Physicochemical and microtextural characterization of activated carbons produced from water steam activation of three bamboo species

González, P.G.; Pliego-Cuervo, Y.B.

doi:10.1016/j.jaap.2012.11.004

Cited by 45 publications

(14 citation statements)

References 37 publications

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“…Proximate analysis of precursor The raw material sample was characterized for proximate analysis by using American Society for Testing and Materials standard in order to determine the moisture content of bamboo (ASTM D 2867-99), the presence of volatile matter (ASTM D 5832-98), the ashes content (ASTM D 2866-94) and the amount of fixed carbon and waxes composition [7].…”

Section: Preparation Of Activated Carbonmentioning

confidence: 99%

Characterization of Activated Carbon Using Chemical Activation via Microwave Ultrasonic System

2017

MJAS

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Higher adsorption capacities of activated carbon (AC) can be evaluate according to pore volume, porosity and surface area. AC with higher pore volume, porosity and surface area desired in the present study in order to enhance the properties of AC supercapacitor. Thus, the present studies focus on the chemical activation process to increase the characterization of AC. The study was using bamboo waste as a precursor and the activation process was conducted using microwave ultrasonic system. The chemical agent used during the process was KOH and H 2 SO 4 . Microwave activation was conducted at intensity 100 W and 300 W for 30 min and sonication frequency was constantly set at 200 Hz for 60 min. The sample was carbonized at temperature of 400 ºC and 800 ºC using furnace for 2 hours. Then, AC was characterized for surface area using BET analysis and functioning group using FTIR analysis. The results shown the carboxyl, aliphatic, aromatic and phenolic hydroxyl group are present on raw bamboo while new functional group such as alkyl halide and some of some weak bands appeared which analogous with out of plane bending mode of the C-H or O-H group occur for AC. Active surface area and total pore volume of AC supercapacitor in 5M of concentration for H 2 SO 4 and KOH corresponded to 1167 m 2 /g, 0.724 cm 3 /g, 740.10 m 2 /g, 0.462 cm 3 /g, respectively.Keywords: supercapacitor, microwave-ultrasonic, activation, chemical, carbonization Abstrak Kapasiti penjerapan yang tinggi pada karbon teraktif boleh dinilai mengikut isipadu liang, keliangan dan luas permukaan. Keaktifan karbon dengan isi padu liang yang tinggi, tahap keliangan yang besar dan luas permukaan yang tinggi amat dikehendaki di dalam kajian ini bagi meningkatkan sifat-sifat keaktifan karbon superkapasitor. Oleh itu, kajian ini memberi tumpuan kepada proses pengaktifan kimia untuk meningkatkan pencirian yang diperlukan dalam karbon aktif. Kajian ini telah menggunakan sisa buluh sebagai pelopor dan proses pengaktifan telah dijalankan menggunakan sistem ultrasonik-gelombang mikro. Agen kimia yang digunakan semasa proses pengaktifan adalah KOH dan H 2 SO 4 . Pengaktifan gelombang ketuhar telah digunakan pada intensiti 100 W dan 300 W selama 30 min dan kekerapan sonikasi telah ditetapkan pada 200 Hz selama 60 min. Sampel telah dikarbonisasi pada suhu 400 ºC dan 800 ºC mengunakan relau selama 2 jam. Kemudian, karbon aktif dikelaskan bagi mendapatkan luas permukaan dengan menggunakan analisis BET dan kumpulan berfungsi pula menggunakan analisis FTIR. Keputusan menunjukkan karboksil aliphatik, aromatik dan kumpulan fenolik hidrosil hadir pada bahan asas buluh manakala kumpulan berfungsi baharu seperti alkil halida dan beberapa kumpulan yang lemah muncul dimana serupa dengan lenturan mod bagi C-H atau O-H yang terhasil pada karbon aktif. Kawasan permukaan yang aktif dan jumlah isipadu liang

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Section: Preparation Of Activated Carbonmentioning

confidence: 99%

Characterization of Activated Carbon Using Chemical Activation via Microwave Ultrasonic System

2017

MJAS

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“…AC has been proven to adsorb Hg(II) contained in the water with a high adsorption capacity. The adsorption studies have been conducted previously using AC made from various sources, such as lignocellulosic materials (Arias et al 2017), sugarcane bagasse (Sun et al 2018), scallop shells (Hassan & Hrdina 2018), exhausted coffee waste (Alvarez et al 2018), flamboyant pods (Vargas et al 2010), coconut shell (Cazetta et al 2011) and bamboo (Gonzalez & Pliego-Cuervo 2013). Referring to the results of numerous studies, the AC surface area is a major factor affecting the adsorption process.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Mercury(II) using Activated Produced from Bambusa vulgaris var. striata in a Fixed Bed Column

Mistar¹,

Hasmita²,

Alfatah³

et al. 2019

JSM

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Pollution by mercury dissolved in aqueous media causes a crucial problem for health and environment. In this study, activated carbon from Bambusa vulgaris var. striata was produced by chemical activation using NaOH for mercury adsorption. The effects of mercury initial concentrations namely 50 and 100 mg/L on the breakthrough characteristics of the adsorption process were defined. The mechanism of the adsorption process through the fixed-bed column was fitted to the Thomas model. The activated carbon was characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The adsorption study with a continuous system and using the Thomas model showed that the highest adsorption capacity (q 0) of mercury ions is 218.08 mg/g. It can be concluded that activated carbon from Bambusa vulgaris var. striata has a great potential to act as an adsorbent to remove mercury from water.

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“…ACNFs are microporous carbonaceous adsorbents developed from organic precursors, by either physical or chemical activation [9][10][11][12][13][14]. The advantages of ACNFs are smaller fiber diameter, more concentrated pore-size distribution, and excellent adsorption capacity at low concentrations, in comparison with conventional activated granular or powdered carbons [11].…”

Section: Introductionmentioning

confidence: 99%

Effects of carbonization temperature on pore development in polyacrylonitrile-based activated carbon nanofibers

Lee¹,

An²,

Kim³

2014

Carbon letters

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In this work, activated carbon nanofiber (ACNF) electrodes with high double-layer capacitance and good rate capability were prepared from polyacrylonitrile nanofibers by optimizing the carbonization temperature prior to H 2 O activation. The morphology of the ACNFs was observed by scanning electron microscopy. The elemental composition was determined by analysis of X-ray photoelectron spectroscopy. N 2 -adsorption-isotherm characteristics at 77 K were confirmed by Brunauer-Emmett-Teller and Dubinin-Radushkevich equations. ACNFs processed at different carbonization temperatures were applied as electrodes for electrical double-layer capacitors. The experimental results showed that the surface morphology of the CNFs was not significantly changed after the carbonization process, although their diameters gradually decreased with increasing carbonization temperature. It was found that the carbon content in the CNFs could easily be tailored by controlling the carbonization temperature. The specific capacitance of the prepared ACNFs was enhanced by increasing the carbonization temperature.

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Physicochemical and microtextural characterization of activated carbons produced from water steam activation of three bamboo species

Cited by 45 publications

References 37 publications

Characterization of Activated Carbon Using Chemical Activation via Microwave Ultrasonic System

Characterization of Activated Carbon Using Chemical Activation via Microwave Ultrasonic System

Adsorption of Mercury(II) using Activated Produced from Bambusa vulgaris var. striata in a Fixed Bed Column

Effects of carbonization temperature on pore development in polyacrylonitrile-based activated carbon nanofibers

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