scholarly journals Influence of activated carbon fibres with different specific surface areas on the thermal conductive and electrical insulating properties of polyamide‐imide composites

High Voltage ◽  
2017 ◽  
Vol 2 (3) ◽  
pp. 161-166 ◽  
Author(s):  
Fang Jiang ◽  
Li Chen ◽  
Na Song ◽  
Liyi Shi ◽  
Peng Ding
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Carbon Fibres ◽  
Surface Areas ◽  
Specific Surface Areas ◽  
Activated Carbon Fibres ◽  
Insulating Properties

scholarly journals Adsorption of Volatile Organic Compounds in Nitrogen Streams on Oxidized Activated Carbon Fibres

2001 ◽  
Vol 19 (5) ◽  
pp. 423-433 ◽  
Author(s):  
Feiyu Kang ◽  
Zheng-Hong Huang ◽  
Kai-Ming Liang ◽  
Jun-Bing Yang ◽  
Hui Wu
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Specific Surface ◽  
Organic Compounds ◽  
Gravimetric Method ◽  
Carbon Fibres ◽  
Surface Areas ◽  
Volatile Organic ◽  
Specific Surface Areas ◽  
Activated Carbon Fibres

Viscose rayon-based activated carbon fibres (ACFs) with low and high specific surface areas were treated with conc. HNO3, 30 wt% H2O2 and air at different temperatures. The pore textures and surface chemistries of the samples were characterized by nitrogen adsorption at 77 K and X-ray photoelectron spectroscopic (XPS) methods. The adsorption of traces of volatile organic compounds (VOCs), i.e. benzene and methyl ethyl ketone (MEK), in nitrogen streams on the samples wwa measured by a gravimetric method. The results showed that the surface oxygen complexes and pore textures of all the oxidized ACFs were modified and differed depending on whether oxidation had been conducted under gaseous or solution conditions. ACFs with different specific surface areas possessed different adsorption characteristics towards VOC vapours after subjection to oxidation treatment.

scholarly journals Adsorption of Reactive Blue 19 on coconut shell and bamboo activated carbons

2017 ◽  
Vol 33 (3) ◽  
Author(s):  
Chiều Lê Văn ◽  
Duy Ngọc Vũ ◽  
Tiến Mạnh Nguyễn ◽  
Hà Thế Cao
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Activated Carbons ◽  
Absorption Capacity ◽  
Coconut Shell ◽  
Reactive Blue 19 ◽  
Surface Areas ◽  
Site Density ◽  
Specific Surface Areas ◽  
Kinetics And Isotherms

Abstract: Kinetics and isotherms of Reactive Blue 19 adsorption on two kinds of granular activated carbons from coconut shell and bamboo were determined in this study. These activated carbon are micropore materials with specific surface areas of 687 and 425 m2/g, respectively. Experimental data shows that equilibrium times are the same for both kinds of activated carbon when ininital concentration of the dye is 40 mg/L. However, maximum absorption capacity of bamboo activated carbon is about 10 times higher than that of coconut shell. This results reveals that adsorption site density on the surface plays a more important role than specific surface area.           

scholarly journals Sisal xylem fibre-based activated carbon fibres for fuel adsorption: effect of thermal stabilization of diammonium phosphate

2020 ◽  
Vol 7 (9) ◽  
pp. 200966
Author(s):  
Zhuo Deng ◽  
Jian Hu ◽  
Hailong Li
Keyword(s):  
Activated Carbon ◽  
Specific Surface ◽  
Pore Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Thermal Stabilization ◽  
Carbon Fibres ◽  
Desorption Process ◽  
Activated Carbon Fibres ◽  
Fuel Evaporation

Activated carbon fibres (ACFs) are considered as the next generation of activated carbon products. However, lack of structural diversity in pore structure and high prices of raw materials for ACFs has restrained the development of ACF materials. In this paper, a sisal-based activated carbon fibre (SACF) material was prepared from sisal wastes with a unique thermal stabilization treatment to maintain fibrous shapes of SACFs while dispersing in solutions, and the SACFs were prepared as raw fibre materials for fuel evaporation emissions controlling products. Experimental results of N 2 adsorption showed that SACF has a typical I-type adsorption isotherm, with specific surface area of SACF samples of approximately 1200 m 2 g −1 , and mainly microporous pore structure. Compared with commercial samples (specific surface area, 1841.29 m 2 g −1 ), the butane working capacities of SACF for advanced fuel evaporation emissions controlling product was 0.4 g/100 ml higher. Furthermore, two dynamic models, Thomas model and Clark model, were applied to adsorption breakthrough data, which showed excellent fit. And it indicated from the adsorption breakthrough curves and parameters of both models that the SACF has better performance in fuel adsorption and desorption process than the commercial samples.

scholarly journals Adsorption Characteristics of Trace Volatile Organic Compounds on Activated Carbon Fibres at Room Temperature

2002 ◽  
Vol 20 (5) ◽  
pp. 495-500 ◽  
Author(s):  
Zheng-Hong Huang ◽  
Feiyu Kang ◽  
Yong-Ping Zheng ◽  
Jun-Bing Yang ◽  
Kai-Ming Liang
Keyword(s):  
Activated Carbon ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Carbon Fibres ◽  
Adsorption Characteristics ◽  
Surface Areas ◽  
Volatile Organic ◽  
Activated Carbon Fibres

