CO2 capture and MWCNTs synthesis using mesoporous silica and zeolite 13X collectively prepared from bottom ash

摘要: Abstract Ground power plant bottom ashes were alkali-fused at 600 °C for 1 h and silicate extraction was conducted in water room temperature. The supernatant solution then used to make mesoporous silicas after adding a triblock copolymer, Pluronic P123, as template, whereas the solid precipitate zeolite 13X. This combined synthesis scheme enabled high levels of recycling close 100%. silica prepared using butanol swelling agent (MS-b) resulted higher surface areas pore volumes than those mesitylene (MS-m). MS-b, support material impregnating PEI (polyethyleneimine) capturing CO 2 , achieved excellent capture capacity (218 mg/g-adsorbent with 70 wt% PEI) 75 °C. Removal portion species by aqueous rendered composition remaining more favorable 13X synthesis, lower Si/Al ratio led increased carbon dioxide adsorption. Finally, content Fe impurity (ca. 12.6 wt%) remained porous structure 13X, enabling uniform growth multi-wall nanotubes (MWCNTs) chemical vapor deposition quartz reactor acetylene source 700 °C.