Preparation of activated petroleum coke for supercapacitor application

Priyadharshini, R.; Saravanathamizhan, R.; Manimozhi, Veerasamy; Janakiraman, Manokaran; Balasubramanian, N.

doi:10.1002/est2.151

Cited by 10 publications

(1 citation statement)

References 30 publications

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“…Based on the sulfur content, petroleum coke is categorized into high-sulfur coke (S > 3.0 wt.%), medium-sulfur coke (0.5 < S < 3.0 wt.%), and low-sulfur coke (S < 0.5 wt.%) [ 3 ]. Low-sulfur coke is used for the preparation of graphite electrodes [ 4 ], carburizing agents, reserve carbon [ 5 ], and some special materials [ 6 , 7 , 8 ]. Medium-sulfur coke is applied to the production of prebaking anode aluminum electrolysis, while high-sulfur coke is limited to fuel combustion in chemical plants [ 9 , 10 , 11 ], cement [ 12 ], and composite materials [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Deep Desulfurization of High-Sulfur Petroleum Coke via Alkali Catalytic Roasting Combined with Ultrasonic Oxidation

Luo,

Chen,

Chen

et al. 2024

Materials

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The sulfur in petroleum coke is harmful to carbon products, underscoring the importance of desulfurization for high-sulfur petroleum coke. This paper proposes a method combining alkaline catalytic roasting with ultrasonic oxidation for the deep desulfurization of high-sulfur petroleum coke. The results show that the desulfurization rate reaches 88.99% and the sulfur content is reduced to 0.83 wt.% under a coke particle size of 96–75 μm, sodium-hydroxide-to-petroleum-coke ratio of 50%, roasting temperature of 700 °C, and holding time of 2 h. The alkali-calcined petroleum coke is ultrasonically oxidized and desulfurized in peracetic acid. The results show that, under a hydrogen peroxide content of 10%, hydrogen-peroxide-(liquid)-to-petroleum-coke (solid) ratio of 20 mL/g, acetic acid content of 5 mL, ultrasonic power of 300 W, reaction temperature of 60 °C, and reaction duration of 4 h, the sulfur content is reduced to 0.15 wt.% and the total desulfurization reaches 98.01%. Through a series of characterizations, the proposed desulfurization mechanism is verified. Alkali roasting effectively removes a significant portion of sulfur in petroleum coke. However, the elimination of certain sulfur compounds, such as the more complex thiophene, presents challenges. The thiophene content is subsequently removed via ultrasonic oxidation.

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Section: Introductionmentioning

confidence: 99%

Deep Desulfurization of High-Sulfur Petroleum Coke via Alkali Catalytic Roasting Combined with Ultrasonic Oxidation

Luo,

Chen,

Chen

et al. 2024

Materials

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Covalent Organic Framework Derived Oxygen/Sulfur‐Doped Porous Carbon for Robust High‐Capacitance Symmetric Supercapacitors

Wang,

Zhao,

Xing

et al. 2024

Chemistry An Asian Journal

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Heteroatom‐doped porous carbons (HPCs) have been considered promising electrode materials for supercapacitors due to their improvement of energy density by providing extra pseudocapacity. Covalent organic frameworks (COFs) are obtaining great importance in energy storage because of their designable structure and versatile functionality. Herein, we designed and fabricated oxygen and sulfur dual‐doped covalent organic framework (COF) derived HPCs with very high heteroatoms content (up to 25.76 atom%) via a facile coupling reaction. The optimized HPCs exhibit a porous structure with high specific surface area (up to 2835 m2 g‐1) along with a high specific capacitance (430 F g‐1 at 0.5 A g‐1), excellent capacitance retention (96.9%), and high coulombic efficiency (98.5%) after 10000 cycles at 5 A g‐1. As electrodes for aqueous symmetric supercapacitors, the HPCs exhibits a high energy density of 60 Wh kg‐1 at a 250 W kg‐1 power density, excellent cycling stability of capacity retention (82.2%) and a high coulombic efficiency (92.3%) after 10000 cycles at 10 A g‐1, indicating attractive application potential in chemical energy storage. This work establishes a promising strategy for preparation of high heteroatom content HPCs using COFs and demonstrates great potential for energy storage/conversion devices.

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Supercapacitive Swing Adsorption of Carbon Dioxide: Current Status and Perspectives

Wang,

Zhang,

Feng

et al. 2023

Batteries & Supercaps

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Supercapacitive swing adsorption (SSA) is a newly discovered electrochemically driven carbon dioxide capture method using the principle of electric double‐layer capacitor, which achieves the purpose of adsorption and desorption of CO2 by charging and discharging the supercapacitive electrodes. Based on this method, gas separation devices were designed which could adsorb CO2 from a mixture of carbon dioxide and nitrogen, and a series of factors affecting the CO2 adsorption capacity were explored. This review briefly introduces the SSA mechanism and the structural design of SSA modules, and analyzes the factors influencing the performance of SSA from multiple aspects, with emphasis on electrode materials, in order to find ways to improve the CO2 adsorption capacity of SSA modules.

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Preparation of activated petroleum coke for supercapacitor application

Cited by 10 publications

References 30 publications

Deep Desulfurization of High-Sulfur Petroleum Coke via Alkali Catalytic Roasting Combined with Ultrasonic Oxidation

Deep Desulfurization of High-Sulfur Petroleum Coke via Alkali Catalytic Roasting Combined with Ultrasonic Oxidation

Covalent Organic Framework Derived Oxygen/Sulfur‐Doped Porous Carbon for Robust High‐Capacitance Symmetric Supercapacitors

Supercapacitive Swing Adsorption of Carbon Dioxide: Current Status and Perspectives

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