Flowback Gas Conversion to Hydrogen Power Without Flaring
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Solution Overview
Problem
Hydraulic fracturing operations in the oil and gas industry result in the release of gaseous flowback, which includes methane and hydrogen sulfide, leading to environmental impact and unutilized energy if not captured and managed properly, especially in sour reservoirs where hazardous gases are present.
Innovation Solution
A power generation system comprising a hydrogen sulfide separator, hydrocarbon fractionator, hydrogen sulfide processor, methane processor, and hydrogen power generator to capture and process gaseous flowback, separating hydrogen sulfide and hydrocarbons, converting them into usable hydrogen and sulfur, and generating electricity from these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If gaseous flowback is flared or combusted to manage hazardous gases, then harmful factors are reduced, but energy is wasted and environmental impact increases due to carbon dioxide emissions
Solution Approach 1:
The patent converts the harmful gaseous flowback (containing methane and hydrogen sulfide) into a beneficial energy source by processing it through a series of units: H2S separation, hydrocarbon fractionation, and reforming to produce hydrogen-rich syngas that drives a gas turbine for electricity generation. This transforms the waste problem into an energy production opportunity, eliminating flaring while generating power.
Solution Approach 2:
The patent changes the chemical parameters of the gaseous flowback through sequential processing: separating H2S to change composition, fractionating hydrocarbons to change molecular distribution, and reforming to change chemical structure into syngas. These parameter changes enable the gas to become suitable for turbine combustion, converting it from a harmful waste stream to a useful fuel source.
2Loss of energy
If gaseous flowback is captured and processed through multiple separation and conversion units, then energy utilization is improved, but device complexity increases
Solution Approach 1:
The patent segments the complex gas processing task into distinct functional units: H2S separation unit, hydrocarbon fractionation unit, reforming unit, and gas turbine power generation unit. Each unit performs a specific function, making the overall complex process more manageable, controllable, and maintainable while maximizing energy recovery from different components of the gaseous flowback.
3Object-affected harmful factors
If hydrogen sulfide is separated and converted into hydrogen and sulfur, then harmful factors are reduced, but device complexity and processing requirements increase
Solution Approach 1:
The patent converts the hazardous hydrogen sulfide gas into valuable products through the H2S separation unit and subsequent reforming processes. The H2S is transformed into hydrogen (a clean fuel) and sulfur (a marketable byproduct), eliminating the hazard while creating economic value. This approach eliminates the need for traditional harmful disposal methods while reducing overall system complexity compared to flaring infrastructure.
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
The system effectively captures and converts gaseous flowback components into electricity, reducing environmental impact and utilizing otherwise wasted energy, while safely managing hazardous gases from sour reservoirs.
Implementation Method 1
The H2S separator is configured to receive a gaseous flowback stream comprising H2S and gaseous hydrocarbons and separate the gaseous flowback stream into an H2S-containing stream comprising H2S and a desulfurized gaseous flowback stream comprising gaseous hydrocarbons
Implementation Method 2
The H2S processor is configured to receive the H2S-containing stream and convert H2S in the H2S-containing stream into hydrogen and sulfur
Implementation Method 3
The methane processor is configured to receive the methane stream and convert methane in the methane stream into hydrogen and carbon
Implementation Method 4
The hydrogen power generator is configured to receive at least one of the first hydrogen stream and the second hydrogen stream and react hydrogen from at least one of the first hydrogen stream and the second hydrogen stream with oxygen to generate electricity
Data Source
AI summary
A power generation system includes a hydrogen sulfide separator, a hydrocarbon fractionator, a hydrogen sulfide processor, a methane processor, and a hydrogen power generator. The hydrogen sulfide separator separates a gaseous flowback stream into a stream including hydrogen sulfide and a stream including hydrocarbons. The hydrocarbon fractionator fractionates hydrocarbons into methane, ethane and natural gas. The hydrogen sulfide processor converts hydrogen sulfide into hydrogen and sulfur, and the methane processor converts methane into hydrogen and carbon. The hydrogen power generator reacts hydrogen with oxygen to generate electricity. A method for generating electricity from a gaseous flowback includes separating a gaseous flowback stream into a stream including hydrogen sulfide and a stream including hydrocarbons, fractionating hydrocarbons into methane, ethane and natural gas, converting hydrogen sulfide into hydrogen and sulfur, converting methane into hydrogen and carbon, and reacting hydrogen with oxygen to generate electricity.