Low-Temperature Binder Sorbent for Multipollutant Control
Solution Overview
Problem
Current methods for producing shaped activated carbon pellets for multipollutant control in coal-fired power plants require high temperature processing, leading to excessive emissions and reduced adsorption capacity, while lower temperature methods lack stability for high-temperature applications, necessitating a solution for producing high mechanical strength sorbents with improved multipollutant treatment capacity at reduced costs.
Innovation Solution
A method involving blending base sorbent materials with binders and additives, followed by low-temperature drying, to create sorbent products that are powdered, granular, or pelletized, allowing for simultaneous removal of multiple pollutants like sulfur oxides, nitrogen oxides, and mercury, with the sorbent products being thermally stable up to 450°C and maintaining mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high temperature processing is used to produce shaped activated carbon pellets, then mechanical strength is improved, but adsorption capacity is reduced and excessive emissions are generated
Solution Approach 1:
The patent changes the temperature parameter from high temperature processing to low temperature drying (below 200°C, preferably 50-150°C), which preserves the adsorption capacity of the activated carbon while still achieving adequate mechanical strength through the binder system
Solution Approach 2:
The patent introduces a binder as an intermediary substance that holds the activated carbon particles together at low temperatures, replacing the need for high temperature processing to achieve mechanical strength. The binder acts as a mediator between the particles, providing structural integrity without compromising adsorption capacity
2Strength
If high temperature processing is used to produce shaped activated carbon pellets, then mechanical strength is improved, but harmful emissions are increased
Solution Approach 1:
The patent changes the processing temperature parameter from high temperature to low temperature drying (below 200°C), which eliminates the generation of excessive emissions while still achieving the required mechanical strength through alternative means (binder system)
3Reliability
If multiple separate technologies are used to remove different pollutants, then each pollutant can be controlled effectively, but capital costs and device complexity increase
Solution Approach 1:
The patent creates a universal sorbent product that can simultaneously remove multiple pollutants (SOx, NOx, mercury, VOCs) through a single device, eliminating the need for multiple separate pollution control technologies and reducing overall system complexity
Solution Approach 2:
The patent merges the functionality of multiple pollutant removal technologies into a single sorbent-based system that can handle sulfur oxides, nitrogen oxides, mercury, and volatile organic compounds simultaneously, reducing capital costs and simplifying the pollution control 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 method enables the simultaneous control of multiple pollutants using a single device, reducing capital costs and waste streams, while maintaining the sorbent's integrity and adsorption capacity, and is suitable for various applications including moving fixed beds for pollution control and regeneration.
Implementation Method 1
blending base sorbent materials with binders and additives
Implementation Method 2
simultaneous removal of multiple pollutants from process gas
Data Source
AI summary
A sorbent product, including from about 1 wt % to about 99 wt %, based on the total weight of the sorbent product, of at least one base sorbent material; and from about 1 wt % to about 99 wt %, based on the total weight of the sorbent product, of at least one binder. The sorbent product may further include at least from about 0 wt % to about 99% wt %, based on the total weight of the sorbent product, of at least one additional additive. Methods for making same and methods and systems for controlling multiple pollutants are also included.