船用柴油机SCR催化剂性能测试分析  

Application of selective reduction catalyst to marine diesel engine

作　　者：杨智远[1] 江国和[1] 张旭升[1] 魏海军[1] 姜小鑫 YANG Zhiyuan;JIANG Guohe;ZHANG Xusheng;WEI Haijun;JIANG Xiaoxin(School of Merchant Ship, Shanghai Maritime University, Shanghai 201306, China;Shanghai 711 Research Institute, Shanghai 200090, China)

机构地区：[1]上海海事大学商船学院,上海201306 [2]上海711研究所,上海200090

出　　处：《哈尔滨工程大学学报》2017年第10期1539-1544,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51309149)

摘　　要：为评定V_2O_5/TiO_2催化剂在船舶低速电喷柴油机SCR(selective catalytic reduction)系统的适用性与经济性,本文基于D-1000-5电动振动台和康明斯ISDe4-SCR性能试验台架,分别对国内生产的A、B、C三组V_2O_5/TiO_2催化剂小样进行活性和抗振性实验,最终选定催化剂B为船用中速机SCR目标催化剂,并在6CS21/32大功率船用中速机试验台上对目标催化剂B进行D2、E3循环测试。台架测试结果表明:国产V_2O_5/TiO_2催化剂的经济性较进口催化剂略有提高,中高排气温度下脱硝率可达90%、较低排气温度下活性各有差异;排气温度高于250℃时,催化剂B的脱硝率稳定在80%以上,可进一步研究其船用低速机SCR系统的特性;催化剂C的活性和机械强度满足船用中速机SCR要求,温度低于250℃时,转化效率急剧降低,但其价格低,具有较强的船用中速机市场竞争力;催化剂A温度窗较窄,仅适用于排气温度高于330℃的发动机上;催化剂封装可提高催化剂抗振动冲击能力。To assess the applicability and economical efficiency of VEOJTiO2 catalyst in a marine low-speed electronic- injection diesel engine selective catalytic reduction （SCR） system, a D-1000-5 electric vibration table and a Cummins ISDe4-SCR performance test bench were used to test the activity and vibration resistance of homemade A, B, C group of VEOs/TiO2 catalyst sample. Catalyst B was selected as the SCR target catalyst for marine medium-speed diesel engine. D2 and E3 cyclic tests were performed for the target catalyst B in the test bench of 6CS21/32 large-power marine diesel engine. Bench test results show that the economical efficiency of the homemade V2O5/TiO2 catalyst is slightly higher than that of the imported catalyst. At a medium-high exhaust temperature, the denitration rate can reach 90% ; at a low exhaust temperature, the activities vary. When the exhaust temperature is higher than 250℃, the denitration rate of catalyst B is more than 80%. The properties of the SCR system for a marine low-speed diesel engine can be further re- searched. The activity and mechanical strength of catalyst C meet the SCR requirements of a marine medium-speed diesel engine. When the temperature is lower than 250℃, the conversion efficiency decreases quickly. However, due to low cost, the system is quite competitive in the market of marine medium-speed diesel engines. The temperature scope of catalyst A is narrow and is applicable only for the engine with an exhaust temperature above 330 ℃. Catalyst packaging can improve the vibration resistance of the catalyst.

关 键 词：V2O5/TIO2催化剂 活性 抗振性 NOX排放 台架试验 温度窗 适用性 

分 类 号：U668.5[交通运输工程—船舶及航道工程] X511[交通运输工程—船舶与海洋工程]