Metal Oxide Oxygen Carrier for Feedstock Depolymerization
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Solution Overview
Problem
Existing processes for converting carbonaceous feedstocks to soluble products and biodegradable substrates require high temperatures, pressures, and expensive solvents or oxidizers, making them uneconomical and incompatible with microbial conversion steps.
Innovation Solution
A method involving a metal oxide oxygen carrier, where a metal oxide with a higher oxidation state is reduced to a lower oxidation state to oxidize carbonaceous feedstocks, and then recycled back to its higher oxidation state for reuse, using mild conditions and specific metal oxides like transition metals to facilitate oxidative depolymerization and solubilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high temperature and pressure are used for gasification or liquefaction, then conversion of carbonaceous feedstocks to soluble products is achieved, but energy consumption and operating costs increase significantly
Solution Approach 1:
The invention changes the reaction parameters from extreme temperature and pressure conditions to mild conditions by introducing metal oxide catalysts that enable oxidation at lower temperatures, thereby reducing energy consumption while maintaining conversion efficiency
Solution Approach 2:
Metal oxide catalysts serve as intermediaries that facilitate the oxidation reaction between carbonaceous feedstocks and oxygen, enabling the reaction to proceed under milder conditions without requiring high temperature and pressure
2Quantity of substance
If expensive solvents and oxidizers are used for depolymerization, then solubilization of carbonaceous feedstocks is achieved, but raw material costs increase
Solution Approach 1:
The invention uses inexpensive metal oxide catalysts that can be readily regenerated and reused, replacing expensive solvents and oxidizers while maintaining solubilization efficiency
Solution Approach 2:
The metal oxide catalysts are recovered from the reaction mixture and regenerated by simple heating in air, eliminating the need for expensive solvent recovery processes and reducing raw material costs
3Reliability
If high temperature gasification is used to produce syngas, then clean fuels can be produced, but capital investment and process complexity increase
Solution Approach 1:
The invention segments the complex gasification process into simpler oxidation and combustion stages using metal oxide catalysts, reducing process complexity while maintaining fuel quality
Solution Approach 2:
Metal oxide catalysts act as intermediaries that simplify the conversion process by enabling direct oxidation of carbonaceous feedstocks to soluble products, eliminating the need for complex syngas cleanup and conversion equipment
4Quantity of substance
If direct liquefaction with hydrogenation is used, then liquid hydrocarbon products are produced, but hydrogen consumption and energy requirements increase
Solution Approach 1:
The invention changes the chemical environment from reducing (hydrogenation) to oxidizing conditions, enabling liquid product formation without hydrogen consumption and reducing energy requirements
Solution Approach 2:
Metal oxide catalysts serve as intermediaries that facilitate oxygen transfer to carbonaceous feedstocks, enabling direct formation of oxygenated liquid products without requiring hydrogenation steps
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 method reduces energy and raw material costs, produces biodegradable and soluble products, and enhances the economic viability of converting carbonaceous feedstocks to clean fuels and industrial raw materials, while being compatible with microbial conversion steps.
Implementation Method 1
reacting a mixture of the carbonaceous feedstock with a metal oxide including a metal at a first, higher oxidation state to reduce the metal of the metal oxide to a second, lower oxidation state by releasing at least one oxygen atom to oxidize at least one component of the carbonaceous feedstock
Implementation Method 2
oxidizing at least a portion of the metal or metal oxide containing the metal at the second, lower oxidation state to the first, higher oxidation state
Data Source
AI summary
A method for solubilizing a carbonaceous feedstock. The method includes steps of reacting a mixture of the carbonaceous feedstock with a metal oxide including a metal at a first, higher oxidation state to reduce the metal of the metal oxide to a second, lower oxidation state by releasing at least one oxygen atom from the metal oxide. The released oxygen from the metal oxide is used to oxidize the carbonaceous feedstock. At least a portion of the metal or metal oxide containing the metal at the second, lower oxidation state is then oxidized to the metal oxide containing the metal at the first, higher oxidation state for reuse in the reaction step.