Abstract
The effect of CaO-MgCO3 additives on the combustion property of semi-coke (SC) was investigated using thermogravimetric analysis. Based on the experimental results, the addition of CaO (Ca/S = 2) on SC could reduce the ignition temperature (about 1.3 °C) and burnout temperature (about 0.99 °C). Besides, the additive of CaO on SC had significantly decreased the emissions of SO2 and NOx. However, the addition of 1 wt% MgCO3 on SC-CaO could promote the burning process and remarkably reduce the ignition temperature (about 10 °C) and burnout temperature (about 8.64 °C). Moreover, the smallest activation energy was available for the combustion of SC-CaO-1 wt% MgCO3. On the other hand, the addition of MgCO3 with different content (0.5 wt%, 1 wt%, 2 wt%, 4 wt%) on SC-CaO could enhance the pore size of CaO, promote the sulfur fixation performance. Comparing with other SC-CaO-MgCO3 samples, the addition of appropriate amount of MgCO3 (1 wt%) could effectively promote the catalytic desulfuration and denitrification of CaO. Therefore, CaO-1 wt% MgCO3 could effectively inhibit SO2 and NOx emission, which had great potential to be an efficient and clean method for the large-scale utilization of semi-coke.
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References
Cao X, Zhao W, Liu J, Sun J, Zhou J, Cen K (2009) A thermogravimetry investigation on the combustibility of coal slime water slurry. J China Coal Soc 34:1394–1399
Chen S, Yang R (1997) Unified mechanism of alkali and alkaline earth catalyzed gasification reaction of carbon by CO2 and H2O. Energy Fuels 11:421–427
Daood SS, Ord G, Wilkinson T, Nimmo W (2014) Investigation of the influence of metallic fuel improvers on coal combustion/pyrolysis. Energy Fuel 28:1515–1523
Douglas MW (1983) Mechanisms of the alkali metal catalyzed gasification of carbon. Fuel 62:170–175
Fu S, Song Q, Tang J, Yao Q (2014) Effect of CaO on the selective non-catalytic reduction deNOx process: Experimental and kinetic study. Chem Eng J 249:252–259
Gong X, Guo Z, Wang Z (2010) Variation on anthracite combustion efficiency with CeO2 and Fe2O3 addition by differential thermal analysis (DTA). Energy 35:506–511
Guo H, Xu Z, Tao J, Zhao Y, Ma X, Wang S (2020) The effect of incorporation Mg ions into the crystal lattice of CaO on the high temperature CO2 capture. J CO2 Util 37:335–345
Hayhurst AN, Lawrence AD (1996) The Effect of solid CaO on the production of NOx and N2O in fluidized bed combustors: Studies using pyridine as a prototypical nitrogenous fuel. Combust Flame 105:511–527
Hu J, Liu L, Cui M, Wang J (2013) Calcium-promoted catalytic activity of potassium carbonate for gasification of coal char: the synergistic effect unrelated to mineral matter in coal. Fuel 111:628–635
Katalambula H, Gupta R (2009) Low-grade coals: a review of some prospective upgrading technologies. Energy Fuel 23:3392–3405
Li X, Ma B, Xu L, Hu Z, Wang X (2006) Thermogravimetric analysis of the co-combustion of the blends with high ash coal and waste tyres. Thermochim Acta 441:79–83
Li P, Chyang C, Ni H (2018) An experimental study of the effect of nitrogen origin on the formation and reduction of NOx in fluidized-bed combustion. Energy 154:319–327
Lissianski VV, Zamansky VM, Maly PM (2001) Effect of metal-containing additives on NOx reduction in combustion and reburning. Combust Flame 125:1118–1127
Liu H, Gibbs BM (1998) The influence of limestone addition at different positions on gaseous emissions from a coal fired circulating fluidized bed combustor. Fuel 77:1569–1577
Liu J, Jiang X, Shen J, Zhang H (2014) Pyrolysis of superfine pulverized coal. Part 1. Mechanisms of methane formation. Energy Convers Manag 87:1027–1038
Ma B, Li X, Xu L, Wang K, Wang X (2006) Investigation on catalyzed combustion of high ash coal by thermogravimetric analysis. Thermochim Acta 445:19–22
