Methane Catalytic Conversion for Heavy Crude Oil Viscosity Reduction
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Solution Overview
Problem
The transportation of heavy crude oil through pipelines is hindered by high viscosity, especially in cold climates, and the disposal of petroleum gas released during oil extraction poses environmental concerns, as existing methods require costly additives or heating equipment and often result in inefficient gas disposal.
Innovation Solution
Passing methane through a reactor containing crude oil and a solid metallic catalyst at moderate temperatures and pressures to produce a hydrocarbon mixture that can be used to reduce crude oil viscosity and utilize petroleum gas, eliminating the need for costly additives and gas disposal by converting heavy crude oils into upgraded refinery feedstocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If heavy crude oil is transported through pipelines, then the oil can be delivered to processing sites, but the high viscosity of the oil makes pumping difficult especially in cold climates
Solution Approach 1:
The patent changes the chemical composition parameters of the crude oil by introducing methane and using catalytic conversion to produce lighter hydrocarbon components. This fundamentally alters the viscosity-temperature relationship of the oil, enabling pumpable flow at cold temperatures without thermal heating.
Solution Approach 2:
The patent introduces methane as an intermediary substance that reacts with heavy crude oil components through catalytic conversion. This intermediary enables the transformation of heavy, non-pumpable components into lighter, pumpable components that can flow through pipelines in cold climates.
2Temperature
If crude oil is blended with additives such as low-viscosity oils to reduce viscosity, then the oil becomes more mobile for pumping, but this requires relatively large amounts of these additives and is feasible only where light-oil fields or a refinery exist at the same site or nearby
Solution Approach 1:
The patent enables the crude oil system to self-generate the required light hydrocarbon components through in-situ catalytic conversion of methane. Instead of requiring external additives from refineries or light-oil fields, the system produces its own viscosity-reducing components directly at the well site.
Solution Approach 2:
Methane serves as an intermediary material that is converted into light hydrocarbon components through catalytic reaction. This intermediary substance enables viscosity reduction without requiring large quantities of external additive materials to be transported or stored.
3Temperature
If the viscosity of heavy oil is reduced by heating, then the oil becomes more mobile for pumping, but considerable amounts of heat are required in addition to large capital expenditures for equipping the pipelines with heating equipment and insulation
Solution Approach 1:
The patent changes the fundamental physical parameters of the crude oil by converting heavy components into lighter components through chemical reaction. This alters the oil's inherent viscosity characteristics, eliminating the need for thermal energy input to achieve pumpable flow.
Solution Approach 2:
The patent replaces the thermal heating system with a chemical conversion system. Instead of using heat energy to reduce viscosity, the system uses catalytic chemical reactions to transform heavy components into lighter, more mobile components, thereby substituting a mechanical/thermal process with a chemical process.
4Speed
If emulsion is formed by adding water to the oil to increase mobility, then the oil can be pumped through the pipeline, but the emulsion must be formed with the aid of an emulsifier that produces a readily formed, yet stable, emulsion and one that functions in the salinities that are often present in crude oil deposits and in the high temperatures often used to extract the oil from the deposits
Solution Approach 1:
The patent introduces methane as an intermediary substance that chemically reacts with crude oil components to produce light hydrocarbons. This intermediary enables viscosity reduction and mobility improvement without requiring emulsifiers or water addition, thereby simplifying the system.
Solution Approach 2:
The patent extracts and removes the need for emulsion formation technology entirely by using chemical conversion instead. The complex emulsifier system required for water-oil emulsions is replaced by a simpler catalytic conversion process that directly produces mobile hydrocarbon mixtures.
5Loss of substance
If petroleum gas is vented to the atmosphere or combusted in a flare for disposal, then the gas disposal problem is solved, but this raises environmental concerns
Solution Approach 1:
The patent converts the harmful waste product (petroleum gas) into a beneficial resource by using it as a reactant in catalytic conversion. The methane that would otherwise be flared or vented is instead used to produce valuable light hydrocarbon components, thereby eliminating environmental harm while creating useful products.
Solution Approach 2:
The system uses its own waste product (petroleum gas) as a feedstock for the conversion process. This self-service approach eliminates the need for external gas disposal infrastructure and converts the environmental problem into a process advantage.
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 process enhances the mobility of heavy crude oils for pipeline transport without costly additives or heating, and addresses environmental concerns by utilizing petroleum gas, resulting in a hydrocarbon mixture suitable for various applications, including fuels and additives, while reducing gas disposal issues.
Implementation Method 1
passing the methane at moderate temperature and pressure through a reactor that contains both the crude oil and a solid metallic catalyst
Data Source
AI summary
Crude oil is reacted with a methane-containing gas in a process wherein the gas is fed to a reaction vessel to contact both the crude oil and a metallic catalyst grid that is formed from windings of a transition metal supported on an iron frame immersed in a liquid petroleum fraction, at a moderate temperature to produce a gaseous reaction product which is condensed to form an upgraded mixture of hydrocarbons with a variety of uses, including serving as an additive to crude oil for transport purposes.