Activated carbon materials derived from liquefied bark-phenol formaldehyde resins for high performance supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 105540-105549 ◽  
Author(s):  
Changshui Wang ◽  
Tingzhi Liu
Keyword(s):  
Activated Carbon ◽  
Phenolic Compounds ◽  
High Performance ◽  
Carbon Materials ◽  
Activated Carbons ◽  
Phenol Formaldehyde

Bark phenolic compounds have been used to partially substitute petroleum-based phenol in a resin synthesis due to their similarity. Activated carbons derived from the liquefied bark-phenol formaldehyde resins exhibit excellent capacitance.

Use of activated carbon to remove undesirable residual amylase from refinery streams

2017 ◽  
pp. 96-103 ◽  
Author(s):  
Gillian Eggleston ◽  
Isabel Lima ◽  
Emmanuel Sarir ◽  
Jack Thompson ◽  
John Zatlokovicz ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
High Performance ◽  
Activated Carbons ◽  
Amylase Activity ◽  
Sugar Industry ◽  
End User ◽  
Customer Complaints ◽  
Carry Over ◽  
Very High

In recent years, there has been increased world-wide concern over residual (carry-over) activity of mostly high temperature (HT) and very high temperature (VHT) stable amylases in white, refined sugars from refineries to various food and end-user industries. HT and VHT stable amylases were developed for much larger markets than the sugar industry with harsher processing conditions. There is an urgent need in the sugar industry to be able to remove or inactivate residual, active amylases either in factory or refinery streams or both. A survey of refineries that used amylase and had activated carbon systems for decolorizing, revealed they did not have any customer complaints for residual amylase. The use of high performance activated carbons to remove residual amylase activity was investigated using a Phadebas® method created for the sugar industry to measure residual amylase in syrups. Ability to remove residual amylase protein was dependent on the surface area of the powdered activated carbons as well as mixing (retention) time. The activated carbon also had the additional benefit of removing color and insoluble starch.

scholarly journals All-solid-state high performance asymmetric supercapacitors based on novel MnS nanocrystal and activated carbon materials

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Teng Chen ◽  
Yongfu Tang ◽  
Yuqing Qiao ◽  
Zhangyu Liu ◽  
Wenfeng Guo ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Solid State ◽  
High Performance ◽  
Carbon Materials ◽  
Asymmetric Supercapacitors

Functionalized Carbonaceous Materials as Cathode for Lithium-Ion Batteries

MRS Advances ◽  
2016 ◽  
Vol 1 (45) ◽  
pp. 3037-3042 ◽  
Author(s):  
Hai Zhong ◽  
Chunhua Wang ◽  
Zhibin Xu ◽  
Fei Ding ◽  
Xingjiang Liu
Keyword(s):  
Activated Carbon ◽  
High Performance ◽  
Carbon Materials ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Carbon Particles ◽  
Ion Storage ◽  
Activated Carbon Particles ◽  
Storage Buffer ◽  
A Current

ABSTRACTActivated carbon materials are integrated into functionalization of graphene nano-sheets to serve as a high-power lithium cathode. The electrochemical performance shows that the composite displays the highest reversible capacity (c. 170 mAh g-1) comparing with functionalized graphene and activated carbon. Also, approximately 92% of its capacity can be retained after 4,000 cycles at a current of 1 A g-1. Moreover, the composite exhibits an excellent rate performance, a reversible capacity of 90 mAh g-1 even at 6 A g-1, which corresponds to the power density of 15.2 kW kg-1 and energy density of 227 Wh kg-1, respectively. The high performance of this composite can be attributed to the fact that the activated carbon particles not only reduce the graphene sheet stacking thus making it easier for ions to diffuse, but also act as an ion storage buffer against accelerating electron transfer.

