Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Abstract

Under favorable regeneration conditions (120 °C, 100% CO 2 ), ultrafast adsorption kinetics and excellent long-term cycle stability are still the biggest obstacles for amine-based solid CO 2 adsorbents. Inspired by natural wood, a biochar with a highly ordered pore structure and excellent thermal conductivity was prepared and used as a carrier of organic amines to prepare ideal CO 2 adsorbents. The results showed that the prepared adsorbent has a very high adsorption working capacity (4.23 mmol CO 2 •g −1 ), and its performance remains stable even after 30 adsorption−desorption cycles in the harsh desorption environment (120 °C, 100% CO 2 ). Due to the existence of the hierarchical structure, the adsorbent exhibited ultra-fast adsorption kinetics, and the reaction rate constant is 37 times higher than that of traditional silica. This adsorbent also showed a very low regeneration heat of 1.64 MJ•kg −1 (CO 2 ), which is especially important for the practical application. Therefore, these biochar-based adsorbents derived from natural wood make the CO 2 capture process promising.

Research on the Preparation of Biochar from Waste and Its Application in Environmental Remediation

“…In other studies, however, very different conclusions were reached, with no significant effect of biochar on cumulative soil CO 2 emissions in the laboratory or in field-scale experiments [142]. Other studies also used biochar to form an organic carrier to prepare a good CO 2 adsorbent with an adsorption capacity of 4.23 mmol CO 2 g −1 and its performance remained stable after 30 cycles of adsorption experiments [143]. These reports show that a large number of experiments and pilot-scale studies are still needed to investigate and discuss the mechanisms of carbon sequestration in detail.…”

Application-Driven High-Thermal-Conductivity Polymer Nanocomposites

“…Thus, thermal management is a priority when designing advanced equipment and devices for energy harvesting, conversion, storage, regulation and utilization . Moreover, the heat transfer issue has also received considerable attention in the fields of biomedical engineering and environmental protection. , The key to solving these problems is to enhance the TC of materials. Polymer materials are indispensable in the manufacturing of modern equipment and advanced electronics owing to their excellent electrical insulation and ease of processing.…”