DIRECT CAPTURE OF CARBON DIOXIDE

Smart overview of the Invention

Innovative systems and methods are introduced for capturing carbon dioxide directly from the air using a calcium sorbent. This approach allows for large-scale, cost-effective implementation by utilizing a thin coating of calcium sorbent on substrates. The process involves chemisorption, where carbon dioxide is absorbed onto the sorbent, which can then be disposed of or regenerated to release the captured carbon dioxide. This method addresses the need for efficient carbon capture technologies amidst growing concerns over climate change and greenhouse gas emissions.

Background

The global challenge of rising greenhouse gases, especially carbon dioxide, has prompted efforts to develop methods not only to reduce emissions but also to actively remove existing atmospheric CO2. Current capture technologies face hurdles such as high costs and inefficiencies, making them impractical on an industrial scale. These methods often require expensive chemicals and energy-intensive processes, including the regeneration of sorbents and active air flow systems, which add to their overall cost and complexity.

Key Features

The proposed systems maximize the surface area of calcium sorbents, enhancing their ability to capture CO2 directly from ambient air while minimizing costs associated with production and logistics. By employing a passive air capture process, these systems can efficiently mitigate atmospheric CO2 accumulation. The design focuses on accelerating carbonation through optimal sorbent thickness on substrates, allowing rapid and thorough carbonation without the need for costly chemicals or active processes.

Advantages

• Low-cost sorbents reduce overall expenses compared to traditional methods.
• The system operates efficiently without requiring complete sorbent regeneration.
• No forced air components are necessary, allowing for high-efficiency absorption even with slower reaction times.
• An integrated production and capture process streamlines operations.

Implementation

The system involves passive calcium chemisorbent carbonation using substrates that can be either stationary or circulating within a structure. The substrates are coated with a calcium hydroxide layer, which interacts with ambient air to absorb CO2. Once carbonated, the coating is removed for sequestration or further use, and the substrates can be reused. Regeneration of the calcium sorbent is possible through calcination and slaking processes, enabling continuous cycles of carbon capture.