Ouyang Z, Zhu J, Lu Q, Yao Y, Liu J (2014) The effect of limestone on SO2 and NOx emissions of pulverized coal combustion preheated by circulating fluidized bed. Fuel 120:116–121
Rui Y, Shen Y (2019) Catalytic pyrolysis of biomass-plastic wastes in the presence of MgO and MgCO3 for hydrocarbon-rich oils production. Bioresour Technol 293:122076
Sheng Y, Wang M, Hu Y, Kong J, Wang J, Chang L, Bao W (2019) Transformation and regulation of sulfur during pyrolysis of coal blend with high organic-sulfur fat coal. Fuel 249:427–433
Shi X, Guo R, Wang Z, Liu X, Qin H, Pan W, Wu G (2019) Effect of (NH4)2CO3 addition on the combustion behavior and NOx emission properties during semi-coke combustion process. Energy Source A 45:1–7
Song H, Liu G, Zhang J, Wu J (2017) Pyrolysis characteristics and kinetics of low rank coals by TG-FTIR method. Fuel Process Technol 156:454–460
Sowa JM, Fletcher TH (2011) Investigation of an iron-based additive on coal pyrolysis and char oxidation at high heating rates. Fuel Process Technol 92:2211–2218
Tomita A (2001) Catalysis of carbon-gas reactions. Catal Surv Jpn 5:17–24
Upadhyay DS, Khosla A, Chaudhary A, Patel RN (2019) Effect of catalyst to lignite ratio on the performance of a pilot scale fixed bed gasifier. Energy 189:116229
Wang P, Wang C, Du Y, Feng Q, Wang Z, Yao W, Liu J, Zhang J, Che D (2019) Experiments and simulation on co-combustion of semi-coke and coal in a full-Scale tangentially fired utility boiler. Energy Fuel 33:3012–3027
Wu X, Radovic LR (2005) Catalytic oxidation of carbon/carbon composite materials in the presence of potassium and calcium acetates. Carbon 43:333–344
Wu J, Wang B, Lou HH, Yang F, Cheng F (2016) Effects of CaO-K2CO3 on combustion behavior and emission properties of SO2 and NOx during coal sludge combustion. Asia-Pac J Chem Eng 11:735–742
Wu L, Tian Z, Qin W, Hu X, Dong C (2020) Understanding the effect of CaO on HCN conversion and NOx formation during the circulating fluidized combustion process using DFT calculations. Proc Combust Inst (in press)
Xie K, Li W, Zhao W (2010) Coal chemical industry and its sustainable development in China. Energy 35:4349–4355
Yao Y, Zhu J, Lu Q (2015) Experimental study on nitrogen transformation in combustion of pulverized semi-coke preheated in a circulating fluidized bed. Energy Fuel 29:3985–3991
Yuan M, Wang C, Zhao L, Wang P, Wang C, Che D (2020) Experimental and kinetics study of NO heterogeneous reduction by the blends of pyrolyzed and gasified semi-coke. Energy 207:118260
Zhang J, Wang C, Jia X, Wang P, Che D (2019) Experimental study on combustion and NO formation characteristics of semi-coke. Fuel 258:116108
Zhang H, Gong Z, Liu L, Wang Z, Li X (2020) Study on the migration characteristics of sulfur and nitrogen during combustion of oil sludge with CaO additive. Energy Fuel 34:6124–6135
Zhao Z, Li W, Li B (2002) Catalytic reduction of NO by coal chars loaded with Ca and Fe in various atmospheres. Fuel 81:1559–1564
Zheng S, Hu Y, Wang Z, Cheng X (2020) Experimental investigation on ignition and burnout characteristics of semi-coke and bituminous coal blends. J Energy Inst 93:1373–1381
Zijlma GJ, Jensen A, Johnsson JE, Van Den Bleek CM (2000) The influence of H2O and CO2 on the reactivity of limestone for the oxidation of NH3. Fuel 79:1449–1454
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This work was economically supported by the National Key R&D Program of China (2018YFB0605002).
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Wu, Gl., Guo, Rt., Liu, Yz. et al. Effects of CaO-MgCO3 on the combustion behavior and emission properties of SO2 and NOx during semi-coke combustion. Chem. Pap. 75, 2495–2501 (2021). https://doi.org/10.1007/s11696-021-01507-z
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DOI: https://doi.org/10.1007/s11696-021-01507-z