Ammonia adsorption in a fixed bed of activated carbon
Abstract
The rise in atmospheric pollution caused by gases such as ammonia has led many researchers to conduct studies aimed at decreasing or treating the emissions of such polluting gases. The present work attempted to study the adsorption of ammonia in the fixed bed of activated carbon as a means to treat its emissions. The effects of the initial concentration of ammonia (C0) and of the bed temperature (TL) on the adsorption of ammonia by the activated carbon were also considered. Adsorption capacity of activated carbon was determined using data from the breakthrough curves and from a balance of mass in the bed. Adsorption capacities were obtained employing the Langmuir and Freudlich isotherms. The results showed that within the NH3 concentration range of 600-2400 ppm, adsorption capacity varied from 0.6 to 1.8 mg NH3/g carbon at 40 degrees C, from 0.2 to 0.7 mg NH3/g carbon at 80 degrees C and from 0.15 to 0.35 mg NH3/g carbon at 120 degrees C. These numbers highlight the tendency toward a lower adsorption capacity with the decrease in temperature. As to mass of the bed, this latter variable had no significant influence over adsorption capacity.
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NH4+ adsorption capacities of commercial coconut shell activated carbon prepared at 600°C and 400°C were 2400 and 600 to 1800 mg NH3 kg-1 carbon, respectively.
“The NH4 + adsorption capacities of commercial coconut shell activated carbon prepared at 600 o C and 400 o C were found to be 2400 and 600 to 1800 mg NH3 kg -1 carbon, respectively (Rodrigues et al., 2007).”
From A review on biochar modulated soil condition improvements and nutrient dynamics concerning crop yields: Pathways to climate change mitigation and global food security (2019) · cites this paper as Rodrigues et al., 2007
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- Authors
- RODRIGUES, C., DEMORAESJR, D., DANOBREGA, S., & BARBOZA, M.
- Affiliations
- Universidade Federal de Alagoas (BR)
- Universidade Santa Cecília (BR)
- Corresponding author
- RODRIGUES, C
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2007-03
- Volume
- 98
- Issue
- 4
- Pages
- 886-891
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2092392269
- Cited by
- 155
- References
- 12
- Citations by year
- 2026: 9 · 2025: 8 · 2024: 11 · 2023: 16 · 2022: 11 · 2021: 10 · 2020: 8 · 2019: 6 · 2018: 8 · 2017: 9 · 2016: 10 · 2015: 5 · 2014: 4 · 2013: 5 · 2012: 9
- FWCI
- 9.42
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Industrial Gas Emission Control
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Odor and Emission Control Technologies
- Keywords
- ammonia adsorption, activated carbon, fixed-bed adsorption, breakthrough curves, adsorption capacity, temperature effects, Langmuir isotherm, Freundlich isotherm, air pollution control, ammonia emissions
- MeSH terms
- Adsorption, Ammonia, Carbon
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