Lee Byeong-Hoon, Lee Hye-Min, Chung Dong Chul, Kim Byung-Joo
Research Center for Environmental Materials, Korea Institute of Carbon Convergence Technology, Jeonju 54853, Korea.
Department of Organic Materials & Fiber Engineering, Jeonbuk National University, Jeonju 54896, Korea.
Nanomaterials (Basel). 2021 Mar 9;11(3):673. doi: 10.3390/nano11030673.
Kenaf-derived activated carbons (AKC) were prepared by HPO activation for automobile canisters. The microstructural properties of AKC were observed using Raman spectra and X-ray diffraction. The textural properties were studied using N/77 K adsorption isotherms. Butane working capacity was determined according to the ASTM D5228. From the results, the specific surface area and total pore volume of the AKC was determined to be 1260-1810 m/g and 0.68-2.77 cm/g, respectively. As the activation time increased, the butane activity and retentivity of the AKC increased, and were observed to be from 32.34 to 58.81% and from 3.55 to 10.12%, respectively. The mesopore ratio of activated carbon increased with increasing activation time and was observed up to 78% at 973 K. This indicates that butane activity and retentivity could be a function not only of the specific surface area or total pore volume, but also of the mesopore volume fraction in the range of 2.8-3.8 nm and 5.5-6.5 nm of adsorbents, respectively. The AKC exhibit enhanced butane working capacity compared to commercial activated carbon with the high performance of butane working capacity due to its pore structure having a high mesopore ratio.
采用磷酸活化法制备了用于汽车滤罐的红麻基活性炭（AKC）。利用拉曼光谱和X射线衍射观察了AKC的微观结构特性。采用N/77 K吸附等温线研究了其织构特性。丁烷工作容量根据ASTM D5228测定。结果表明，AKC的比表面积和总孔容分别为1260 - 1810 m²/g和0.68 - 2.77 cm³/g。随着活化时间的增加，AKC的丁烷活性和保留率增加，分别为32.34%至58.81%和3.55%至10.12%。活性炭的中孔率随活化时间的增加而增加，在973 K时可达78%。这表明丁烷活性和保留率不仅可能是比表面积或总孔容的函数，而且分别是吸附剂在2.8 - 3.8 nm和5.5 - 6.5 nm范围内中孔体积分数的函数。与商业活性炭相比，AKC具有更高的丁烷工作容量，因其孔结构具有较高的中孔率，丁烷工作性能优异。