Use of activated carbon to remove undesirable residual amylase from refinery streams

2017 ◽  
pp. 96-103
Author(s):  
Gillian Eggleston ◽  
Isabel Lima ◽  
Emmanuel Sarir ◽  
Jack Thompson ◽  
John Zatlokovicz ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
High Performance ◽  
Activated Carbons ◽  
Amylase Activity ◽  
Sugar Industry ◽  
End User ◽  
Customer Complaints ◽  
Carry Over ◽  
Very High

In recent years, there has been increased world-wide concern over residual (carry-over) activity of mostly high temperature (HT) and very high temperature (VHT) stable amylases in white, refined sugars from refineries to various food and end-user industries. HT and VHT stable amylases were developed for much larger markets than the sugar industry with harsher processing conditions. There is an urgent need in the sugar industry to be able to remove or inactivate residual, active amylases either in factory or refinery streams or both. A survey of refineries that used amylase and had activated carbon systems for decolorizing, revealed they did not have any customer complaints for residual amylase. The use of high performance activated carbons to remove residual amylase activity was investigated using a Phadebas® method created for the sugar industry to measure residual amylase in syrups. Ability to remove residual amylase protein was dependent on the surface area of the powdered activated carbons as well as mixing (retention) time. The activated carbon also had the additional benefit of removing color and insoluble starch.

Assessment of Different Binders for Activated Carbon Granulation for the Use in CO2 Adsorption

2021 ◽  
Vol 25 (1) ◽  
pp. 1086-1100
Author(s):  
Pauls Argalis ◽  
Ilze Jerane ◽  
Aivars Zhurinsh ◽  
Kristine Vegere
Keyword(s):  
Activated Carbon ◽  
Polyvinyl Acetate ◽  
Activated Carbons ◽  
Phenol Formaldehyde ◽  
Granular Activated Carbon ◽  
Phenol Formaldehyde Resin ◽  
Waste Materials ◽  
Carbon Adsorbents ◽  
Formaldehyde Resin ◽  
Gas Generator

Abstract An eco-friendly method for the synthesis of granular activated carbon was developed in this study. Two types of activated carbon and three types of activated carbon granules have been obtained using different binders, and their properties have been determined. The approach requires adding other binders and waste materials to improve the granulation of activated carbon. Activated carbon was prepared from birch wood chips. Prepared carbon was granulated with a) gas generator tar, b) phenol-formaldehyde resin, and c) polyvinyl acetate to obtain granular activated carbon. This work aims to study the possibilities of using activated carbon adsorbents for CO2 adsorption. The activated carbon produced was characterized by BET, FTIR, and SEM. The adsorption behavior on CO2 was also studied. Granular activated carbons compression strength was enough to study it in an adsorption bed, and an optimal binder was to be phenol-formaldehyde resin and polyvinyl acetate. The obtained results show that activated carbon granules are suitable for CO2 adsorption and can be used, for example, for the removal of CO2 in the biogas upgrading process. As the sustainability problems are increasing, granules from waste materials could be promising materials for further studies.

Activated carbon from nitrogen rich watermelon rind for high-performance supercapacitors

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59333-59342 ◽  
Author(s):  
Ru-Juan Mo ◽  
Yang Zhao ◽  
Min Wu ◽  
Hong-Mei Xiao ◽  
Shigenori Kuga ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Performance ◽  
Carbon Materials ◽  
Nitrogen Doped ◽  
Watermelon Rind ◽  
Biomass Materials ◽  
Nitrogen Doped Carbon ◽  
First Time

Nitrogen rich biomass materials was selected as precursor of nitrogen-doped carbon materials for supercapacitor for the first time.

Cotton-based porous activated carbon with a large specific surface area as an electrode material for high-performance supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (79) ◽  
pp. 64704-64710 ◽  
Author(s):  
Guofu Ma ◽  
Dongyang Guo ◽  
Kanjun Sun ◽  
Hui Peng ◽  
Qian Yang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Carbon Source ◽  
Electrode Material ◽  
High Performance ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Large Specific Surface Area ◽  
Simple Chemical ◽  
Activating Agent ◽  
Porous Activated Carbon

Cotton-based porous activated carbons (CACs) are prepared through a simple chemical activation method using cotton fiber as carbon source and ZnCl2 as activating agent.

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