Hydrothermal Ceramic Sintering for CO2 Sequestration
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Solution Overview
Problem
The construction and ceramic industries generate significant greenhouse gases, particularly carbon dioxide, during production, and existing methods for carbon capture and sequestration are energy-intensive and inefficient, especially in varying fuel and combustion conditions.
Innovation Solution
A method involving hydrothermal liquid phase sintering (HLPS) where a porous matrix reacts with a greenhouse gas-containing infiltrating medium to form a ceramic product, sequestering the gas through chemical bonding, which can occur under mild conditions and wide ranges of fuel and combustion conditions without efficiency penalties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional high temperature calcining and sintering processes are used for ceramic production, then ceramic products can be obtained, but energy consumption is very high and significant carbon dioxide is generated
Solution Approach 1:
The invention changes the temperature parameter from conventional high temperature (above 900°C) to low temperature (below 900°C, preferably 20-500°C) hydrothermal sintering process. This parameter change enables ceramic production with dramatically reduced energy consumption while maintaining product quality through aqueous medium-assisted sintering
Solution Approach 2:
The invention introduces an aqueous medium as an intermediary substance that facilitates sintering at low temperatures. The water-based liquid phase acts as a mediator enabling particle bonding and ceramic formation without requiring high thermal energy, thus resolving the contradiction between achieving ceramic sintering and minimizing energy consumption
2Quantity of substance
If limestone decomposition is used in cement production, then calcium oxide can be obtained, but significant carbon dioxide is generated
Solution Approach 1:
The invention converts the harmful carbon dioxide emission from limestone decomposition into a beneficial process feature by using CO2-rich aqueous environments (such as seawater or flue gas scrubbing solutions) as the sintering medium. The CO2 that would normally be wasted or harmful is now utilized to create carbonated ceramic products, transforming the harmful factor into a process asset
Solution Approach 2:
The invention extracts and utilizes CO2 from industrial waste streams (flue gas, seawater) to replace traditional limestone decomposition. By taking CO2 out of the emission stream and using it as a reactant in hydrothermal sintering, the process eliminates the need for limestone calcination while producing the same calcium oxide-containing ceramics without CO2 emissions
3Measurement precision
If amine-based capture methods are used for post-combustion CO2 capture, then CO2 capture efficiency is high, but energy costs for cooling flue gas increase and additional CO2 footprint is generated
Solution Approach 1:
The invention merges the CO2 capture function with the ceramic sintering function into a single integrated process. The CO2-rich aqueous stream that would normally require cooling and separate capture treatment is directly used as the sintering medium, combining what were previously separate processes into one operation that eliminates the need for cooling energy input
Solution Approach 2:
The aqueous medium serves multiple functions simultaneously: it acts as the sintering medium for ceramic formation, the CO2 capture medium for sequestering greenhouse gases, and the reaction medium for chemical synthesis. This multi-functionality eliminates the need for separate cooling and capture systems, resolving the energy consumption contradiction
4Manufacturing precision
If conventional milling processes are used for ceramic material preparation, then raw materials can be ground to required size, but energy consumption accounts for significant portion of national energy use
Solution Approach 1:
The invention replaces the mechanical milling system with a chemical hydrothermal system. Instead of using mechanical force to grind particles to required sizes, the process uses aqueous chemistry and low-temperature sintering to directly form ceramics from finer precursors, eliminating the energy-intensive mechanical size reduction step
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 efficiently captures and sequesters greenhouse gases while producing ceramics with improved mechanical properties and reduced energy consumption, capable of withstanding high temperatures and minimizing hydraulic bonding, thus offering an environmentally friendly and cost-effective solution for industrial applications.
Implementation Method 1
A method involving hydrothermal liquid phase sintering (HLPS) where a porous matrix reacts with a greenhouse gas-containing infiltrating medium to form a ceramic product
Implementation Method 2
sequestering the gas through chemical bonding
Implementation Method 3
allowing a solution carrying the at least first reactant to infiltrate at least a substantial portion of the interstitial spaces of the porous matrix
Data Source
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AI summary
A method of sequestering a greenhouse gas is described, which comprises: (i) providing a solution carrying a first reagent that is capable of reacting with a greenhouse gas; (ii) contacting the solution with a greenhouse gas under conditions that promote a reaction between the at least first reagent and the greenhouse gas to produce at least a first reactant; (iii) providing a porous matrix having interstitial spaces and comprising at least a second reactant; (iv) allowing a solution carrying the at least first reactant to infiltrate at least a substantial portion of the interstitial spaces of the porous matrix under conditions that promote a reaction between the at least first reactant and the at least second reactant to provide at least a first product; and (v) allowing the at least first product to form and fill at least a portion of the interior spaces of the porous matrix, thereby sequestering a greenhouse gas.