Micropore-structured activated carbon prepared by waste PET/petroleum-based pitch

Seo, Sang Wan; Choi, Yong; Kim, Ji Hong; Cho, Jong Hoon; Lee, Young-Seak; Im, Ji Sun

doi:10.1007/s42823-019-00028-w

Cited by 22 publications

(9 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, the specific surface area of PPAC was higher than that of PAC due to adding PET. The changes in the pitch property and specific surface area of activated carbon according to the addition of PET were reported in previous studies [33]. In short, adding PET when synthesizing the pitch using PFO dramatically increases the thermal stability of the pitch.…”

Section: Effect Of Specific Surface Area and Porosity Of Ac On Edlc C...supporting

confidence: 69%

“…As a result, the specific surface area and pore volume of AC based on PFO and PET (PPAC) were improved in comparison with those of PFO-based AC (PAC) [26]. It is known that the capacitance is strongly affected by the specific surface area and pore characteristics of AC [33]. In other words, the addition of PET has a significant influence on capacitance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Correlation of EDLC Capacitance with Physical Properties of Polyethylene Terephthalate Added Pitch-Based Activated Carbon

2022

View full text Add to dashboard Cite

The electric double-layer capacitor (EDLC) has attracted attention by using activated carbon (AC) as an active electrode material with a high power density and high cost-efficiency in industrial applications. The EDLC has been actively developed over the past decade to improve the power density and capacitance. Extensive studies on EDLCs have been conducted to investigate the relation of EDLC capacitance to the physical properties of AC, such as the specific surface area, pore type and size, and electrical conductivity. In this study, EDLC was fabricated with AC, and its capacitance was evaluated with the physical properties of AC. The AC was prepared using petroleum-based pitch synthesized using pyrolysis fuel oil (PFO) with polyethylene terephthalate (PET). The AC based on PFO and PET (PPAC) exhibited high specific surface area and low micropore fraction compared to the PFO-based AC without PET addition (PAC). Furthermore, the reduction of the EDLC capacitance of PPAC was smaller than that of PAC, as the scan rate was increased from 5 to 100 mV s−1. It was determined that the minor reduction of capacitance with an increase in the scan rate resulted from the development of 4 nm-sized mesopores in PPAC. In addition, a comprehensive correlation of EDLC capacitance with various physical properties of ACs, such as specific surface area, pore characteristics, and electrical conductivity, was established. Finally, the optimal properties of AC were thereupon derived to improve the EDLC capacitance.

show abstract

Section: Effect Of Specific Surface Area and Porosity Of Ac On Edlc C...supporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Correlation of EDLC Capacitance with Physical Properties of Polyethylene Terephthalate Added Pitch-Based Activated Carbon

2022

View full text Add to dashboard Cite

show abstract

“…Alkali and alkaline earth metals, and some acids, are normally used as activating agents. Examples include potassium hydroxide (KOH) (Fu et al 2019;Seo et al 2019;Yang et al 2019), phosphoric acid (H 3 PO 4 ) (Kang et al 2018;Wu et al 2018;Baek et al 2019), potassium carbonate (K 2 CO 3 ) (Zhou et al 2012;Garba et al 2015;Oliveira et al 2018), zinc chloride (ZnCl 2 ) (Vunain et al 2018;Laverde et al 2019;Ma et al 2019) and sodium hydroxide (NaOH) (Laverde et al 2019;Hasanzadeh et al 2020;Zhang et al 2020).…”

Section: Strategies In Chemical Activationmentioning

confidence: 99%

“…These have specific surfaces in the range of 285 to 3,230 m 2 /g. Using operating conditions comprising ratio 1.5, 800°C and 1 hour yields an AC with 285 m 2 /g specific surface (Yang et al 2019), while 3,230 m 2 /g is achieved with ratio 4, 800°C and 1 hour (Seo et al 2019). Further comparison has been made because both precursors have carbon content .50% (Seo et al 2019;Yang et al 2019).…”

Section: Relationships Between Activation Strategies and Physical Properties Of Acsmentioning

confidence: 99%

“…Above some upper threshold, however, the precursor's structural stability is inadequate and the pores tend to collapse. Similarly, increasing the chemical ratio produces a positive trend in mesoporosity and pore size (Singh et al 2017;Seo et al 2019;. Use of large amounts of KOH damages the carbon walls, yielding a continuous pore structure, and increases the pore size and volume, as well as the specific surface, by oxidation and gasification at high temperature.…”

Section: Relationships Between Activation Strategies and Physical Properties Of Acsmentioning

confidence: 99%

See 1 more Smart Citation

Effects of chemical activating agents on physical properties of activated carbons – a commentary

Amran

Zaini

2020

Water Practice and Technology

View full text Add to dashboard Cite

Well-developed surface areas and porous structures that render high adsorption capacity are necessary for pollutant removal from wastewater by activated carbons. Activated carbons from natural resources, and agricultural and industrial waste materials are produced using chemical agents, including KOH, H3PO4, K2CO3, ZnCl2 and NaOH. This study is intended to highlight the effects of those agents on the physical properties of the activated carbons. The operating conditions, i.e., temperature, time and ratio show an interplay towards the physical properties at varying degree. The yield, pore size, mesoporosity and surface area of activated carbons derived using different chemical agents correlate well with the impregnation ratio. Generally, the pore size, mesoporosity and surface area increase, while the yield decreases with increasing ratio (over a given range). Higher ratio and temperature are recommended for KOH, K2CO3 and NaOH activation, to endow activated carbons with greater surface area.

show abstract

Impact of Pore Structure on Two‐Electron Oxygen Reduction Reaction in Nitrogen‐Doped Carbon Materials: Rotating Ring‐Disk Electrode vs. Flow Cell

Wang

et al. 2022

ChemSusChem

View full text Add to dashboard Cite

The impact of pore structure on the two‐electron oxygen reduction reaction (ORR) in nitrogen‐doped carbon materials is currently under debate, and previous studies are mainly limited to the rotating ring‐disk electrode (RRDE) rather than the practical flow cell (FC) system. In this study, assisted by a group of reliable pore models, the impact of two pore structure parameters, that is, Brunauer–Emmett–Teller surface area (SBET) and micropore surface fraction (fmicro), on ORR activity and selectivity are investigated in both RRDE and FC. The ORR mass activity correlates positively to the SBET in the RRDE and FC because a higher SBET can host more active sites. The H2O2 selectivity is independent of fmicro in the RRDE but correlates negatively to fmicro in the FC. The inconsistency results from different states of the electrode in the RRDE and the FC. These insights will guide the design of carbon materials for H2O2 synthesis.

show abstract

Micropore-structured activated carbon prepared by waste PET/petroleum-based pitch

Cited by 22 publications

References 20 publications

Correlation of EDLC Capacitance with Physical Properties of Polyethylene Terephthalate Added Pitch-Based Activated Carbon

Correlation of EDLC Capacitance with Physical Properties of Polyethylene Terephthalate Added Pitch-Based Activated Carbon

Effects of chemical activating agents on physical properties of activated carbons – a commentary

Impact of Pore Structure on Two‐Electron Oxygen Reduction Reaction in Nitrogen‐Doped Carbon Materials: Rotating Ring‐Disk Electrode vs. Flow Cell

Contact Info

Product

Resources

About