Preparation of high specific surface area activated carbon fiber by high-temperature vacuum activation and its superior water vapor adsorption for air humidity control
Source abstract
Abstract
Activated carbon fiber (ACF) with a high specific surface area has a good application prospect in atmospheric humidity control because it can adsorb H2O gas through both physical and chemical mechanisms. Based on a commercial ACF, the preparation of activated carbon fiber with a high specific surface area was carried out via a vacuum activation method. And the effects of adsorption temperature, relative humidity, and multi-components of air on water vapor adsorption of ACFs were studied. The results showed that the pore structure of ACF was improved. The maximum value of the specific surface area for ACF was 2967 m2/g, when the activation temperature and time were 1000 °C and 5 h, respectively, which was 71.03% higher than that of the commercial ACF (1733 m2/g). The water vapor adsorption capacity of ACF activated at 1050 °C for 2 h was a maximum of 1.36 g/g at 25 °C, which was 112.50% higher than that of the commercial ACF (0.64 g/g). On the other hand, the ideal selectivity of ACF toward H2O/N2 and H2O/O2 reached more than 4000. Furthermore, the isosteric enthalpy of adsorption on ACF was about 40 kJ/mol, indicating that the adsorption belonged to physical adsorption. It naturally follows that activated carbon fiber by high-temperature vacuum activation will be one of the alternatives for air humidity control.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Adsorption and Cooling Systems · Carbon Dioxide Capture Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (52)
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