基于赤铁矿的生物质化学链燃烧过程中氮氧化物的释放特性

肖申; 沈来宏; 肖军; 牛欣; 顾海明; 宋涛

基于赤铁矿的生物质化学链燃烧过程中氮氧化物的释放特性

东南大学能源热转换及其过程测控教育部重点实验室, 江苏南京 210096

基金项目: 国家自然科学基金(51276037,51476029,51406035)。

详细信息

通讯作者:
沈来宏(1965-), 男, 教授, 主要研究方向为洁净煤燃烧、生物质能利用, E-mail:lhshen@seu.edu.cn, Tel:025-83795598, Fax:025-57714489。

中图分类号: TK6
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出版历程
- 收稿日期: 2014-10-28
- 刊出日期: 2015-04-30

NO_x release in chemical looping combustion of biomass based on hematite

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China

摘要

摘要: 在单批次进料固定床上,基于赤铁矿载氧体,研究了还原反应阶段反应温度和水蒸气量对谷壳的氮氧化物释放特性的影响。研究表明,碳转化率随反应温度升高而增加,但随水蒸气量呈先增加后下降,并在水蒸气量为1.0 g/min时达到最大值。在实验条件下,还原阶段未检测到NO₂。随着反应温度由750 ℃升高到900 ℃,NO的生成率增加,而N₂O的生成率先增加后降低,在850 ℃时达到最大值。水蒸气量由0.5 g/min升高到2.0 g/min,N₂O和NO的生成率均增加,且NO增加速率高于N₂O。在反应后的载氧体中,检测到KAlSi₃O₈存在,表明载氧体与生物质中的K元素发生反应。
- 化学链燃烧 /
- 生物质 /
- 赤铁矿 /
- 氮氧化物
Abstract: Nitrogen emission during chemical looping combustion (CLC) of rice husk based on hematite in a batch fixed bed reactor was studied. Different variables affecting the process, such as reduction temperature and steam content, were tested. The results show that higher reduction temperature results in a higher carbon conversion which reaches the highest value when the steam flow is 1.0 g/min. Furthermore, there are no NO₂ detected at all experiments. The rise of reduction temperature from 750 to 900 ℃ could contribute to the rise of NO, whereas the concentration of N₂O reaches the highest value at 850 ℃. Both N₂O and NO increase remarkably with the increase of steam flow. Nevertheless, the increasing rate of NO is faster than that of N₂O. Besides, KAlSi₃O₈ is detectable in the reduced oxygen carrier, attributing to the reaction of K in biomass with hematite.
- chemical looping combustion /
- biomass /
- hematite /
- NO_x

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参考文献(30)

BERGUER N, LYNGFELT A. Design and operation of a 10 kW_th chemical-looping combustor for solid fuels-Testing with south African coal[J]. Fuel, 2008, 872(12):2731-2726.

LEION H, LYNGFELT A. JOHHANSSON M, JERNDAL E. MATTISSON T. The use of ilmenite as an oxygen carrier in chemical-looping combustion[J]. Chem Eng Res Des, 2008, 86(9):1017-1026.

BERGUER N, LYNGFELT A. The use of petroleum coke as fuel in a 10 kW_th chemical-looping combustor[J]. Int J Greenhouse Gas Control, 2008, 2(2):169-179.

MATTISSON T, LYNGFELT A, CHO P. The use of iron oxide as an oxygen carrier in chemical-looping combustion of methane with inherent separation of CO₂[J]. Fuel, 2001, 80(13):1953-1962.

LEION H, MATTISSON T, LYNGFELT A. Solid fuels in chemical-looping combustion[J]. Int J Greenhouse Gas Control, 2008, 2(2):180-193.

SHEN L H, WU J H, XIAO J. Experiment on chemical looping combustion of coal with NiO based oxygen carrier[J]. Combust Flame, 2009, 156(3):721-728.

MENDIARA T, ABAD A, DE DIEGO L F, GARCÍA-LABIANO F, GAYN P, ADNEZ J. Biomass combustion in a CLC system using an iron ore as an oxygen carrier[J]. Int J Greenhouse Gas Control, 2013, 11(19):322-330.

GU H M, SHEN L H, ZHONG Z P, NIU X, GE H J, ZHOU Y F, XIAO S, JIANG S X. NO release during chemical looping combustion with iron ore as an oxygen carrier[J]. Chem Eng J, 2015, 264:211-220.

SONG T, SHEN L H, XIAO J, CHEN D Q, GU H M, ZHANG S W. Nitrogen transfer of fuel-N in chemical looping combustion[J]. Combust Flame, 2012, 159(3):1286-1295.

SUNG R S, SANG D K. Chemical-looping combustion with NiO and Fe₂O₃ in a thermobalance and circulating fluidized bed reactor with double loops[J]. Ind Eng Chem Res, 2006, 45(8):2689-2696.

吴家桦, 沈来宏, 肖军, 王雷, 郝建刚. 10 kW_th 级串行流化床木屑化学链燃烧试验[J]. 化工学报, 2009, 60(8):2080-2088. (WU Jia-hua, SHEN Lai-hong, XIAO Jun, WANG Lei, HAO Jian-gang.Experiments on chemical looping combustion of sawdust in a 10 kWth interconnected fluidized bed[J]. J Chem Ind Eng, 2009, 60(8):2080-2088.)

