歐建斌 王家明 翁端
摘 要:1)以汽油車尾氣排放的污染物為研究對(duì)象,在汽油車超低排放凈化技術(shù)方面,圍繞國4以上排放標(biāo)準(zhǔn)的技術(shù)需求,開發(fā)高耐熱性汽油車密耦催化劑,使催化劑能夠低溫快速起燃,明顯改善催化性能,達(dá)到削減冷啟動(dòng)排放的目的;開發(fā)寬空燃比窗口的三效催化凈化技術(shù),明顯提高催化劑儲(chǔ)放氧的能力與速度;集成汽油機(jī)密耦催化劑、寬空燃比窗口的三效催化劑與其它污染物凈化技術(shù)產(chǎn)品,提高產(chǎn)品的一致性,實(shí)現(xiàn)5~8個(gè)車型配套,實(shí)現(xiàn)5輛以上汽油車的示范運(yùn)行。 技術(shù)指標(biāo): (1)汽油車排放凈化效果滿足國4以上排放標(biāo)準(zhǔn); (2)凈化器壽命達(dá)到12~16萬公里; (3)實(shí)現(xiàn)5~8個(gè)車型配套; (4)建成年產(chǎn)300萬套生產(chǎn)能力的凈化器生產(chǎn)線; (5)實(shí)現(xiàn)5輛以上汽油車的示范運(yùn)行; 2)所開展的主要工作和主要技術(shù)成果包括: 根據(jù)汽油車污染物冷啟動(dòng)排放特點(diǎn),借助耐高溫儲(chǔ)氧材料與高溫氧化鋁載體,開發(fā)了高活性、耐高溫的HC起燃催化劑。從優(yōu)化綜合性能和降低成本出發(fā),重點(diǎn)研究全Pd催化劑,以鈰鋯儲(chǔ)氧材料改性氧化鋁載體,采用溶膠凝膠法,在堇青石陶瓷載體上原位制備了Pd/CeO2-ZrO2/Al2O3催化劑。所研制的整體式低溫HC催化劑,新鮮和硫老化樣對(duì)C3H8/C3H6的T50分別達(dá)到210°C和314°C,能夠滿足國4排放標(biāo)準(zhǔn)對(duì)催化劑的需求。 2)根據(jù)汽油車污染物排放特點(diǎn),開發(fā)了寬空燃比三效催化劑。以過渡金屬M(fèi)n、Fe、Co、Ni和Cu摻雜鈰鋯樣品作為研究體系,以動(dòng)態(tài)儲(chǔ)放氧性能、動(dòng)態(tài)空燃比窗口特性,水煤氣變換及水蒸汽重整反應(yīng)活性評(píng)價(jià)作為研究手段,研究了引入第三組元后對(duì)樣品結(jié)構(gòu)及催化性能的影響規(guī)律。
關(guān)鍵詞:尾氣;環(huán)境;環(huán)保
Gasoline vehicle ultra low emission purification technology acceptance report
Abstract:The main work carried out by the 2 and main technical results include: 1 according to the gasoline engine cold start emission characteristics of pollutants, with the aid of high temperature oxygen storage materials with high temperature alumina carrier, the development of high activity, high temperature resistant HC combustion catalyst. From the optimization of comprehensive performance and reduce the cost of the whole Pd, focuses on the study of catalyst, alumina carrier modified with cerium zirconium oxygen storage material, sol-gel, on cordierite ceramic carrier in situ prepared Pd/CeO2-ZrO2/Al2O3 catalyst. Monolithic catalysts for low-temperature HC developed, fresh and sulfur aging on C3H8/C3H6 T50 to 210 ° C and 314 ° C, 4 emission standard can meet the demand of the catalyst. 2 according to the emission characteristics of gasoline vehicle pollutants, wide air fuel ratio three effect catalyst development. Transition metal Mn, Fe, Co, Ni and Cu doped ceria zirconia samples as the research system, fuel ratio window characteristics with dynamic oxygen storage properties, dynamic air, water gas shift and steam reforming reaction activity evaluation as the research methods, the influence on the sample structure and catalytic properties of the introducing third yuan.
Key words:Exhaust; environment; environmental protection
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