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Behaviour of Biomass Multicomponent Ashes as Adsorbents


Affiliations
1 Department of Chemical Engineering, VNIT, Nagpur 440 010, India
2 CSIR-National Chemical Laboratory, Pune 411 008, India
 

Physico-chemical characteristics of rice husk ash and baggase fly ash, commonly referred to as biomass ashes (BMA), enable their use as adsorbents. Contrary to normal expectations, it is observed that larger particles have more number, narrower and deeper pores than smaller particles. As a consequence they have higher pore volume, total surface area and hence adsorption capacity. Also, the uptake rate of adsorption depends on the silica to carbon ratio, which is seen to be smaller for larger particles and hence they take a longer time to reach equilibrium. The extent of carbon content determines the capacity, whereas silica to carbon ratio determines the kinetics of adsorption. Removal of 2,4-dichlorophenoxy acetic acid, from aqueous solution was chosen as a representative case for study and the results obtained are compared with earlier reported results.

Keywords

Adsorption Capacity, Bagasse, Biomass Ash, Rice Husk, Silica to Carbon Ratio.
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  • Behaviour of Biomass Multicomponent Ashes as Adsorbents

Abstract Views: 355  |  PDF Views: 154

Authors

Sunil K. Deokar
Department of Chemical Engineering, VNIT, Nagpur 440 010, India
Sachin A. Mandavgane
Department of Chemical Engineering, VNIT, Nagpur 440 010, India
Bhaskar D. Kulkarni
CSIR-National Chemical Laboratory, Pune 411 008, India

Abstract


Physico-chemical characteristics of rice husk ash and baggase fly ash, commonly referred to as biomass ashes (BMA), enable their use as adsorbents. Contrary to normal expectations, it is observed that larger particles have more number, narrower and deeper pores than smaller particles. As a consequence they have higher pore volume, total surface area and hence adsorption capacity. Also, the uptake rate of adsorption depends on the silica to carbon ratio, which is seen to be smaller for larger particles and hence they take a longer time to reach equilibrium. The extent of carbon content determines the capacity, whereas silica to carbon ratio determines the kinetics of adsorption. Removal of 2,4-dichlorophenoxy acetic acid, from aqueous solution was chosen as a representative case for study and the results obtained are compared with earlier reported results.

Keywords


Adsorption Capacity, Bagasse, Biomass Ash, Rice Husk, Silica to Carbon Ratio.

References





DOI: https://doi.org/10.18520/cs%2Fv110%2Fi2%2F180-186