The adsorption characteristics of volatile organic compounds (VOCs) on viscose rayon-based activated carbon fibres (ACFs) were investigated. ACFs with specific surface areas of 640 m2/g and 1460 m2/g were used to adsorb trace volatile organic compounds in nitrogen streams at atmospheric pressure at or near room temperature (25°C and 30°C). The experimental results showed that ACFs with different surface areas exhibited different dynamic adsorption behaviours at or near room temperature.

scholarly journals Effect of Hydrophilicity of Activated Carbon Electrodes on Desalination Performance in Membrane Capacitive Deionization

2019 ◽  
Vol 9 (23) ◽  
pp. 5055 ◽  
Author(s):  
Kyusik Jo ◽  
Youngbin Baek ◽  
Changha Lee ◽  
Jeyong Yoon
Keyword(s):  
Activated Carbon ◽  
Ion Exchange ◽  
Surface Chemistry ◽  
Specific Surface ◽  
Electrode Materials ◽  
Carbon Electrodes ◽  
Water Molecules ◽  
Capacitive Deionization ◽  
Surface Areas ◽  
Specific Surface Areas

Membrane capacitive deionization (MCDI) is a modification of capacitive deionization (CDI) using ion-exchange membranes (IEM) in front of the electrodes. Electrode properties, especially the specific surface area, are known to be strongly related with desalination performance in CDI, but the effects of other properties in MCDI are not fully understood. The objective of this study was to investigate the effect of hydrophilicity in activated carbon electrodes on desalination performance in MCDI. Two types of activated carbon (P60 and YS-2) whose specific surface areas were similar were used as electrode materials, but they had different hydrophilicity (i.e., P60 was originally hydrophobic and YS-2 was relatively hydrophilic due to its nitrogen-containing surface chemistry). These hydrophilic electrodes (either the electrode itself or modified with polydopamine (PDA)) led to an increase in the salt adsorption capacity (SAC) in MCDI because they facilitated the access of both ions and water molecules into the electrode pores. In particular, the SAC of the P60 electrode displayed a large increase to almost reach that of the YS-2 electrode due to the improved hydrophilicity with PDA modification and the insignificant effects of PDA modification on an already hydrophilic YS-2 electrode. Additionally, PDA-modified IEM in MCDI reduced the SAC as a result of the additional insulating PDA layer with little changes in hydrophilicity.

N-Doped ordered mesoporous carbon grafted onto activated carbon fibre composites with enhanced activity for the electro-Fenton degradation of Brilliant Red X3B dye

RSC Advances ◽  
2014 ◽  
Vol 4 (104) ◽  
pp. 60168-60175 ◽  
Author(s):  
Qiaoli Peng ◽  
Zehui Zhang ◽  
Ze'ai Huang ◽  
Wei Ren ◽  
Jie Sun
Keyword(s):  
Activated Carbon ◽  
Mesoporous Carbon ◽  
Ordered Mesoporous Carbon ◽  
Carbon Composites ◽  
Carbon Fibres ◽  
Ordered Mesoporous ◽  
Fibre Composites ◽  
Activated Carbon Fibres ◽  
Carbon Fibre Composites ◽  
Activated Carbon Fibre

N-Doped ordered mesoporous carbon (N-OMC) was successfully prepared using dicyandiamide (C2H4N4) as the nitrogen source and was grafted onto activated carbon fibres (ACFs) to form carbon composites (ACF@N-OMC).

scholarly journals Ultrafine porous boron nitride nanofibers synthesized via a freeze-drying and pyrolysis process and their adsorption properties

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1253-1259 ◽  
Author(s):  
Jing Lin ◽  
Lulu Xu ◽  
Yang Huang ◽  
Jie Li ◽  
Weijia Wang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Specific Surface ◽  
Freeze Drying ◽  
Adsorption Properties ◽  
Pyrolysis Process ◽  
Surface Areas ◽  
Aspect Ratios ◽  
Large Pore ◽  
Specific Surface Areas

Ultrafine porous boron nitride nanofibers with high aspect ratios, high specific surface areas and large pore volumes has been synthesized in large quantity via a freeze-drying and post pyrolysis process.

scholarly journals Experimental Investigation of Coal Dust Wettability Based on Surface Contact Angle

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Gang Zhou ◽  
Han Qiu ◽  
Qi Zhang ◽  
Mao Xu ◽  
Jiayuan Wang ◽  
...  
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Specific Surface ◽  
Coal Dust ◽  
Single Point ◽  
Contact Angles ◽  
Critical Surface ◽  
Volume Percentage ◽  
Surface Areas ◽  
Specific Surface Areas

Wettability is one of the key chemical properties of coal dust, which is very important to dedusting. In this paper, the theory of liquid wetting solid was presented firstly; then, taking the gas coal of Xinglongzhuang coal mine in China as an example, by determination of critical surface tension of coal piece, it can be concluded that only when the surface tension of surfactant solution is less than 45 mN/m can the coal sample be fully wetted. Due to the effect of particle dispersity, compared with the contact angle of milled coal particle, not all the contact angles of screened coal powder with different sizes have a tendency to increase. Furthermore, by the experiments of coal samples’ specific surface areas and porosities, it can be achieved that the volume of single-point total pore decreases with the gradual decreasing of coal’s porosity, while the ultramicropores’ dispersities and multipoint BET specific surface areas increase. Besides, by a series of contact angle experiments with different surfactants, it can be found that with the increasing of porosity and the decreasing of volume percentage of ultramicropore, the contact angle tends to reduce gradually and the coal dust is much easier to get wetted.

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