Search Results

Now showing 1 - 4 of 4

Some of the metrics are blocked by your
consent settings
High performance nanoporous carbon from mulberry leaves (Morus alba L.) residues via microwave treatment assisted hydrothermal-carbonization for methyl orange adsorption: Kinetic, equilibrium and thermodynamic studies
(2022-03-01)
Siraorarnroj, Siwat
;
Kaewtrakulchai, Napat
;
Fuji, Masayoshi
;
Eiad-ua, Apiluck
High performance nanoporous carbons were directly prepared from mulberry leaves (Morus alba L.) residues by the hydrothermal-carbonization with chemical reagent combined the microwave-assisted treatment. The as-purified ML porous carbon (MPC) was successfully applied for the adsorption of methyl orange, which is one of crucial waste-water pollutants left from an industrial sector. The MPC sample obtained from the hydrothermal process (200 °C, 12 h) using an activation of 15 wt% NaOH (700 °C, 2 h), and combined with microwave treatment at 700 W for 6 min, specifically exhibited micropores and mesopores in the MPC morphological structure. Accordingly, the highest S<inf>BET</inf> was approximately 791.79 m2/g with the total pore volume of 0.495 cm3/g. Moreover, the adsorption performance test of MPC was conducted by the shaking unit using 100 ppm methyl orange concentration. The MPC showed the highest methyl orange-adsorption uptake of 99% at 30 °C under an ambient pressure (1 atm). The development of mulberry leaves (Morus alba L.) residues into porous carbon exhibited a great attention for dyes adsorption with a rapid adsorption kinetic, and excellent adsorption capacity, which are a promising-characteristics for practical waste-water adsorption experiments.
Some of the metrics are blocked by your
consent settings
Fundamental study of carbon materials from empty fruit bunch via hydrothermal carbonization with H3PO4 and naoh activation
(2020-01-01)
Guntagerng, Kanogpan
;
Panomsuwan, Gasidit
;
Fuji, Masayoshi
;
Eiad-ua, Apiluck
Lignocellulosic biomass has great potential as an energy source or feedstock for further conversion. Empty fruit bunches (EFBs) were agricultural waste materials from palm oil production. In this research, we aim to study the morphology of hydrochars derived from EFBs via hydrothermal treatments with phosphoric acid (H<inf>3</inf>PO<inf>4</inf>) and sodium hydroxide (NaOH) activation at different concentrations (i.e., 0.5, 0.7, and 1 M) at 200°C for 12 h, followed by carbonization at 700°C under nitrogen atmosphere for 2 h. The samples were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and specific surface analysis. After carbonization, the hydrochar activated by 1.0 M H<inf>3</inf>PO<inf>4</inf> possessed the highest surface area of 590 m2/g with the dominance of micropores. Hydrothermal carbonization with acid-base activation showed an effective method in preparing high porous activated carbon from EFB.
Some of the metrics are blocked by your
consent settings
Preparation of monometallic catalysts on carbon support for synthesis of biodiesel fuel
(2019-01-01)
Longprang, Tripob
;
Udomsap, Parncheewa
;
Chollacoop, Nuwong
;
Fuji, Masayoshi
;
Eiad-Ua, Apiluck
Monometallic catalysts have been prepared on nano-porous carbon support materials by way of hydrothermal carbonization of Cattail (genus Typha) leaves. The catalysts are for synthesis of biodiesel fuel. This research studied the effect of hydrothermal temperature (at 160-200 °C), reaction time (4-24 h) and the presence of KOH on the activated porosity of a carbon support. Then the type of loaded metal catalyst (Mn, Fe, Co, Ni, Cu and Pb), placed on the carbon support by an impregnation method, was investigated. This led to partial hydrogenation catalytic activity forming biodiesel. The carbonization temperature was studied in the range 500-900 °C for 2 hours. The samples were characterized by scanning electron microscopy, nitrogen sorption, fourier transform infrared spectroscopy and X-ray diffraction. The results indicated that the hydrothermal process at 200 °C for 12 hours exhibited the highest surface area, porosity and pore volume. This led to an appropriate distribution of metal on the carbon support surface.
Some of the metrics are blocked by your
consent settings
Effects of transition metal during the hydrothermal carbonization on characteristics of carbon materials
(2018-09-05)
Sangjumras, Peeranuch
;
Udomsap, Parncheewa
;
Kaewtrakulchai, Napat
;
Eiad-Ua, Apiluck
;
Fuji, Masayoshi
Biomass from the agriculture wastes can be transformed to valuable carbon support through hydrothermal carbonization (HTC). In this study, the biomass was hydrothermally treated at 200°C for 24 h in the presence of transition metals as catalysts. Various types of metal-salt solutions comprising of Cu(NO<inf>3</inf>)<inf>2</inf>, Cd(NO<inf>3</inf>)<inf>2</inf>, Fe(NO<inf>3</inf>)<inf>3</inf>, Ni(NO<inf>3</inf>)<inf>2</inf> and Ba(NO<inf>3</inf>)<inf>2</inf> with a concentration of 5 wt% during HTC, were investigated to study their effects on surface functional characteristics and morphological appearance of the synthesized carbons, which were subsequently characterized using FT-IR, and SEM analyses. Furthermore, the remaining metal particles on the synthesized carbon surface were found to be effective for catalytic applications. Thus, HTC of agriculture by-products in combination with the addition of transition metals would be an effective technique to prepare catalysts in a facile way.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results