Characterization of Bottom Ash Waste Adsorbent from Palm Oil Plant Boiler Burning Process to Adsorb Carbon Dioxide in a Fixed Bed Column

Novi Sylvia; Fitriani Fitriani; Rozanna Dewi; Rizka Mulyawan; Abrar Muslim; Husni Husin; Yunardi Yunardi; Mutia Reza

doi:10.22146/ijc.66509

Characterization of Bottom Ash Waste Adsorbent from Palm Oil Plant Boiler Burning Process to Adsorb Carbon Dioxide in a Fixed Bed Column

https://doi.org/10.22146/ijc.66509

Novi Sylvia⁽¹⁾, Fitriani Fitriani⁽²⁾, Rozanna Dewi⁽³⁾, Rizka Mulyawan⁽⁴⁾, Abrar Muslim⁽⁵⁾, Husni Husin⁽⁶⁾, Yunardi Yunardi^(7*), Mutia Reza⁽⁸⁾

(1) Doctoral Program, School of Engineering, Post Graduate Program, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia Department of Chemical Engineering, Malikussaleh University, Lhokseumawe, 24351, Indonesia
(2) Department of Chemical Engineering, Malikussaleh University, Lhokseumawe, 24351, Indonesia
(3) Department of Chemical Engineering, Malikussaleh University, Lhokseumawe, 24351, Indonesia
(4) Department of Chemical Engineering, Malikussaleh University, Lhokseumawe, 24351, Indonesia
(5) Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
(6) Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
(7) Department of Chemical Engineering, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
(8) Department of Chemical Engineering, Institut Teknologi Kalimantan, Indonesia
(*) Corresponding Author

Abstract

Palm oil bottom ash utilization from mill boilers as CO₂ adsorbent has been in use for few years. This study aims to examine adsorbent characteristics and capabilities of bottom ash produced from boiler combustion in palm oil industry for CO₂ adsorption before and after utilization, such as compound functional group using the Fourier Transform Infra-Red (FT-IR) spectrophotometer, adsorbent morphology through Scanning Electron Microscopy (SEM), and compound amount using Energy Dispersive X-Ray Spectroscopy (EDX). The CO₂ adsorption was carried out in fixed-bed column. Process variables consist of volumetric flow rate, contact time and bed height. Results showed that SiO₂ compounds in the heterogeneous form with average particle size of 1073 nm, as supported by FT-IR spectrum finding indicating SiO₂ signal at wavelength of 958–954 cm^–1. Additionally, EDX analysis showed Silica and Oxygen content of 11.88% and 36.90%, resulting 70% CO₂ adsorption capacity of 0.350 mg/g at discharge of 5 L/min, contact time of 40 min, and bed height of 12 cm. Langmuir isotherm model was obtained with R² of 0.998, q_m of 1.588, and k_L of 0.144. Meanwhile, the kinetic model followed a simple first-order prototypical with R² of 0.952, C0₂ of 0.260, and k₁ of 0.006.

Keywords

adsorption; adsorbent; bottom ash; CO2 gas; fixed-bed column

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References

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DOI: https://doi.org/10.22146/ijc.66509