scholarly journals RESEARCH ON THE ABILITY OF HANDLING AMMONIA CONTAMINATED AIR STREAM BY ACTIVATED CARBON MATERIALS FROM COCONUT FIBER (AC-1) AND PEANUT HUSK (AC-2), IMPREGNATED WITH ZnCl2

2018 ◽  
Vol 55 (4C) ◽  
pp. 38
Author(s):  
Nguyen Thi Kim Anh
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Gas Flow ◽  
Carbon Materials ◽  
Ammonia Removal ◽  
Ammonia Emission ◽  
Inlet Concentration ◽  
Coconut Fiber ◽  
Waste Gas ◽  
Air Stream

This research aimed to investigate the ability of handling ammonia emission from waste gas by adsorption methods. The absorbents were activated carbon materials, which were made from coconut fiber (AC-1) and peanut husk (AC-2), impregnated with ZnCl2. Both of these materials have shown their abilities to remove NH3 (over 90 % efficiency) at the concentration of about 9000 ppm, while the removal efficiency of commercial activated carbon (AC-3) was 70 %. At the inlet concentration of about 3000 ppm, the maximum ammonia removal efficiency was 96.23 % when using AC-1 and 97.74 % using AC-2. The saturation time of each activated carbon was also examined. At inlet concentration of 2800 – 3200 ppm with gas flow rate was 0.4 L.min-1 and 5 g in mass material, the ammonia removal efficiencies of AC-1 and AC-2 were maintained at 80 % lasting for 600 minutes, but the efficiency of AC-3 rapidly decreased to 30 %. In all experiments, the activated carbon that made from peanut husk (AC-2), impregnated with ZnCl2 showed higher performance than one made from coconut fiber (AC-1) and commercial activated carbon (AC-3).

Study on the Treatment of Nitrogen Oxides by Compound Bio-Filter

2012 ◽  
Vol 610-613 ◽  
pp. 1824-1828
Author(s):  
Zhi Fei Liu ◽  
De Hong Pang
Keyword(s):  
Removal Efficiency ◽  
Gas Flow ◽  
Load Capacity ◽  
Packing Material ◽  
Operating Conditions ◽  
Inlet Concentration ◽  
Trickling Filter ◽  
Spray Volume ◽  
Packing Layer ◽  
Empty Bed Residence Time

Activated carbon and wood chips were applied respectively as packing material of bio-trickling filter and bio-filter which composed the compound bio-filter and the effect of different operating parameters on NOx removal efficiency were studied. The results show that the best operating conditions of the compound bio-filter are: NO inlet concentration 604.5 mg/m3, spray volume 1.2 L/h, gas flow 0.6 m3/h(empty bed residence time 103.7 s).In such cases,NOx removal efficiency is over 96% and NOx removal load of the packing material is 29.66 g/(m3•h) . The remove of NOx is mainly completed by the packing layer of 0~50 cm height both in the bio-trickling filter and in the bio-filter, that is to say ,when the total packing layer height of the compound bio-filter is 100 cm, the purification effect is ideal and economical; The system can return to normal in about 7 hr when the dynamic load changes largely and suddenly, showing that it has strong anti shock load capacity.

scholarly journals Dry filtration technology application with activated carbon media to remove odor ammonia emissions from production process feed mill industry

2021 ◽  
Vol 896 (1) ◽  
pp. 012047
Author(s):  
N Harihastuti ◽  
S Djayanti ◽  
I R J Sari
Keyword(s):  
Air Pollution ◽  
Activated Carbon ◽  
Gas Flow ◽  
Pilot Project ◽  
Ammonia Removal ◽  
Poultry Feed ◽  
Ammonia Emissions ◽  
Technology Application ◽  
Filtration Technology ◽  
Feed Mill

