A Development of High Power Activated Carbon Using the KOH Activation of Soft Carbon Series Cokes

Abstract

The process parameter in optimized KOH alkali activation of soft carbon series coke material in high purity was set with DOE experiments design. The activated carbon was produced by performing the activation process based on the set process parameters. The specific surface area was measured and pore size was analyzed by N 2 absorption method for the produced activated carbon. The surface functional group was analyzed by Boehm method and metal impurities were analyzed by XRF method. The specific surface area was increased over 2,000 m 2 /g as the mixing ratio of activation agent increased. The micro pores in 5~15 Å and surface functional group under 0.4 meq/g were obtained. The contents of the metal impurity in activated carbon which is the factor for reducing the electrochemical characteristics was reduced less than 100 ppm through the cleansing process optimization. The electrochemical characteristics of activated carbon in 38.5 F/g and 26.6 F/cc were checked through the impedance measuring with cyclic voltammetry scan rate in 50~300 mV/s and frequency in 10 mHz ~100 kHz. The activated carbon was made in the optimized activation process conditions of activation time in 40 minutes, mixing ratio of activation agent in 4.5 : 1.0 and heat treatment temperature over 650℃.

Analisis Performa Karbon Aktif Kulit Bawang Merah (Allium Cepa Skin) Terhadap Perubahan Karakteristik Limbah Air Accu

“…Secara umum, karbon aktif mengandung sekitar 85% hingga 95% unsur karbon [21]. Karbonaktif dapat tercipta dengan perlakuan khusus hingga memiliki parameter luas permukaan sebesar 300 hingga 2000 m 2 /gr [22]. Dengan luas permukaan tersebut, karbon aktif memiliki struktur pori internal yang dapat mengakibatkan karbon aktif memiliki sifat sebagai adsorben [23].…”

Mesopore-Rich Activated Carbons for Electrical Double-Layer Capacitors by Optimal Activation Condition

“…However, naturally occurring precursors contain large quantities of ash [22]. For the production of AC, ash causes problems such as capacity reduction, gas creation, and swelling of the EDLC [23,24]. Therefore, AC produced from naturally occurring precursors requires a separate ash removal process.…”

“…Polymeric precursors have structural features similar to those in coal, but contain many fewer mineral impurities (from catalysts), which can be controlled to very low levels during their synthesis [25]. However, polymer-based AC with high specific surface area has been reported as a result of chemical activation [17,24]. Generally, a polymer-based precursor with high carbonization yield has high crystallinity; therefore, it is difficult to produce AC having a high specific surface area by physical activation [26].…”

Activated Carbons from Thermoplastic Precursors and Their Energy Storage Applications

“…Nanocarbon materials such as carbon nanotubes and graphenes have high electrical conductivity, but they have the moderate specific surface area (under 300 m 2 /g) and are expensive and even low-density, resulting in low capacitance per unit volume [1,6]. Although activated carbons have specifically lower electrical conductivity than nanocarbons, they are the most widely used active materials for EDLC due to their excellent high specific surface area (compared to graphene [1,6] and carbon nanotube [1,7,8]), energy density, and price competitiveness [5,9].…”