High Reactivity Lime Hydrate Additives for Acid Gas Neutralization
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Solution Overview
Problem
Traditional calcium hydroxide (lime hydrate) is not reactive enough for in-flight acid gas neutralization in flue gas scrubbing systems, leading to inefficiencies and downstream issues due to its limited reactivity and potential for clogging, especially in systems lacking the necessary machinery for producing high reactivity forms.
Innovation Solution
The formation of high reactivity calcium hydroxide (HRH) through the addition of specific additives to traditional calcium hydroxide, enhancing its reactivity and BET surface area, allowing for faster neutralization of acid gases, and potentially producing Super Reactive Hydrates (SRH) with even higher reactivity and surface area for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional calcium hydroxide is used for acid gas neutralization, then the system is simple and easy to operate, but the reactivity is insufficient leading to neutralization inefficiency
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of calcium hydroxide through additive incorporation. Specific additives are introduced to change the reactivity parameter and BET surface area parameter of the sorbent material, transforming traditional low-reactivity calcium hydroxide into high-reactivity forms without fundamentally changing the neutralization system architecture
Solution Approach 2:
The patent employs composite materials by creating enhanced calcium hydroxide compositions that incorporate specific additives. These composite sorbent materials combine calcium hydroxide with additive components to achieve superior reactivity and surface area properties, resolving the contradiction between neutralization efficiency and system complexity
2Productivity
If traditional lime hydrate is used, then the manufacturing process is simple, but the BET surface area is insufficient leading to slow reaction kinetics
Solution Approach 1:
The patent changes the physical-chemical parameters of lime hydrate by incorporating additives during manufacturing. This modifies the BET surface area parameter and particle morphology parameters, enabling faster reaction kinetics while maintaining a relatively simple manufacturing process that builds upon traditional lime hydrate production methods
3Reliability
If excess sorbent is used to compensate for low reactivity, then neutralization coverage is improved, but downstream clogging issues increase
Solution Approach 1:
The patent changes the reactivity parameter of the sorbent material through additive incorporation, enabling effective neutralization coverage with reduced sorbent dosages. This parameter modification resolves the contradiction by achieving complete neutralization with smaller, less problematic particle quantities that cause minimal downstream clogging
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 enhanced reactivity and surface area of HRH and SRH enable effective in-flight neutralization of acid gases, reducing the need for excess sorbent and minimizing downstream issues, making them suitable for use in applications where traditional lime hydrates are insufficient, and allowing for more efficient flue gas treatment.
Implementation Method 1
the calcium hydroxide particles have a reactivity of less than 10 seconds and a BET surface area of 20 m2/g or greater
Implementation Method 2
the formation of high reactivity calcium hydroxide (HRH) through the addition of various materials to a traditionally manufactured calcium hydroxide (lime hydrate)
Data Source
AI summary
Systems and Methods to produce a lime hydrate sorbent composition formed of highly reactive lime hydrate (HRH) by adding compounds to the slaking water in a method that would produce a non-HRH, which will typically be a lime hydrate having citric acid reactivity as discussed above of more than ten seconds, to make the non-HRH an HRH, which is having a citric acid reactivity of less than or equal to ten seconds.