Investigation on Cu-based oxygen carrier for chemical looping combustion of combustible solid waste
-
摘要: 采用机械混合法制备了铜基载氧体,利用两段式管式炉反应平台和磁悬浮热重分析仪分别研究了铜基载氧体与石墨、可燃固体废弃物典型组分及可燃固体废弃物热解气模型物CH4的化学链燃烧特性。结果表明,机械混合法制备的Cu80Si950载氧体强度高,具有良好的转化率和循环稳定性,是实现可燃固体废弃物化学链燃烧的一种比较理想的载氧体。利用扫描电镜(SEM)、X射线衍射仪(XRD)和颗粒强度测定仪对各个反应阶段载氧体进行分析。结果表明,Cu80Si950载氧体参与反应后表面结构发生巨大改变,机械强度骤降。多次循环之后载氧体结构趋于规则均匀化,形成类似球棒形状的大孔隙率结构,强度保持不变,使得载氧体在长时间使用过程中反应性能得以维持。Abstract: A Cu-based oxygen carrier Cu80Si950 was prepared by mechanical mixing, and the chemical looping combustion (CLC) of graphite, combustible solid waste(CSW) and model compound CH4 with Cu80Si950 oxygen carrier was studied in a two-stage tubular furnace reaction platform and a thermo-gravimetric analyzer (TGA), respectively. The experimental results prove that the Cu80Si950 oxygen carrier has a high mechanical strength, excellent reaction and recycle stability, which makes it a promising oxygen carrier for CLC process of CSW. Scanning electron microscope (SEM), X-ray diffraction (XRD) and strength analyzer have been used to characterize the oxygen carrier of each reaction stages. The results show that the morphology of Cu80Si950 oxygen carrier changes and the crushing strength dereases dramatically after CLC process. However, the Cu80Si950 oxygen carrier after experiencing several loops displays a trend of structural regularization with porous structure on the surface, which keeps the oxygen carrier a constant crushing strength and a greater durability.
-
Key words:
- chemical looping combustion /
- combustible solid waste /
- oxygen carrier /
- conversion
-
常超, 王铁山. 垃圾处理的国际比较与借鉴[J]. 城市问题, 2009, (1): 77-81. (CHANG Chao, WANG Tie-shan. International comparison and reference of the garbage treatment[J]. Urban Problems, 2009, (1): 77-81.) 李新国, 李丽梅, 周欣, 陈志豪, 张于峰. 垃圾混合物和废塑料热解的实验研究[J]. 煤气与热力, 2005, 25(7): 9-11. (LI Xin-guo, LI Li-mei, ZHOU Xin, CHEN Zhi-hao, ZHANG Yu-feng. Experimental study on pyrolysis of garbage mixture and waste plastic[J]. GAS & HEAT, 2005, 25(7): 9-11.) CHEN G, ANDRIESA J, LUO Z, SPLIETHOFF H. Biomass pyrolysis/gasification for product gas production: The overall investigation of parametric effects[J]. Energy Convers Manage, 2003, 44(11): 1875-1884. SONG Y Y. Study of thermolysis of organic solid wastes in cities[J]. Environ Sci Technol, 1992, 3: 9-13. 柯威, 熊伟, 刘景雪, 韦刘柯, 周力, 鲍秀婷, 向晶晶, 郭嘉. 城市固体废弃物热重分析及热解动力学研究[J]. 可再生能源, 2006, (129): 53-56. (KE Wei, XIONG Wei, LIU Jing- xue, WEI Liu- ke, ZHOU Li, BAO Xiu- ting, XIANG Jing- jing, GUO Jia. Thermogravimetric analysis and pyrolytic kinetic study on municipal solid wastes (MSW)[J]. Renewable Energy, 2006, (129): 53-56.) NOORMAN S, ANNALAND M V, KUIPERS H. Packed bed reactor technology for chemical-looping combustion[J]. Ind Eng Chem Res, 2007, 46(12): 4212-4220. JOHANSSON M, MATTISSON T, LYNGFELT A, ABAD A. Using continuous and pulse experiments to compare two promising nickel-based oxygen carriers for use in chemical-looping technologies[J]. Fuel, 2008, 87(6): 988-1001. BERGUERAND 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, 87(12): 2713-2726. 卢玲玲, 王树众, 姜峰, 胡昕. 化学链燃烧技术的研究现状及进展[J]. 现代化工, 2007, 27(8): 17-22. (LU Ling-ling, WANG Shu-zhong, JIANG Feng, HU Xin. Research status and advances in chemical-looping combustion[J]. Modern Chemical Industry, 2007, 27(8): 17-22.) CAO Y, CASENAS B, PAN W P. Investigation of chemical looping combustion by solid fuels. 2. Redox reaction kinetics and product characterization with coal,biomass, and solid waste as solid fuels and CuO as an oxygen carrier[J]. Energy Fuels, 2006, 20(5): 1845-1854. CAO Y, PAN W P. Investigation of chemical looping combustion by solid fuels. 1. Process analysis[J]. Energy Fuels, 2006, 20(5): 1836-1844. 何方, 李海滨, 赵增立, 陈勇, 李常河, 王小波. 一种可燃固体废弃物化学链气化制合成气的方法及串行流化床反应器: 中国, 200910042076.X[P]. 2010-2-3. (HE Fang, LI Hai-bin, ZHAO Zeng-li, CHEN Yong, LI Chang-he, WANG Xiao-bo. A synthesis gas generation method by chemical looping gasification of combustible solid waste and an interconnected fluidized bed reactor: CN, 200910042076.X[P]. 2010-2-3.) HOTEIT A, CHANDEL M K, DURECU S, DELEBARRE A. Biogas combustion in a chemical looping fluidized bed reactor[J]. Int J Greenhouse Gas Control, 2009, 3(5): 561-567. LEA-LANGTON A, ZIN R M, DUPONT V, TWIGG M V. Biomass pyrolysis oils for hydrogen production using chemical looping reforming[J]. Int J Hydrogen Energy, 2012, 37(2): 2037-2043. 王志奇, 陈 勇. 垃圾衍生燃料等温快速热解和燃烧反应特性[J]. 燃料化学学报, 2004, 32(4): 440-445. (Wang Zhi-qi, Chen Yong. Pyrolysis and combustion characteristics of RDF at isothermal condition[J]. Journal of Fuel Chemistry and Technology, 2004, 32(4): 440-445.) DE DIEGO L F, GARCIA-LABIANO F, ADANEZ J, GAYAN P, ABAD A, CORBELLA B M, PALACIOS J M.Development of Cu-based oxygen carriers for chemical-looping combustion [J]. Fuels, 2004, 83(13): 1749-1757.
点击查看大图
计量
- 文章访问数: 1513
- HTML全文浏览量: 40
- PDF下载量: 594
- 被引次数: 0