Preparation of porous carbons from petroleum coke by different activation methods

Wu, Mingbo; Zha, Qingfang; Qiu, Jieshan; Han, Xia; Yao, Guowei; Li, Zhaofeng; Yuan, Aijun; Sun, Xin

doi:10.1016/j.fuel.2005.03.008

Cited by 83 publications

(33 citation statements)

References 12 publications

(14 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, potassium acts as a catalyst that increases the rate of reaction between water molecules and carbon atoms (Wu et al 2005). Therefore, the use of humidified nitrogen resulted in higher iodine numbers than the use of dry nitrogen.…”

Section: Effect Of Humiditymentioning

confidence: 99%

Preparation of Pinewood- and Wheat Straw-based Activated Carbon via a Microwave-assisted Potassium Hydroxide Treatment and an Analysis of the Effects of the Microwave Activation Conditions

Mao¹,

Zhou²,

Hashisho³

et al. 2014

BioResources

View full text Add to dashboard Cite

This study explored the effect of activated carbon preparation conditions on their adsorption performance. Pinewood and wheat straw were used as source materials to prepare activated carbon via a fast activation process using KOH and microwave heating. The iodine numbers and carbon yields were determined to evaluate the adsorption properties of the activated carbon. The effects of various KOH/char mass ratios, particle sizes, humidity levels, and microwave heating times on the physical characteristics of the activated carbon were investigated. The iodine number and yield and SEM images were used to characterize the activated carbon. Small particle sizes, the presence of humidity in the purge gas, and high KOH/char ratios resulted in higher iodine numbers. The best activated carbons were obtained using a KOH/char ratio of 3.0, a microwave power of 600 W, a radiation time of 30 min, and a particle size of 0.1 to 0.42 mm in a humid environment; these carbons showed iodine numbers of 2208 mg/g (pinewood activated carbon) and 1420 mg/g (wheat straw activated carbon), with carbon yields of 73% and 52%, respectively. Longer microwave heating times increased the iodine number. The iodine numbers and yields of the pinewood activated carbons were much higher than those of their wheat straw counterparts.

show abstract

Section: Effect Of Humiditymentioning

confidence: 99%

Preparation of Pinewood- and Wheat Straw-based Activated Carbon via a Microwave-assisted Potassium Hydroxide Treatment and an Analysis of the Effects of the Microwave Activation Conditions

Mao¹,

Zhou²,

Hashisho³

et al. 2014

BioResources

View full text Add to dashboard Cite

show abstract

“…wood 10 , fruit shells 11 ) and some fossil-fuel based precursors including petroleum 12 and coal. wood 10 , fruit shells 11 ) and some fossil-fuel based precursors including petroleum 12 and coal.…”

Section: Introductionmentioning

confidence: 99%

Enteromorpha based porous carbons activated by zinc chloride for supercapacitors with high capacity retention

et al. 2015

RSC Adv.

Self Cite

View full text Add to dashboard Cite

Graphical AbstractPorous carbons were prepared from enteromorpha overrunning in China Sea with ZnCl 2 as active reagent. The prepared porous carbon with a specific surface area of 1651 m 2 /g exhibited a specific capacitance of 206 F/g and capacity retention of 93% even after 5000 cycles, indicating good electrochemical properties and promising utilization future of enteromorpha as electrode materials for supercapacitors.Porous carbons were prepared from enteromorpha overrunning in China Sea with ZnCl 2 as active agent. The obtained porous carbons were used as electrode materials to make supercapacitors. In order to make enteromorpha based supercapacitors with high performance, the effects of preparation parameters including impregnation weight ratio of ZnCl 2 to enteromorpha, activation time and temperature on pore structure and electrochemical performances of enteromorpha based porous carbons (EBPCs) were investigated. The specific area and porous structure were characterized by nitrogen adsorption. Galvanostatic charge-discharge and cyclic voltammetry analysis were used to investigate the electrochemical properties of EBPCs. The results show that activation temperature of 700 °C, the impregnation weight ratio of 2/1 and activation time of 1.5 h are the optimal preparation parameters. The prepared EBPC with a specific surface area of 1651 m 2 /g exhibited a specific capacitance of 206 F/g and capacity retention of 93 % even after 5000 cycles, showing excellent electrochemical properties of EBPC and good utilization future of enteromorpha. the pseudocapacitance contribution is little, and specific capacitance derives mainly from electric double layer capacitance 34 . In addition, the CV curve of H700-0-1.5 has a larger area than those of H800-0-1.5 and H600-0-1.5, indicating the highest specific capacitance, which can also be confirmed by galvanostatic charge-discharge curves in Fig. 7(a).

show abstract

“…The traditional production of activated carbon consists of two steps, carbonization and activation. The properties of the final product depend on the nature of raw material used and the activating agent [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Tar Deposits, Extraction and Sorption Properties

Pryszcz¹,

Grycová²,

Koutník³

et al. 2016

GeoScience Engineering

View full text Add to dashboard Cite

The main goal of this paper was to characterize and find a useful solution for the decomposition of tar deposits. For the experimental part, tar deposits, formed by polymerization and condensation reactions, were chosen from a storage tank for tars. At first the initial analyses of tar deposits (elemental, thermogravimetric, and calorimetric analyses) were performed. After the characterization, the tar deposits were extracted in the Soxhlet extractor by acetone, toluene, and quinolone and activated with potassium hydroxide. As the final step of this work, the sorption characterization on the 3Flex Surface Characterization Analyzer (Micromeritics) was performed. The specific surface area of the samples was evaluated using two methods -a single point measurement at p/p0=0.2 and BET method. Micropore and external surface areas were calculated based on a tplot analysis (carbon black model).

show abstract

Preparation of porous carbons from petroleum coke by different activation methods

Cited by 83 publications

References 12 publications

Preparation of Pinewood- and Wheat Straw-based Activated Carbon via a Microwave-assisted Potassium Hydroxide Treatment and an Analysis of the Effects of the Microwave Activation Conditions

Preparation of Pinewood- and Wheat Straw-based Activated Carbon via a Microwave-assisted Potassium Hydroxide Treatment and an Analysis of the Effects of the Microwave Activation Conditions

Enteromorpha based porous carbons activated by zinc chloride for supercapacitors with high capacity retention

Characterization of Tar Deposits, Extraction and Sorption Properties

Contact Info

Product

Resources

About