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| 1 | The balance of acidity and redox capability over modified CeO_2 catalyst for the selective catalytic reduction of NO with NH_3显示文摘The effect of acidity and redox capability over sulfuric acid-modified CeO_2 catalysts were studied for the selective catalytic reduction of NO_x with NH_3(NH_3-SCR). The deposition of sulfate significantly enhanced the catalytic performance over CeO_2. NO_x conversion over4H_2SO_4/CeO_2 at 230–440 °C was higher than 90%. The strong redox capability of CeO_2 could result in unselective NH_3 oxidation and decrease high temperatures catalytic activity and N_2 selectivity. The deposition of sulfate increased the acidity and weakened the redox capability, and then increased the high temperature NO_x conversion and N_2 selectivity. An appropriate level of acidity also promoted the activity at 190–250 °C over ceria-based catalysts, and with further increase in the acidity, the SCR activity decreased slightly. Weak redox capability lowered the low-temperature catalytic activity. Excellent SCR activity requires a balance of acidity and redox capability on the catalysts. | Zhihua Lian Wenpo Shan Meng Wang Hong He Qingcai Feng | 2019 | Journal of Environmental Sciences2019，31，5： | 6 |
| 2 | 铌元素改性V_(2)O_(5)-WO3/TiO_(2)催化剂降低脱硝过程SO_(2)的氧化率显示文摘本文采用浸渍法制备了Nb改性的V_(2)O_(5)-WO_(3)/TiO_(2)催化剂,研究了脱硝反应中Nb负载量对催化剂SO_(2)氧化活性的影响。结果表明,在350℃下,Nb_(2)O_(5)负载量为2%的Nb_(2)O_(5)-V_(2)O_(5)-WO_(3)/TiO_(2)催化剂上的SO_(2)氧化率最低(0.6%),而同时NO_(x)的转化率仍能达到95%。采用TGA、氮吸附、XRD、H_(2)-TPR、CO_(2)-TPD、XPS和in-situ DRIFTS等对催化剂进行了表征分析,结果显示,Nb改性后V_(2)O_(5)-WO_(3)/TiO_(2)催化剂的晶体结构没有发生明显改变,但是其比表面积小幅度下降,有助于减少对SO_(2)的吸附;同时,改性后催化剂表面的吸附氧含量下降,氧化还原性能也稍微减弱,这有利于降低其对SO_(2)的氧化活性。in-situ DRIFTS结果表明,Nb改性后的Nb-V_(2)O_(5)-WO_(3)/TiO_(2)催化剂反应过程中表面中间产物VOSO4的含量明显下降,从而减少了SO_(3)的生成量。 | 王博 边瑶 封硕 王少奇 沈伯雄 | 2022 | 燃料化学学报2022，50，4： | 6 |
| 3 | Nd掺杂V_2O_5/TiO_2低温NH_3选择性催化还原NO_x性能研究显示文摘采用溶胶凝胶法和浸渍法制备了Nd掺杂V_2O_5/TiO_2催化剂.用XRD和Raman技术对其晶相结构和分散性进行了表征,并在固定床反应器上评价了其催化活性.然后考察了煅烧温度对催化剂脱硝性能的影响,结合XRD表征结果可知煅烧温度没有改变TiO_2的晶型,只影响了其结晶度.同时氮气吸脱附表征及BET计算结果显示350℃煅烧时催化剂比表面积最大.研究了O_2浓度以及氨氮比对催化剂脱硝性能的影响.同时考察了Nd掺杂催化剂的稳定性,发现Nd改性催化剂有较好的稳定性.并对Nd掺杂催化剂做了抗硫抗水考察,研究结果表明, Nd掺杂催化剂有较好的耐硫耐水性. | 窦生平 赵炜 张凯 李昌烽 | 2019 | 分子催化2019，33，1： | 5 |
| 4 | In_(2)O_(3)对工业V_(2)O_(5)-MoO_(3)/TiO_(2)脱硝催化剂性能的影响显示文摘采用浸渍法制备了V2O5-MoO3-In2O3/TiO2脱硝催化剂,通过XRD、N2-吸附脱附、H2-TPR、NH3-TPD、O2-TPD等技术表征了催化剂的物化性能,通过固定床反应器考察了催化剂的脱硝性能。表征结果表明,In2O3的负载使V2O5-MoO3/TiO2催化剂的比表面积和孔体积略有降低、孔径略有提升,但没有改变V2O5-MoO3/TiO2催化剂的晶型结构及载体的孔道结构。催化剂的脱硝性能评价实验结果显示,In2O3的负载提升了催化剂的还原性能,增强了催化剂的表面酸性,从而提高了催化剂的脱硝活性。In2O3的存在提高了催化剂的抗SO2/H2O蒸气的性能,催化剂的高温抗SO2/H2O蒸气性能优于低温状态下。 | 纵宇浩 常峥峰 黄力 王虎 刘洋 李金珂 | 2021 | 化工环保2021，41，3： | 3 |
