The Modification of Charcoal for Ammonia Removal

Supitcha  Rungrodnimitchai; Suphatra Hiranphinyophat

doi:10.4028/www.scientific.net/KEM.834.3

Paper Titles

Preface

The Modification of Charcoal for Ammonia Removal
p.3

Comparison of Thermal and Electrical Sintering of Aerosol Silver Nanoparticles in Process of Aerosol Jet Printing
p.10

Hybrid Approach for Optimizing Process Parameters in Biodiesel Production from Palm Oil
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Application of System Analysis for Technological Processes Investigation
p.24

The Catalytic Oxidation of Benzene by Hopcalite under Microwave Irradiation
p.32

Comparison of Laser Sintering of Silver Nanoparticles in Form of Microdroplets of Nanoink and Dry Nanoparticles Obtained in a Gas Discharge
p.37

Extraction of Sulfur from Commercial Gasoline Using 1-Butyl-3-Methylimidazolium Tetrafluoroborate [BMIM] [BF₄] as the Extraction Solvent
p.42

Synthesis of Porous ZnO Films on Quartz Substrates by Thermal Oxidation and the Oxidant Atmosphere Effect
p.49

HomeKey Engineering MaterialsKey Engineering Materials Vol. 834The Modification of Charcoal for Ammonia Removal

The Modification of Charcoal for Ammonia Removal

Abstract:

Modified charcoal was prepared from the oxidation of charcoal using the HNO₃/H₃PO₄-NaNO₂ system in a range of temperatures from 30 to 50 °C for 24 to 72 hours of reaction time. The reaction was the oxidation by cleavage of a double bond and converting it into a carboxyl group (-COOH) or carbonyl group (-C=O). The results showed that the carboxyl content of the modified charcoal (MC) increased with an increase in reaction time and temperature. The condition at 50°C for 60 hours yielded the MC with a carboxyl content of 1.81 mmol/g. Fourier transform infrared spectrometry (FT-IR) revealed that MC had a new adsorption peak at 1712 cm^-¹. The oxygen content of modified charcoal also increased, suggesting the formation of carboxyl or carbonyl groups in the products after the oxidation. Brunauer-Emmett-Teller (BET) analysis and scanning electron microscopy (SEM) images demonstrated an increase in porosity of the MC. The maximum capacity of ammonia adsorption of MC was 6.14 mg/g.

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Key Engineering Materials (Volume 834)

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3-9

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https://doi.org/10.4028/www.scientific.net/KEM.834.3

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Online since:

March 2020

Authors:

Supitcha Rungrodnimitchai*, Suphatra Hiranphinyophat

Keywords:

Adsorbent, Ammonia, Charcoal, Modification, Oxidation

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