Biomass Ash CO2 Absorbent for Low-Cost Carbon Capture
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Solution Overview
Problem
Existing carbon dioxide absorption methods using alkali earth metals or alkali metals are costly and pose environmental concerns due to the difficulty in obtaining large quantities and the environmental impact of discarding these substances, affecting their use in various combustion apparatuses.
Innovation Solution
A carbon dioxide absorbent utilizing biomass combustion ash, specifically calcium oxide, which reacts with water to form calcium hydroxide and subsequently absorbs CO2 to produce calcium carbonate, reducing environmental impact and costs by utilizing a carbon-neutral, low-cost, and abundant material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alkali earth metal or alkali metal is used for carbon dioxide absorption, then carbon dioxide absorption capability is improved, but cost increases and environmental load increases
Solution Approach 1:
The patent converts biomass combustion ash, which would normally be discarded as waste, into an effective carbon dioxide absorbent. This transforms a harmful waste disposal problem into a beneficial carbon capture solution, eliminating the need for expensive alkali metals while reducing environmental load from both the absorbent material and waste ash
Solution Approach 2:
The patent uses biomass combustion ash as a low-cost, readily available absorbent material that can be disposed of after use without significant environmental impact. This replaces expensive alkali metals with an abundant, inexpensive alternative that does not require recovery or special handling after carbon dioxide absorption
2Reliability
If alkali earth metal or alkali metal is used for carbon dioxide absorption, then carbon dioxide absorption capability is improved, but cost increases
Solution Approach 1:
The patent employs biomass combustion ash, which is abundantly available and costs virtually nothing compared to alkali metals. The ash is used as a single-use absorbent that is discarded after carbon dioxide capture, eliminating the need for expensive material purchases and recovery processes
Solution Approach 2:
The patent utilizes biomass combustion ash that is already produced by thermal power plants as a byproduct. This self-service approach allows the plant to use its own waste material for carbon dioxide absorption, eliminating the need to purchase external chemicals and reducing overall operational costs
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 biomass-based carbon dioxide absorbent effectively absorbs CO2 without imposing a significant environmental load and at a lower cost, utilizing biomass ash from thermal power plants or biomass incineration facilities, thereby reducing industrial carbon emissions.
Implementation Method 1
the biomass combustion ash including calcium oxide
Implementation Method 2
absorbs CO2 to produce calcium carbonate
Data Source
AI summary
Provided is a carbon dioxide absorbent for absorbing carbon dioxide included in a gas. The carbon dioxide absorbent includes biomass combustion ash that is combustion ash of biomass, the biomass combustion ash including calcium oxide. The biomass may include at least one of wood, a livestock excrement, sewage sludge, or an agricultural residue. The biomass may be excrement evacuated by a chicken for a chicken egg. The carbon dioxide absorbent may be slurry including the biomass combustion ash and water. The carbon dioxide absorbent may be a granule, and may include the biomass combustion ash and a binder.