The Calcium Looping Process for Low CO2 Emission Cement and Power

CO2 Carrying Capacities of Cement Raw Meals in Calcium Looping Systems

“…19,22,24,33,34 The theoretical synergy of CaL with cement manufacture has been investigated in previous simulation works and lab scale studies. 11,[13][14][15][17][18][19][21][22][23][24][25][26][27][28]30 However, hardly any experimental information on the performance of the raw meals as CO 2 sorbents in CaL systems is available in the literature. Only Pathi et al 21 have carried out cyclic experiments in a thermogravimetric analyzer (TGA) to study the effect of SiO 2 , Al 2 O 3 , and Fe 2 O 3 on the CO 2 carrying capacity of the CaO present in raw meals.…”

“…This essentially means that CaO, together with small amounts of ash and other products resulting from the combustion of fuel in the calciner, will be present in the carbonator during the CO 2 capture stage (as in the case of CaL systems developed for power plants). 32,33 As the individual components of the raw meal in a cement plant will need to be thoroughly mixed (to facilitate the slow solid−solid reactions involved in the formation of clinker in the kiln), the configuration will require a subsequent mixing (and probably also milling) 23 of the CaO-rich material purged from the calciner together with other additives needed for cement clinker (i.e., clay, marls, etc.) in order to obtain the desired elemental composition before it enters the kiln.…”

Calcium and chemical looping technology

“…Furthermore, in particular the building industry is cautious with respect to the production of 'new' types of cement not based on ordinary Portland cement. 5 One significant advantage that Ca-looping systems have over many others is that they can be used to decarbonise cement manufacture with minimal changes to the cement production system (Dean et al, 2011a(Dean et al, ,b, 2013Dean, Dugwell, et al, 2011a,b;Ozcan, Ahn, & Brandani, 2013;Romano et al, 2013;Telesca et al, 2014); this is discussed as part of Chapter 2.…”

Assessment of chemical absorption/adsorption for post-combustion CO2 capture from Natural Gas Combined Cycle (NGCC) power plants

“…cement industry [7]. The capture process is based on calcium oxide reaction with CO 2 at 500-600 o C to form calcium carbonate.…”

“…For calcium looping unit, the estimation of capital cost correlation was proposed by Romano et al [7] and it uses as scaling parameters the carbonator and calciner volumes and the heat input to the calciner:…”