Raw Natural Gas Conversion to Liquid Hydrocarbons
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Solution Overview
Problem
Current methods for converting raw natural gas into aromatic hydrocarbons often require existing infrastructure for purification and fractionation, which is not feasible in remote locations, leading to energy wastage and health hazards from flaring unprocessed gas.
Innovation Solution
A method and system that convert unpurified raw natural gas into liquid hydrocarbons and generate power by reacting the gas in a reactor to produce a higher molecular weight hydrocarbon stream, separating it into a tail gas and a liquid stream, and combusting the tail gas to generate power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If existing infrastructure for purification and fractionation is used to convert raw natural gas into aromatic hydrocarbons, then the conversion process can be performed, but it is not feasible in remote locations and requires significant infrastructure investment
Solution Approach 1:
The patent segments the complex purification and fractionation infrastructure into a simplified two-step process: (1) direct catalytic conversion of raw natural gas to aromatic hydrocarbons in a reactor, and (2) separation of the product stream. This eliminates the need for extensive purification facilities while maintaining conversion feasibility.
Solution Approach 2:
The patent extracts and eliminates the intermediate purification and fractionation steps from the conventional process flow. By directly converting raw natural gas without removing impurities first, the system removes the need for complex infrastructure while still achieving the desired aromatic hydrocarbon production.
2Device complexity
If raw natural gas is flared due to lack of processing infrastructure, then infrastructure investment is avoided, but energy is wasted and health hazards occur
Solution Approach 1:
The patent converts the previously harmful act of flaring raw natural gas into a beneficial process by using the same raw gas as feedstock for aromatic hydrocarbon production. The catalyst system enables direct conversion of what was previously wasted material into valuable liquid fuels and chemicals, eliminating energy loss while requiring minimal infrastructure.
Solution Approach 2:
The system enables remote locations to serve their own energy needs by converting locally available raw natural gas into liquid hydrocarbons and power on-site. The tail gas from the conversion process is combusted to generate electricity, creating a self-sufficient energy system that eliminates the need for external infrastructure.
3Device complexity
If raw natural gas is flared, then processing infrastructure is not required, but health risks from flaring increase
Solution Approach 1:
The patent eliminates the harmful flaring process by converting raw natural gas into valuable aromatic hydrocarbons through catalytic reaction. This removes the source of health hazards while transforming the wasted gas into beneficial liquid fuels, protecting remote communities from flaring-related health risks.
4Productivity
If purification and fractionation are performed before conversion, then the conversion process can proceed efficiently, but the process becomes more complex and requires existing infrastructure
Solution Approach 1:
The patent performs the conversion action before purification by using a catalyst that can directly process raw natural gas containing impurities. The catalyst is designed to tolerate and convert the raw gas composition directly into aromatic hydrocarbons, eliminating the need for preliminary purification steps while maintaining conversion efficiency.
Solution Approach 2:
The patent inverts the conventional process sequence by performing catalytic conversion first and then separating the product stream, rather than purifying and fractionating before conversion. This reversal simplifies the overall process while maintaining productivity, as the catalyst system is designed to handle raw gas composition directly.
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 production of liquid hydrocarbons and on-site power generation from raw natural gas without the need for initial purification, reducing energy wastage and health risks associated with flaring, while providing a reliable and efficient energy source in remote areas.
Implementation Method 1
reacting the first stream in a reactor to form a second stream having at least a portion of the methane converted to a higher molecular weight hydrocarbon
Implementation Method 2
separating the second stream into a tail stream that is enriched in methane and a product stream enriched in the higher molecular weight hydrocarbon
Implementation Method 3
combusting at least a portion of the tail stream to generate power
Data Source
AI summary
Systems and a method are provided for producing an aromatic hydrocarbon and generating electricity from a tail gas stream. The method includes feeding a first stream including a raw natural gas into a reactor. The method includes converting the first stream, at least in part, to a second stream including an aromatic hydrocarbon within the reactor. The method includes separating the second stream into a tail gas stream and a liquid aromatic hydrocarbon stream and combusting at least a portion of the tail gas stream to generate electricity.