Simulations and process analysis of the carbonation–calcination reaction process with intermediate hydration

Wang, William Yang; Ramkumar, Shwetha; Wong, Danny; Fan, Liang‐Shih

doi:10.1016/j.fuel.2011.06.059

Cited by 61 publications

(75 citation statements)

References 36 publications

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“…8), flue gas composition, and CFPP operation parameters are extracted from Ref. . In this plant, combustion of 205 tons per hour of coal takes place in the steam boiler to generate 1335.7 MW th , which releases to the atmosphere 2517 t h − of flue gas with a CO 2 molar fraction of 0.135.…”

Section: Cal–cfpp Integration Modelmentioning

confidence: 99%

Energy Consumption for CO₂ Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag

Ortíz

Chacartegui

2016

Energy Tech

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The calcium looping (CaL) process, based upon the dry carbonation/calcination of CaO/CaCO3, is at the center of a potentially low‐cost, second‐generation technology for CO2 capture. This manuscript analyzes the energy penalty that arises from the integration of the CaL process into a coal‐fired power plant using cheap and abundantly available CaO precursors such as natural limestone, dolomite, and steel slag. Experimental results on their multicycle capture capacity behavior obtained from thermogravimetric analysis (TGA) at realistic CaL conditions for CO2 capture are used to this end. This work shows that the specific energy consumption for CO2 avoided (SPECCA) is reduced by using either dolomite or steel slag, whose carbonation kinetics in the diffusive phase are accelerated as compared to limestone. Thus, the use of dolomite as CaO precursor would yield a low SPECCA value of approximately 2 MJ kg−1 CO2 for a residence time of the solids in the carbonator of approximately 10 minutes, which is clearly below the SPECCA value usually reported for conventional amine‐based CO2 capture systems.

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Section: Cal–cfpp Integration Modelmentioning

confidence: 99%

Energy Consumption for CO₂ Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag

Ortíz

Chacartegui

2016

Energy Tech

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“…Flue gases from coal-fired power plants generally contain a mole fraction of CO 2 in the range of 10-15% [6,7], whereas typical residence times in the carbonator reactor would be on the order of minutes. Taking into account these constraints, optimum carbonation temperatures are around 650°C for a quick enough reaction kinetics and low value of the equilibrium CO 2 concentration in order to achieve significant efficiencies of CO 2 capture (around 15 80-90%) [8].…”

Section: Introductionmentioning

confidence: 99%

A new model of the carbonator reactor in the calcium looping technology for post-combustion CO2 capture

Ortíz

Chacartegui

Becerra

et al. 2015

Fuel

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“…Laboratory experiments first provided proof‐of‐concept results, understanding of reaction mechanism, and investigation of sorbent performances . Process simulation, reactor modeling, and economic analysis helped to show the potential of the process and its feasibility. Several pilot plants have been constructed with capacities ranging from 75 kW th up to 1.7 MW th ; the latter treated a fraction of the flue gas from an existing 50 MW e circulating fluidized‐bed combustion (CFBC) power plant .…”

Section: Introductionmentioning

confidence: 99%

Combined Calcium Looping and Chemical Looping Combustion for Post‐Combustion Carbon Dioxide Capture: Process Simulation and Sensitivity Analysis

Duhoux

Mehrani

et al. 2016

Energy Tech

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In this work, a combined calcium looping and chemical looping combustion (CaL–CLC) technology is simulated at thermodynamic equilibrium conditions and the results in terms of efficiency, power production, and solids circulation rates are compared with the case of using CaL alone. In addition, a new solids looping configuration in the CaL–CLC process is proposed with the purpose of mitigating the loss of calcium oxide conversion after high cycle numbers. Simulations show an improved process efficiency of the CaL–CLC method compared with CaL alone (34.2 vs. 31.2 % higher heat value) and an increased power output (136 vs. 110 MWe additional power) due to the higher energy requirement to preheat the reactants. A sensitivity analysis of the process operating parameters highlights the particular importance of the temperature difference between reactors, which has a strong impact on the required mass of solids circulating in the loops. Finally, partial carbon dioxide capture scenarios are considered and indicate that lower capture levels are suitable to match regulation targets.

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Simulations and process analysis of the carbonation–calcination reaction process with intermediate hydration

Cited by 61 publications

References 36 publications

Energy Consumption for CO₂ Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag

Energy Consumption for CO₂ Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag

A new model of the carbonator reactor in the calcium looping technology for post-combustion CO2 capture

Combined Calcium Looping and Chemical Looping Combustion for Post‐Combustion Carbon Dioxide Capture: Process Simulation and Sensitivity Analysis

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Simulations and process analysis of the carbonation–calcination reaction process with intermediate hydration

Cited by 61 publications

References 36 publications

Energy Consumption for CO2 Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag

Energy Consumption for CO2 Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag

A new model of the carbonator reactor in the calcium looping technology for post-combustion CO2 capture

Combined Calcium Looping and Chemical Looping Combustion for Post‐Combustion Carbon Dioxide Capture: Process Simulation and Sensitivity Analysis

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Energy Consumption for CO₂ Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag

Energy Consumption for CO₂ Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag