Integrated Methane-to-Liquids Process for Natural Gas Conversion
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Solution Overview
Problem
The chemicals and fuels industry faces challenges in economically producing high-value chemicals and fuels from natural gas, particularly due to the difficulty in transporting high volumes of natural gas and the inefficiency of existing technologies for converting methane into higher hydrocarbons.
Innovation Solution
The development of integrated systems and processes that convert methane to ethylene and subsequently to various higher hydrocarbon products, using an oxidative coupling membrane reactor system and multiple ethylene conversion reaction systems, allowing for the production of a range of liquid hydrocarbon compositions suitable as chemicals, fuels, or fuel blendstocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If natural gas is transported across vast expanses, then supply availability is improved, but infrastructure costs and complexity increase substantially
Solution Approach 1:
The patent changes the physical state parameter of natural gas from gaseous to liquid form through conversion to higher hydrocarbons. This phase change enables transportation via existing liquid fuel infrastructure rather than requiring complex gas pipeline networks, thereby maintaining supply availability while reducing infrastructure complexity
Solution Approach 2:
The patent introduces higher hydrocarbon liquids as an intermediary substance that bridges the gap between natural gas production and end-use applications. This intermediary enables transport through conventional liquid handling infrastructure, avoiding the need for extensive gas pipeline development
2Productivity
If existing technologies are used to convert methane to higher hydrocarbons, then production capability is provided, but economic viability deteriorates under normal market conditions
Solution Approach 1:
The patent merges multiple process functions into integrated reactor systems that perform oxidative coupling of methane and subsequent hydrocarbon conversions in a unified process architecture. This integration reduces capital expenditure and operational complexity, improving economic viability while maintaining production capability
Solution Approach 2:
The patent employs multi-functional catalyst systems and reactor designs that can produce multiple higher hydrocarbon products (ethylene, propane, butanes, etc.) from a single methane feedstock input. This versatility allows optimization based on market conditions, improving economic viability by producing the most valuable products at any given time
3Ease of operation
If methane is converted to liquid hydrocarbon products, then transportation ease is improved, but conversion process complexity increases
Solution Approach 1:
The patent combines the oxidative coupling of methane with subsequent hydrocarbon conversion reactions in integrated reactor systems. By merging these sequential transformations into unified process units, the patent simplifies the overall conversion process complexity while achieving the desired liquid hydrocarbon products for easy transportation
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 enables the efficient conversion of methane to high-value liquid hydrocarbon products, overcoming transportation hurdles and providing a cost-effective method for utilizing abundant natural gas resources, thereby addressing the limitations of existing technologies.
Implementation Method 1
introducing methane and a source of oxidant into an OCM reactor system capable of converting methane to ethylene
Implementation Method 2
contacting separate portions of the product gas with at least two discrete catalytic reaction systems
Data Source
AI summary
Integrated systems are provided for the production of higher hydrocarbon compositions, for example liquid hydrocarbon compositions, from methane using an oxidative coupling of methane system to convert methane to ethylene, followed by conversion of ethylene to selectable higher hydrocarbon products. Integrated systems and processes are provided that process methane through to these higher hydrocarbon products.