SHEN L H, WU J H, XIAO J, WANG L, HAO J G. Chemical-looping combustion of biomass in a 10 kWth reactor with iron oxide as an oxygen carrier[J]. Energy Fuels, 2009, 23(5):2498-2505.

苟进胜, 常建民, 任学勇. 生物质热解过程中氮元素迁移规律研究进展[J]. 科技导报, 2012, (14):70-74. (GOU Jin-sheng, CHANG Jian-min, REN Xue-yong. A review on the release characterization of nitrogen speicies during biomass pyrolysis[J]. Sci Technol Rev, 2012, (14):70-74.)

ABELHA P, GULYURTLU, CABRITA I. Release of nitrogen precursors from coal and biomass residuces in a bubbling fluidized bed[J]. Energy Fuels, 2008, 22(1):363-371.

黄振, 何方, 李新爱, 赵坤, 李海滨, 赵增立. Fe₂O₃-水蒸气生物质化学链共气化制合成气[J]. 太阳能学报, 2013, 34(12):2056-2062. (HUANG Zhen, HE Fang, LI Xin-ai, ZHAO Kun, LI Hai-bin, ZHAO Zeng-li. Syngas generated by chemical-looping gasification of biomass using Fe₂O₃ as oxygen carrier in presence of steam[J]. Acta Energy Sol Sin, 2013, 34(12):2056-2062.)

KELLER M, LEION H, MATTISSON T, LYNGFELT A. Gasification inhibition in chemical-looping combustion with solid fuels[J]. Combust Flame, 2011, 158(3):393-400.

GU H, SHEN L, XIAO J, ZHANG S, SONG T, Chemical looping combustion of biornass/coal with natural iron ore oxygen carrier in a continuous reactor[J]. Energy Fuels, 20l1, 5(1):446-455.

郝建刚, 吴家桦, 王雷, 沈来宏, 肖军. 基于Fe基载氧体的生物质化学链燃烧试验研究[J]. 锅炉技术, 2010, (2):65-70. (HAO Jian-gang, WU Jia-hua, WANG Lei, SHEN Lai-hong, XIAO Jun. Experiments on chemical looping combustion of biomass with a Fe₂O₃ based oxygen carrier[J]. Boiler Technol, 2010, (2):65-70.)

LEION H, MATTISSON T, LYNGFELT A. Solid fuels in chemical-looping combustion[J]. Int J Greenhouse Gas Control, 2008, 2(2):180-193.

LEION H, MATTISSON T, LYNGFELT A. The use of petroleum coke as fuel in chemical-looping combustion[J]. Fuel, 2007, 86(12/13):1947-1958.

柏继松. 生物质燃烧过程氮和硫的迁移、转化特性研究[D]. 浙江:浙江大学, 2012. (BO Ji-song. Nitrogen and sulfur conversion mechanism during biomass combustion[D]. Zhejiang:Zhejiang University, 2012.)

ZHOU H, JENSEN A D, GLARBORG P, KAVALIAUSKAS A. Formation and reduction of nitric oxide in fixed-bed combustion of straw[J]. Fuel, 2006, 85(5/6):705-716.

WERTHER J, OGAD T. Sewage sludge combustion[J]. Prog Energy Combust Sci, 1999, 25(1):55-116.

PRAKASH P K, SHEEBA NARAYANAN. Hydrogen production from steam gasification of biomass influence of process parameters on hydrogen yield-A review[J]. Renew Energy, 2014, 66:570-579.

常丽萍. 煤热解、气化过程中含氮化合物的生成与释放研究[D]. 太原:太原理工大学, 2004. (CHANG Li-ping. Study on the formation and release of nitrogen-containing compounds during coal pyrolysis and gasification[D]. Taiyuan:Taiyuan University of Technology, 2004.)

FURIMSKY E, OHTSUKA Y. Formation of nitrogen-containing compounds during slow pyrolysis and oxidation of petroleum coke[J]. Energy Fuels, 1997, 11(5):1073-1080.

JOHNSSON J E. Formation and reduction of nitrogen oxides in fluided-bed combustion[J]. Fuel, 1994, 73(9):1398-1415.

GLARBORG P, JENSEN A D, JOHNSSON J E. Fuel nitrogen conversion in solid fuel fired systems[J]. Prog Energy Combust Sci, 2003, 29(2):89-113.

黄容, 高瑗, 高明, 廖燕妮, 陈佳烨. 生物质灰渣物质特性和保水性的研究[J]. 水土保持学报, 2013, (6):130-133. (HUANG Rong, GAO Yuan, GAO Ming, LIAO Yan-ni, CHEN Jia-ye. Study on material properties and water absorption capacity of biomass ash[J]. J Soil Water Conserv, 2013, (6):130-133.)

肖瑞瑞, 陈雪莉, 王辅臣, 于广锁. 不同生物质灰的理化特性[J]. 太阳能学报, 2011, (3):364-369. (XIAO Rui-rui, CHEN Xue-li, WANG Fu-chen, YU Guang-suo. The physicochemical properties of different biomass ash[J]. Acta Energy Sol Sin, 2011, (3):364-369.)

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