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2) Capture by Calcium-Based Industrial Solid Wastes in Calcium Looping Process
Published in Tushar Kanti Sen, Air, Gas, and Water Pollution Control Using Industrial and Agricultural Solid Wastes Adsorbents, 2017
Yingjie Li, Xiaotong Ma, Lunbo Duan, Chunmei Lu
It is believed that anthropogenic CO2 emission due to the combustion of fossil fuels has become a major contributor to global climate warming. The calcium looping process (CLP), that is, carbonation–calcination cycles of the CaO-based sorbent, has attracted increasing attention as one of the most effective ways to capture CO2 from flue gas streams at high temperature (Asiedu-Boateng et al. 2016).
Power Generation and Refrigeration
Published in Marc J. Assael, Geoffrey C. Maitland, Thomas Maskow, Urs von Stockar, William A. Wakeham, Stefan Will, Commonly Asked Questions in Thermodynamics, 2022
Marc J. Assael, Geoffrey C. Maitland, Thomas Maskow, Urs von Stockar, William A. Wakeham, Stefan Will
Calcium looping is a CO2 capture process based onpassing a flue gas containing CO2 through a fluidized bed (carbonator reactor) of calcium oxide (lime), whereby the CO2 and lime combine to form calcium carbonateCaO+CO2→CaCO3ΔrH⦵=−178kJ/mol,transferring the calcium carbonate to a calciner reactor where it is heated to release CO2, while itself reverting to calcium oxide which is recycled to the carbonator to capture more CO2CaCO3→CaO+CO2ΔrH⦵=178kJ/mol.
A State-Of-The-Art Review on Materials Production and Processing Using Solar Energy
Published in Mineral Processing and Extractive Metallurgy Review, 2023
Nevertheless, the CaCO3-CaO looping involves, as in other materials for cycles of metal oxide-metal for solar fuels, several cycles, and these must resist numerous cycles to have interest in energy storage applications. Tregambi et al. (2018a) did experimental work in the calcium looping process for CO2 capture using Italian limestone treated in a solar power source simulator for the calcination and later carbonation. Results were compared with those obtained using electrical heating. This resulted in the case of the solar process in overheating of the upper section of the bed as compared with the bulk of the bed, smaller CO2 uptakes and more deactivation of the sorbent than in the case of the non-solar process. Encouraging results were obtained although further investigation (regarding radiative flux or preconditioning of sorbent samples, among others) should be carried out to optimize the process. Alvarez-Rivero et al. (2022) proposed a detailed review of solar reactors for the calcium looping process, which is based on the calcination-carbonation reaction cycle of CaCO3-CaO using concentrated solar energy. Solid-gas reactors for calcination of calcium carbonate have a total efficiency ranging from 16.6% to 88% for a mass flow rate up to 25 kg·h−1 and a power of up to 55 kW. They made a detailed comparison with advantages and disadvantages of the different types that exist for this purpose. Regarding the calcination of the CaCO3, the section dedicated to the production of cement includes more references about the topic.
Synergizing hydrogen and cement industries for Canada’s climate plan – case study
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021
Rami S. El-Emam, Kamiel S. Gabriel
In several studies in the literature, hydrogen was investigated as a main player for greening the cement industry (i.e. reducing its carbon footprint) by utilizing the recovered waste heat for hydrogen production using thermal-assisted water splitting technologies. A comprehensive thermal and cost analyses were performed by (Ishaq et al. 2019) on heat recovery from furnace cement slag before reaching its solidification temperature of 650C for hydrogen production using thermochemical copper chlorine (Cu-Cl) cycle. The use of chemical heat pump system to upgrade the low quality flue gas from the precalciner step in cement production process was studied by (Odukoya and Naterer, 2014). They investigated the upgrading of this stream from 340C to feed the heat required for the oxygen decomposition reaction of the Cu-Cl thermochemical hydrogen production cycle. Other studied considered hydrogen production from coupling gasification process to the cement production (Weil et al. 2006) and from calcium looping cement production which brings carbon dioxide capture along with hydrogen production (Dean et al. 2011).
An overview of alternative raw materials used in cement and clinker manufacturing
Published in International Journal of Sustainable Engineering, 2021
Sabah Ahmed Abdul-Wahab, Hilal Al-Dhamri, Ganesh Ram, Vishnu P. Chatterjee
The carbon capture technology, a breakthrough innovation but still requires industrial level study, shows promising influence in supporting to achieve commitment under the Paris Agreement which calculates the reduction of annual CO2 emission by the energy sector by 60% from current levels in 2050. By capturing post-combusted carbon dioxide by suitable absorbers like certain amines, special capturing membranes, or by calcium looping using calcium oxide and utilisation as carbon feedstock or for fuel production seen as the best option for a significant reduction in CO2. Schneider (2019) presented in his paper about the usage of such technology in the cement manufacturing more feasible due to the availability of sufficient heat which requires capturing the CO2. Further, the separation of nitrogen from the combustion air which enters the cement kiln using oxyfuel technology results in the lesser thermal requirement, and a high concentration of CO2 and water vapour enable effective carbon capturing. Such process implementation requires industrial level trails to assess the complexities and further adjustments required in an existing cement manufacturing plant.