Effect of lignin, cellulose and hemicellulose on calcium looping behavior of CaO-based sorbents derived from extrusion-spherization method

Synthesis of highly effective stabilized CaO sorbents via a sacrificial N-doped carbon nanosheet template

“…This poor cyclic stability is typically explained by sintering-induced significant loss of meso-porosity and surface area since the low Tammann temperature (T T ) of CaCO 3 (~529°C) is below typical operating temperatures for such a cycle (600-700°C for carbonation and 900-950°C for calcination). 20,21 To mitigate severe sintering, a number of thermal/chemical treatments, including hydration 22,23 , self-reactivation 24,25 , re-carbonation 26,27 , doping 28 , acidification 29,30 , and biomass templating [31][32][33][34] have been investigated to increase the porosity of raw CaO. Another approach is to stabilize the CaO structure by using high-T T stabilizers (i.e.…”

Catalpa ovata G. Don. potential medicinal value of leaves

“…During the combustion phase of the remaining components, the lignin, cellulose, and hemicellulose in the leaves of Catalpa ovata G. Don. are rapidly cracked and produce a large amount of volatilization sexual gas, causing serious weight loss of the sample [33]; the weight loss ratio of the third stage between 540-820 °C, 10 °C/min, 20 °C/min, 30 °C/ min rate is approximately 11.01%, 9.00%, 7.90%, this The differential curve of the stage is relatively flat, indicating that the pyrolysis rate is relatively stable, the sample has a slight weight loss, and the weight loss is mainly due to a small amount of polymer depolymerization and recombination in the sample [34]. The weight loss of the samples in these three stages showed different properties, with different kinetic parameters and reaction mechanism.…”

A facile one-pot synthesis of CaO/CuO hollow microspheres featuring highly porous shells for enhanced CO2 capture in a combined Ca–Cu looping process via a template-free synthesis approach

“…The combined Ca-Cu looping process, a modification of conventional calcium looping (CaL) for CO2 capture through CaO-based sorbents, [1][2][3][4][5][6] has been proposed recently to reduce the energy requirements for sorbent regeneration. [7][8][9][10] In this novel process, chemical looping combustion is integrated into the conventional CaL process by means of bifunctional CaO/CuO composites,…”