| 5 | 低温脱硝催化剂抗硫性能研究显示文摘低温脱硝催化剂工业应用的瓶颈问题是抗硫性差。本文对催化剂低温抗硫脱硝性能的影响因素进行了归纳总结,认为添加保护活性中心、促进硫酸铵盐分解、提高表面酸性和氧化还原能力的助剂、采用合适制备方法、对载体预处理,以及对催化剂进行预硫化均会影响低温脱硝催化剂的抗硫性能。但SO2中毒位置和中毒机理不明确是阻碍低温脱硝催化剂工业应用的主要因素,这也是低温脱硝催化剂的发展方向。 | 魏永林 陈红萍 侯欣辛 杨旭 李泽清 | 2021 | 河北冶金2021，，2： | 1 |
| 6 | 钴掺杂Mn氧化物催化剂对NH_(3)-SCR活性及抗SO_(2)/H_(2)O中毒特性的研究显示文摘采用共沉淀法制备了一系列不同物质的量比的钴掺杂锰氧化物催化剂,并对其进行了系统表征。讨论了钴掺杂锰的氧化物催化剂的NH_(3)-SCR催化活性和抗水抗硫性能。结果表明,锰钴物质的量比为16∶1的Co(1)-MnO_(x)催化剂的催化性能最好,在100−275℃时实现了大于90%的NO_(x)转化率,并且耐水性和耐硫性较好。Co(1)-MnO_(x)催化剂呈现出球状结构,拥有相对较大的表面积。钴掺杂锰增加了催化剂表面的高价金属离子和化学吸附氧含量。Co(1)-MnO_(x)催化剂具有丰富的活性物种和酸性位点,降低了催化剂的表观活化能。 | 李海霞 靳乐颖 张安超 孙志君 张新民 朱崎峰 杨昌泽 张帅波 | 2022 | 燃料化学学报2022，50，11： | 1 |
| 7 | Fe、Ce双助剂增强型Nb/TiO_(2)催化剂的制备及其NH_(3)-SCR性能研究显示文摘采用柠檬酸络和法制备了Fe、Ce改性的系列Nb-Fe-Ce/TiO_(2)催化剂,考察了Fe、Ce助剂的引入对Nb/TiO_(2)催化剂的低温活性和反应温度窗口的影响。通过X射线衍射(XRD)、氮气吸附–脱附(BET)、热重(TG)、程序升温还原(H_(2)-TPR)等手段对催化剂进行了表征。结果表明,Fe、Ce改性的Nb/TiO_(2)催化剂在NH3-SCR反应中表现出较优的低温脱硝活性和较宽的操作温度窗口。优化配方后得到的10%Nb-0.7%Fe-3%Ce-TiO_(2)催化剂,在300℃时,其对NO转化率达100%,操作温度窗口为T80为225~500℃,这可能归因于Fe、Ce助剂引入后催化剂具有较强的Nb-Fe-Ce-Ti相互作用力和较好的氧化还原性能。 | 许俊强 杨传玲 余海杰 张强 郭芳 唐田 张艳容 | 2021 | 功能材料2021，52，5： | 1 |
| 8 | In Situ Growth of Vanadium Oxide on Reduced Graphene Oxide for the Low-Temperature NO-SCR by NH3显示文摘The vanadium oxide/reduced graphene oxide (V2O5/rGO) composite catalyst which determined the selective catalytic reduction activity (SCR) of NO with NH3 was prepared by a simple solvothermal method. The physicochemical properties of the catalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman, X-ray energy spectrometer (XPS) and N2 sorption isotherm measurement (BET). Results of NH3-SCR showed that the NO conversion of V2O5/rGO catalyst could reach 54.3% at 100 °C. And the removal of NO increased to 74.6% when the temperature was up to 220℃. By characterizing the microstructure and morphology of the V2O5/rGO catalysts prepared by in-situ growth and mechanical mixing methods, it was further shown that V2O5 nanoparticles were highly dispersed and in situ growth on the rGO surface. Based on X-ray energy spectrometer, V2O5/rGO catalyst had good low temperature denitrification performance due to the chemical adsorption oxygen and low-valent vanadium oxide contained in V2O5/rGO catalyst, which was beneficial to the redox reaction between V2O5 and graphene. | 李美颜 QI Yanyuan 金伟 JIAO Binqing ZHAO Jie | 2019 | Journal of Wuhan University of Technology(Materials Science)2019，34，3： | 0 |
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