Effect of Wood Species on the Pore Volume and Surface Area of Activated Carbon Derived from the Self Activation Process

IF 0.8 4区 工程技术 Q3 FORESTRY
L. Smith, S. Shi, Jiang-tao Shi, Cuicui Wang, Yulin Tan, Zhou Haiying
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引用次数: 5

Abstract

In this study, the effect of wood species on pore structure of activated carbon (AC) generated from a self-activation process at different dwelling times was investigated. Ten hardwood species were selected (afromosia, alder, black cherry, makore, pomelle sapele, soft maple, teak, walnut, white oak and yellow poplar) were activated at 1050 O C for three dwelling times (10 h, 5 h, and 2.5 h). X-ray diffraction, Raman spectroscopy, and elemental analysis were performed on AC to analyze the carbon structure. The Brunauer-Emmett-Teller (BET) surface area, Barrett-Joyner-Halenda (BJH) pore volume, and BJH pore width of AC samples were determined. It was shown from the study that the mesopore width of AC decreased as micropores were transitioned to mesopores, leading to an increase in the pore volume and surface area. The density and porosity of the samples that underwent 2.5-h dwelling time were determined. The porosity of the wood and their resultant AC were compared. The porosity between the wood and its AC possessed a relationship when true bulk densities of the wood and carbon were compared. The porosity of wood had an impact on the bulk density of the carbon but not on the true density. No relationship was observed between the porosity and surface area of the carbon samples.
木材种类对自活化活性炭孔体积和表面积的影响
在本研究中,研究了不同树种对活性炭(AC)自活化过程中不同停留时间孔隙结构的影响。选取10种硬木(黑木、桤木、黑樱桃、木核、柚木、软枫、柚木、胡桃木、白栎和黄杨),在1050℃下活化10 h、5 h和2.5 h,对活性炭进行x射线衍射、拉曼光谱和元素分析,分析其碳结构。测定了AC样品的brunauer - emmet - teller (BET)表面积、Barrett-Joyner-Halenda (BJH)孔径和BJH孔径。研究表明,随着微孔向中孔过渡,活性炭的介孔宽度减小,导致孔隙体积和比表面积增大。测定2.5 h后样品的密度和孔隙率。比较了木材的孔隙率及其产生的AC。当比较木材和碳的真实体积密度时,木材及其AC之间的孔隙率具有一定的关系。木材的孔隙率对碳的体积密度有影响,但对真密度没有影响。孔隙率与碳样品的表面积之间没有关系。
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来源期刊
Wood and Fiber Science
Wood and Fiber Science 工程技术-材料科学:纺织
CiteScore
7.50
自引率
0.00%
发文量
23
审稿时长
>12 weeks
期刊介绍: W&FS SCIENTIFIC ARTICLES INCLUDE THESE TOPIC AREAS: -Wood and Lignocellulosic Materials- Biomaterials- Timber Structures and Engineering- Biology- Nano-technology- Natural Fiber Composites- Timber Treatment and Harvesting- Botany- Mycology- Adhesives and Bioresins- Business Management and Marketing- Operations Research. SWST members have access to all full-text electronic versions of current and past Wood and Fiber Science issues.
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