Abstract A pilot project research has been conducted to eliminate odor pollution from the feed mill industry. The feed industry in Indonesia has grown, especially in poultry feed production produced in modern feed mills equipped with pelleting technology. This industry is also having an environmental impact in the form of air pollution of its production activities. The laboratory analysis showed that ammonia has emitted, and it was the dominant parameter as the cause of odor in air pollution. This research aims to remove ammonia emissions using dry filtration technology with activated carbon as the filter media in the upright reactor. The reactor is designed from stainless steel material, consisting of 3 trays. The distance between trays is 300 mm, the dimensions of the tray are L.2430 mm, W.1815 mm, H.600 mm, the tray hole diameter is 3 mm. The average gas flow rate is 200-300 Nm3/min. Activated carbon used granules, size 6-8 mm, 200 mm thick in the tray. The results showed that the efficiency of ammonia removal was 81.96%-94.40% and had met the quality standards. This technology is feasible to control ammonia as an odor pollutant in the feed mill industry.

scholarly journals Treatment of benzene vapors from contaminated air stream in a laboratory-scale compost biofilter

2009 ◽  
Vol 28 (1) ◽  
pp. 119 ◽  
Author(s):  
Eldon R. Rene ◽  
D. V. S. Murthy ◽  
T. Swaminathan
Keyword(s):  
Gas Flow ◽  
Substrate Inhibition ◽  
Laboratory Scale ◽  
Treatment Technology ◽  
Porous Support ◽  
Waste Gas ◽  
Process Waste ◽  
Air Stream ◽  
High Concentrations ◽  
Filter Bed

Biofiltration of process waste–gas streams using microorganisms attached to porous support matrix, at low concentrations and high gas flow rates, has gained importance as a versatile treatment technology ever since the Clean Air Act Amendments (1990), by the US – EPA came into existence. In this study, we evaluated the potential of a laboratory–scale biofilter, inoculated with mixed culture, to remove gas–phase benzene from a synthetic waste gas stream. Experiments were conducted in three different phases, after the acclimatization step, corresponding to empty bed residence times (EBRT) varying between 0.81–2.45 min and benzene concentrations up to 1.7 g/m3. At high concentrations, significant reduction in removal efficiency was observed, which may be due to insufficient biomass in the filter bed to utilize the substrate, or due to substrate inhibition at high concentrations. Removal efficiencies higher than 90% were achieved for inlet benzene loading rates lesser than 40 g/m3hr.

Degradation of Organophosphorus Pesticide in a Packed-Bed Plasma Reactor: Effects of Operating Parameters and Kinetics Study

2013 ◽  
Vol 781-784 ◽  
pp. 1637-1645 ◽  
Author(s):  
Ting Jun Ma ◽  
Yi Qing Xu
Keyword(s):  
Removal Efficiency ◽  
Flow Rate ◽  
Gas Flow ◽  
Plasma Reactor ◽  
Organophosphorus Pesticide ◽  
Packed Bed ◽  
Pulse Frequency ◽  
Gas Flow Rate ◽  
Peak Voltage ◽  
Initial Concentration

The degradation effectiveness and reaction kinetics of representative organophosphorus (OP) pesticide in a packed-bed plasma reactor have been studied. Important parameters, including peak voltage, pulse frequency, gas-flow rate, initial concentration, diameter of catalyst particles, and thickness of catalyst bed which influences the removal efficiency, were investigated. Experimental results indicated that rogor removal efficiency as high as 80% can be achieved at 35 kV with the gas flow rate of 800 mL/min and initial concentration of 11.2 mg/m3.The removal efficiency increased with the increase of pulsed high voltage, and pulse frequency, the decrease of the diameter of catalyst particles and the thickness of catalyst bed. Finally, a model was established to predict the degradation of the rogor, which generally can simulate the experimental measurements to some degree.

An effective approach for modifying carbonaceous materials with niobium single sites to improve their catalytic properties

2015 ◽  
Vol 44 (46) ◽  
pp. 19956-19965 ◽  
Author(s):  
A. S. Bozzi ◽  
R. L. Lavall ◽  
T. E. Souza ◽  
M. C. Pereira ◽  
P. P. de Souza ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Activated Carbon ◽  
Carbon Materials ◽  
Catalytic Properties ◽  
Carbonaceous Materials ◽  
Simple Route ◽  
Catalytically Active

In this paper we show a very simple route for the incorporation of catalytically active niobium species on the surface of carbon materials, such as graphene oxide, carbon nanotubes and activated carbon.

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