一种智能控制的整体式SCR催化剂非破坏性测试装置的研制及应用

doi:10.12052/gdutxb.160093

Abstract

Abstract:

Selective Catalytic Reduction (SCR）is the key technology for diesel effluent to meet today’s emission standards. The De NO_x efficiency is directly determined by the activities of the catalyst. In purpose of precisely and efficiently evaluating the activities of the catalysts, a device that is intelligently controlled by robots for evaluations of the activities of SCR catalytic ensembles is presented in this research. The device is using circulated hot air heating to maintain the temperature of the catalyst sample. By separating the reaction channels from the heating air, NO and Ammonia mixture is flowing through a small portion of the heated catalyst substrate while the NO concentration is monitored continuously. In this way, NO conversion rate and temperature curve is measured. Under the conditions of space speed 40 000 h^-1, NO initial concentration of 1.2 ‰, in the temperature range of 150 ℃ to 250 ℃, the conversation rates of a V₂O₅/WO₃/TiO₂ SCR catalytic ensemble sample are from 18% to 88%. The stability and intelligent level of the device are also tested by evaluating the SCR catalytic ensemble samples. The same sample is tested twice and the conversion curves are overlapped. For comparisons, the samples are also tested in a micro reactor and a diesel engine bench. Results attained in all these test fixtures are comparable. In addition, the cost of testing a sample on the device is only 1% of that when tested on a diesel engine bench. The intelligent device described in this research is a well-designed non-destructive test fixture. It is non-destructive, similar to a diesel engine bench, and is also very economical and easy to operate, similar to a micro reactor. The device can be used for daily operation of scale up experiments, as well as for products inspections.

Key words: Diesel exhaust, selective catalytic reduction, intelligent controlled device, V₂O₅-TiO₂ monolithic catalyst

CLC Number:

O643.3

Xiao Jian-ming, Zhao Xiang-yun, Yang Xiao-bo, Yu Lin, Fan Qun. An Intelligently Controlled Device for SCR Catalytic Ensemble Testing, Its Designs and Applications[J].Journal of Guangdong University of Technology, 2017, 34(04): 31-35.

References 16

[1] 国家环境保护部科技标准司. 中华人民共和国国家标准: GB 17691-2005[S]. 北京: 国家环境保护总局与国家质量监督检验检疫总局, 2005.
[2] DUMESIC J A, TOPSØE N, TOPSØE H, et al. Kinetics of selective catalytic reduction of Nitric Oxide by Ammonia over Vanadia/Titania [J]. Journal of Catalysis, 1996, 163: 409-417.
[3] GAN B, ZHAN R, LIN H, et al. Review of state of the art technologies of selective catalytic reduction of No_x from diesel engine exhaust [J]. Applied Thermal Engineering, 2014, 66: 395-414.
[4] MATSUMOTO S. Recent advances in automobile exhaust catalysts [J]. Catalysis Today, 2004, 90: 183-190.
[5] QIU T, LI X C, LIANG H, et al. A method for estimating the temperature downstream of the SCR (selective catalytic reduction) catalyst in diesel engines [J]. Energy, 2014, 68: 311-317.
[6] 国家环境保护部. 《关于实施第五阶段机动车排放标准》(公告2016年第4号)[S]. 北京: 环境保护部、工业和信息化部, 2016.
[7] 国家环境保护部科技标准司. 中华人民共和国国家环境保护标准: HJ451-2008[S]. 北京: 国家环境保护部, 2008.
[8] 符志伟, 程高, 林婷, 等. 二氧化锰制备及催化燃烧甲苯性能研究[J]. 广东工业大学学报, 2016, 33(02): 85-90.FU Z W, CHENG G, LIN T, et al. The preparation of MnO₂ and application in catalytic combustion of toluene [J]. Journal of Guangdong University of Technology, 2016, 33(02): 85-90.
[9] KASPAR J, FORNASIERO P, HICKEY N. Automotive catalytic converters: current status and some perspectives [J]. Catalysis Today, 2003, 77: 419-449.
[10] LONG Q, YANG R T. Selective catalytic reduction of NO with ammonia over V₂O₅ doped TiO₂ pillared clay catalysts [J]. Applied Catalysis B: Environmental, 2000, 24: 13-21.
[11] CHOI C, SUNG Y, CHOI G M, et al. Numerical analysis of NO_x reduction for compact design in marine urea-SCR system [J]. International Journal of Naval Architecture and Ocean Engineering, 2015, 7: 1020-1034.
[12] KIM J Y, KIM Y H, HAN S, et al. Photocatalytic synthesis of oxygenated hydrocarbons from diesel fuel for mobile DeNO_x application [J]. Journal of Catalysis, 2013, 302: 58-66.
[13] KANTCHEVA M. Identification, stability, and reactivity of NO_x species adsorbed on titania-supported manganese catalysts[J]. Journal of Catalysis, 2001, 204: 479-494.
[14] CHOI B C, KIM Y K, JHUNG W N, et al. Experimental investigation on melting characteristics of frozen urea-water-solutions for a diesel SCR de-NO_x-system [J]. Applied Thermal Engineering, 2013, 50: 1235-1245.
[15] 郑育英, 邓淑华, 黄慧民, 等. 汽车尾气净化催化剂的研究进展[J]. 广东工业大学学报, 2004, 21(3): 28-33.ZHENG Y Y, DENG S H, HUANG H M, et al. Research and development of automobile exhaust purifying catalyst [J]. Journal of Guangdong University of Technology, 2004, 21(3): 28-33.
[16] NOVA S, LIETTI L, TRONCONI E, et al. Dynamics of SCR reaction over a TiO₂-supported vanadia-tungsta commercial catalyst [J]. Catalysis Today, 2000, 60: 73-82.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

Comments

Recommended 0

No Suggested Reading articles found!

An Intelligently Controlled Device for SCR Catalytic Ensemble Testing, Its Designs and Applications

HTML

PDF (PC)

Abstract

Cite this article

share this article

References 16

Related Articles 2

Metrics

Comments

Recommended 0

[1]	Cao Yi-ting, Wang Qiao, Xu Ze-tao, Lyu Guan-heng. Research Progress of MOF/Bismuth-based Semiconductor Composites in Photocatalytic Technology [J]. Journal of Guangdong University of Technology, 2022, 39(04): 113-120.
[2]	Hu Lu-guo, Hu Zheng-fa, Xiao Yang, Wang Yin-hai, Zhao Hui. A Study of the Modification of Nano-CuO Photocatalyst by Ethanol Quenching [J]. Journal of Guangdong University of Technology, 2020, 37(04): 84-90.