Carbon Dioxide Recycling to Methanol Fuel
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Solution Overview
Problem
The combustion of natural gas contributes to global warming due to the release of carbon dioxide, a greenhouse gas, and existing methods of carbon sequestration are costly and potentially dangerous, while carbon dioxide produced during natural gas production is often released into the atmosphere without utilization.
Innovation Solution
A method involving the capture, purification, and chemical recycling of carbon dioxide from natural gas combustion to produce methanol or dimethyl ether, which can be reused as fuels or chemical feedstocks, thereby closing the carbon cycle and preventing atmospheric release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If natural gas is combusted to produce energy, then energy is generated, but carbon dioxide is released into the atmosphere contributing to global warming
Solution Approach 1:
The patent converts the harmful carbon dioxide emissions from natural gas combustion into a beneficial resource by capturing and recycling CO2 to produce methanol fuel. The combustion process that generates energy also produces CO2, which is then fed back into the system to create new fuel, transforming the harmful emission into a valuable feedstock for renewable fuel production.
Solution Approach 2:
Instead of discarding carbon dioxide emissions into the atmosphere, the patent implements a recovery system that captures CO2 from combustion flue gas and natural gas production streams. The captured CO2 is purified and reused as a feedstock for methanol synthesis, preventing its release while maintaining energy production functionality.
2Object-generated harmful factors
If carbon dioxide is captured and sequestered underground, then carbon dioxide emissions are reduced, but the process is costly and presents potential safety risks
Solution Approach 1:
Rather than treating CO2 sequestration as a costly disposal problem, the patent transforms CO2 into a valuable chemical feedstock for methanol production. This approach eliminates the need for expensive underground injection infrastructure and associated safety monitoring, while creating an additional revenue stream from fuel production.
Solution Approach 2:
The system creates a self-sustaining cycle where CO2 emissions from natural gas combustion and production are automatically captured and converted back into fuel. The process uses its own emissions as feedstock, eliminating the need for external sequestration facilities and creating a closed-loop system that is both economically and safety-wise superior to traditional sequestration methods.
3Manufacturing precision
If carbon dioxide is separated during natural gas production, then natural gas quality is improved, but the separated carbon dioxide is usually released into the atmosphere without utilization
Solution Approach 1:
The patent implements recovery of the separated CO2 stream that would otherwise be discarded. The CO2 separation unit that improves natural gas quality also feeds purified CO2 into the methanol synthesis unit, transforming a waste stream into a valuable feedstock and eliminating atmospheric emissions.
Solution Approach 2:
The CO2 separation equipment serves dual functions: it purifies natural gas for combustion while simultaneously providing a concentrated CO2 feedstock for fuel synthesis. This multi-functionality eliminates the need for separate CO2 capture infrastructure and maximizes the value of the separation process.
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 renders natural gas an environmentally neutral fuel, reducing carbon footprints by continuously recycling carbon dioxide, avoiding costly sequestration, and providing a regenerative carbon source for producing methanol and dimethyl ether, thus mitigating greenhouse gas emissions.
Implementation Method 1
capturing the produced carbon dioxide on an adsorbent
Implementation Method 2
The adsorbent is treated with, for example, sufficient heating, reduced pressure, vacuum, gas purge, or a combination thereof to release the captured carbon dioxide
Implementation Method 3
carbon dioxide is electrochemically reduced to formic acid and related intermediates
Implementation Method 4
reacting the carbon dioxide with a suitable natural gas (methane) or hydrocarbon source and steam under steam reforming reaction conditions sufficient to form a mixture of hydrogen and carbon monoxide
Implementation Method 5
reacting the carbon dioxide with a suitable natural gas source (methane) under dry reforming reaction conditions sufficient to form another mixture of hydrogen and carbon monoxide
Implementation Method 6
The hydrogen and carbon monoxide produced in the steam and dry reforming are then combined for an overall bi-reforming process to form a mixture of hydrogen and carbon monoxide in a molar ratio of about 2 moles of hydrogen to 1 mole of carbon monoxide for reaction to form methanol or dimethyl ether
Implementation Method 7
Methanol produced according to the invention is dehydrated by removing water under conditions sufficient to produce dimethyl ether
Data Source
AI summary
The invention provides a method for rendering natural gas as an environmentally essentially carbon dioxide-neutral fuel. Carbon dioxide produced from natural gas combustion or from natural gas wells is captured, purified, combined with natural gas or methane or with hydrogen, and reacted under reaction conditions sufficient to form methanol and/or dimethyl ether, which can be used as fuel or feedstock for derived synthetic hydrocarbons and products.