This study investigated the effect of HCl in biomass gasification producer gas on CO2 capture efficiency and contaminants removal by CaO-Fe2O3 based sorbent material calcium looping process. Experiments were conducted a fixed bed reactor to from with combined at 200 ppmv, H2S 230 NH3 2300 ppmv. The results show that presence feeding gas, reactivity for was enhanced. maximum achieved carbonation...

We report herein a straightforward and label-free approach to prepare luminescent mesoporous silica nanoparticles. We found that calcination at 400 °C can grant mesoporous organosilica nanoparticles with strong fluorescence of great photo- and chemical stability. The luminescence is found to originate from the carbon dots generated from the calcination, rather than the defects in the silica mat...

Attrition of six different limestones was studied during calcium looping cycles for CO2 capture in a lab-scale fluidized bed apparatus. The tests were carried out under realistic conditions representative of a process with calcination in an oxy-firing environment. The focus of the activity was to investigate the effect of the presence of SO2 both in the calcination and in the carbonation stages...

A series of ZnO/Al2O3 mixed oxide samples with varying Zn/Al ratio is prepared by coprecipitation, ageing, drying, and calcination. Samples are investigated in the state after drying and calcination. The applied methods include X-ray diffraction, solid-state 27Al magic-angle spinning nuclear magnetic resonance spectroscopy, transmission electron microscopy and thermogravimetric experiments coup...

A numerical model coupling transient radiative, convective, and conductive heat transfer, mass transfer, and chemical kinetics of heterogeneous solid–gas reactions has been developed for a semitransparent, non-uniform, and non-isothermal particle undergoing cyclic thermochemical transformations. The carbonation–calcination reaction pair for calcium oxide looping is selected as the model cycle b...

The monoclinic BiVO4 in a powder state was prepared via hydrothermal method, with the addition of KCl as structure-directing agent. as-prepared sample calcined at different temperatures (400–600 °C), either air or Ar gas. It is found that, though morphology and crystal structure mostly remain unchanged, bandgap properties are modified during calcination. A detailed analysis surface chemical sta...

silica exists in rice husk, an agriculture waste, as a naturally occurring phase. in first step, acidic pre-treatment and calcination of the rice husk were performed to obtain nano-silica, in which various sizes of the nano-silica, totally with sizes under 80 nm, were achieved. second, to reduce nano-silica to elemental si and subsequently formation of the composite, mg used as the reducing age...