Preparation and characterization of formed activated carbon from fine blue-coke

Abstract

Summary Formed activated carbon was prepared by extruding of a mixture of fine blue‐coke and organic additives and subsequent carbonization and steam activation. The conditions for preparation of activated carbon were optimized with orthogonal experiments taking carbonization temperature, activation temperature, activation time and water vapor flow as influential factors, and iodine number, compressive strength and yield as indexes. The results show that the iodine number is 1157.4 mg/g, the compressive strength is 9.9 MPa and yield is 34.15%, when the activated carbon produced at the optimum conditions of 450 °C carbonization temperature, 900 °C activation temperature, 90 min activation time and water vapor flow of 50 mL/h. Meanwhile, the nitrogen adsorption isotherm and morphology are analyzed, finding the activated carbon with developed mesopores. The function groups, mainly hydroxyl and carbonyl group on activated carbon, are found by Fourier transform infrared spectroscopy. The microcrystalline structure and the degree of graphitization of the formed activated carbon are smaller than fine blue‐coke by X‐ray diffraction analysis. Copyright © 2015 John Wiley & Sons, Ltd.

Nitrogen‐doping activated biomass carbon from tea seed shell for CO 2 capture and supercapacitor

“…1 Much attention has been paid on conversion of biomass into bio-oil, bio-char, and fuel gases by thermal-chemical methods. [10][11][12] Biomass is an ideal feedstock to prepare high specific surface area activated carbon. 4 It is an ideal carbon material that has great application in many fields.…”

“…8,9 Furthermore, activated carbon can be prepared from various feedstocks, including coal, blue-coke, and organic materials. [10][11][12] Biomass is an ideal feedstock to prepare high specific surface area activated carbon. Previous studies highlighted one-step and two-step methods to prepare activated carbon.…”

Rapid synthesis of chitin‐based porous carbons with high yield, high nitrogen retention, and low cost for high‐rate supercapacitors

“…57,58 Furthermore, the redox reactions of CuCl 2 into Cu to achieve well-developed porous structure required approximately 600°C, which is much lower than other porogens (eg, 800°C for KOH, 23 1200°C for ZnO, 33 and 1000°C for CO 2 59 ). Additionally, by using CuCl 2 2H 2 O as the good microwave absorber, this synthesis can render a rapid heating rate up to 126°C min −1 , resulting in a much shorter production duration of only 10 minutes compared with a few hours using the conventional contact heating.…”

“…Additionally, by using CuCl 2 2H 2 O as the good microwave absorber, this synthesis can render a rapid heating rate up to 126°C min −1 , resulting in a much shorter production duration of only 10 minutes compared with a few hours using the conventional contact heating. 57,58 Furthermore, the redox reactions of CuCl 2 into Cu to achieve well-developed porous structure required approximately 600°C, which is much lower than other porogens (eg, 800°C for KOH, 23 1200°C for ZnO, 33 and 1000°C for CO 2 59 ). The PC-Cu-based electrode gained a capacitance retention up to 84.8% at 10 A g −1 , even remaining 67.7% at an ultra-high current density of 50 A g −1 .…”

The effect of activation temperature on structure and properties of blue coke-based activated carbon by CO2 activation

“…In these areas, blue coke plays an important role in the coal chemical industry, because of its high fixedcarbon content, specific resistance, chemical activity, low ash content, sulfur content, phosphorus content, and volatility. Blue coke is commonly used in industries like calcium carbide, ferroalloy, ferrosilicon and silicon carbide, even as a substitute of metallurgical coke in some field [2].…”