradiction by decoupling energy requirements from fossil fuel dependency.
Solution Approach 2:
The system uses by-product heat from partial oxidation and water electrolysis to maintain anaerobic digester temperature, creating a self-sustaining thermal system. This self-service approach reduces external energy requirements and eliminates the need for additional fossil fuel combustion for heating, thereby reducing emissions while meeting energy demands.
2Object-generated harmful factors
If biomass is converted to biogas and then to syngas using renewable electricity, then fossil fuel emissions are reduced, but the process complexity increases
Solution Approach 1:
The patent merges multiple functions into integrated units: the partial oxidation unit combines combustion with syngas production, the water electrolysis unit combines hydrogen production with oxygen generation for use in partial oxidation, and the system integrates renewable energy sources with the conversion process. This merging reduces overall process complexity compared to separate, standalone units for each function.
Solution Approach 2:
The system employs multi-functional components where by-product heat serves dual purposes (process heating and digester maintenance), electricity serves multiple functions (electrolysis power and potential generator fuel), and the bio-methanol product serves both as transportation fuel and as generator fuel during peak demand. This universality simplifies the overall system architecture by eliminating dedicated single-purpose equipment.
3Object-generated harmful factors
If bio-methanol is produced and stored for transportation fuel, then fossil fuel usage is displaced, but storage infrastructure requirements increase
Solution Approach 1:
The system dynamically adjusts bio-methanol allocation based on real-time electricity demand conditions. During low-demand periods, bio-methanol is produced and stored for transportation fuel use. During peak-demand periods, stored bio-methanol is converted to electricity via generators. This dynamic flexibility allows the system to optimize between storage accumulation and immediate utilization, reducing the need for large permanent storage infrastructure.
Solution Approach 2:
The system changes the state and utilization parameter of bio-methanol based on demand conditions - maintaining it as a liquid fuel product during low demand, and converting it to electricity generation mode during peak demand. This parameter change allows the same infrastructure to serve multiple purposes, effectively reducing the volume of dedicated storage infrastructure needed.
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 approach reduces fossil fuel-derived greenhouse gas emissions and enables the production of a sustainable, carbon-neutral biofuel that can be used as a transportation fuel or for electricity generation, balancing electricity demand and supply while maintaining overall greenhouse gas neutrality.
Implementation Method 1
supplying biomass to an anaerobic digester for producing biogas comprising methane and carbon dioxide
Implementation Method 2
supplying the biogas and oxygen sourced from water using renewable and/or nuclear-sourced electricity to a partial oxidation unit to produce non fossil fuel-sourced syngas
Implementation Method 3
supplying water to a water electrolysis unit to produce electrolysis oxygen and electrolysis hydrogen
Implementation Method 4
supplying the syngas with hydrogen sourced from water using renewable and/or nuclear-sourced electricity to a synthesis unit for producing bio-methanol
Implementation Method 5
supplying at least a portion of the bio-methanol to a generator for intermittently producing electricity
Data Source
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AI summary
Methods and systems for producing bio-methanol can include anaerobic digestion of a biomass feedstock to produce biogas including methane and carbon dioxide, partial oxidation of the biogas with oxygen from water electrolysis to produce syngas, synthesizing bio-methanol from the syngas and hydrogen from the water electrolysis, storing the bio-methanol during off-peak electricity demand, intermittently generating electricity from the bio-methanol during peak electricity demand and using such electricity for the water electrolysis. The techniques provide a route for the production of bio-methanol without the engagement of fossil fuels as feedstocks and mitigating fossil fuel derived greenhouse gas emissions from processing and utilization of transportation fuels and commercial or industrial alcohols.