Synthesis of Mesoporous Silica from Bottom Ash Waste for CH₄Adsorption

Abstract

The aim of this research is to synthesize mesoporous silica directly from the bottom ash waste through the melting method using alkali at high temperatures. The resulting mesoporous silica will be used as CH4 gas adsorbent. The bottom ash waste was firstly separated by Fe and Ca using 37% HCl followed by melting at high temperatures and producing silica extract. The extract will be used as the basic material for making mesoporous silica which impregnation with PEG 4000. The resulting solids will then be characterized using XRD and BET. The result of mesoporous silica was then carried out by measuring CH4 gas adsorption capacity by gravimetric method with interval temperature of 30, 40, and 50 °C and pressure of 1, 3, and 5 atm.

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

“…Adsorption equilibrium, which is generally studied through the adsorption isotherm approach, is an essential foundation for understanding an adsorption process, especially for finding out how many adsorbate molecules can be adsorbed by a porous material. The adsorption equilibrium model for pure components was based on Langmuir's [14][15] theory about monolayer adsorption on an ideal surface. Langmuir and Freundlich's models are used to represent data adsorption balance.…”

“…The adsorption method is preferable to the absorption method due to adsorption is more economical, able to remove organic materials, and no poisonous side effects occur [15]. Furthermore, the adsorption method is a promising alternative to adsorb CO2, considering its relatively inexpensive, more straightforward process and no liquid waste produced [4].…”