CO2 capture by kaolinite and its adsorption mechanism
Source abstract
Abstract
Abstract The low-cost and naturally abundant clay mineral kaolinite was studied for use an adsorbent for CO 2 capture. Samples of kaolinite were subjected to acid treatments to improve their textural properties, namely, its surface area and pore volume. It was found that the kaolinite sample treated with 3 M H 2 SO 4 for 10 h reaction exhibited the highest Brunauer–Emmett–Teller (BET) surface area (18.9–74.3 m 2 /g) and pore volume (0.11–0.31 cm 3 /g). The CO 2 adsorption capacity of kaolinite, which was ~ 0 mg-CO 2 /g-sorbent at 25 °C, increased to 3.4 mg-CO 2 /g-sorbent after the acid treatment. Moreover, it was found that the CO 2 adsorption capacity of kaolinite was greater at room temperature than at higher temperatures. The CO 2 adsorption by kaolinite, which was investigated using X-ray diffraction analysis, Fourier transform infrared spectroscopy, and CO 2 adsorption isotherm measurements, was found to be mainly attributable to physical adsorption.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Carbon Dioxide Capture Technologies · Chemical Looping and Thermochemical Processes · CO2 Sequestration and Geologic Interactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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