The MnZrOx composite catalyst was prepared by using Zr-MOF as the template by hydrothermal method to introduce Mn for the catalytic oxidation of toluene. The results showed that the T90 (the temperature of 90

The SnO2 doped 0.2 wt % Pt/TiO2 catalysts were prepared by wet impregnation method for the catalytic oxidation of toluene. The research focused on the SO2 resistance and catalytic performance of Pt/SnO2-TiO2. The results showed that T-90 (the temperature corresponding conversion of 90%) was 176 degrees C at 1000 ppm toluene concentration and weight hourly space velocity (WHSV) of 36 000 mL h(-1) g(-1). Adding 10 wt % SnO2 to the Pt/TiO2 catalyst reduced the adsorption capacity of the active component Pt for SO2, enhancing the catalyst's resistance to SO2 poisoning. Pt/SnO2-TiO2 catalysts could recover to the initial activity after 9 h poisoning with 2800 ppm thiophene. The Pt/SnO2-TiO2 also maintained good stability during the 60 h test at 240 degrees C with a toluene conversion larger than 99%. A series of characterization tests including XRD, H-2-TPR, and TEM revealed that Pt/SnO2-TiO2 possesses a mesoporous structure and a large amount of lattice oxygen, with Pt being uniformly dispersed on the carrier surface.

CuCoOx was prepared by in situ pyrolysis of Cu2+ partially substituted MOF-74 precursor with Co-MOF as a template for catalytic oxidation of toluene. T90 (the temperature corresponding conversion of 90

The particulate Pt/TiO2 catalyst was prepared by coprecipitation method for efficient catalytic combustion of toluene. The physicochemical properties of the as-prepared samples were explored by techniques including XRD, BET, XPS, and HRTEM. It was found that the reduction treatment not only introduced Ti3+ and a large amount of oxygen vacancies in the catalyst, but also produced Pt0. The catalytic activity is strongly affected by the synergistic effect of oxygen vacancies and platinum clusters within the sample, which also makes the catalyst’s catalytic activity for toluene oxidation much higher than that of the unreduced catalyst. With respect to the catalytic decomposition of toluene, the Pt/TiO2 catalyst with proper oxygen vacancies shows excellent catalytic performance with 100

A highly active MnO2 catalyst with mixed crystal forms for the catalytic combustion of ethyl acetate was successfully prepared. The characterization results showed that increasing the hydrothermal temperature promotes the transformation of MnO2 from α phase to β phase, and the microscopic morphology gradually evolves from stacked granular to rod-like structure, thereby obtaining biphasic mesoporous MnO2. In particular, the lattice fringes of α and β phases observed in HRTEM further proved that MnO2 possesses a dual-phase structure. XPS verified that MnO2–180°C has the highest Oads/Olatt (0.45) and Mn3+/Mn4+ (0.90) ratio, and as oxygen vacancies appear together with the formation of Mn3+ ions. The MnO2–180°C catalyst displayed the best performance that T99 (the temperature needed for 99

The hydrolysis-driven redox co-precipitation method was employed to initiate the reduction of KMnO4 by H2O2, facilitated by the generation of H+ through the hydrolysis of cobalt salts. This controlled redox kinetics resulted in the formation of a Co–Mn solid solution catalyst, which exhibited high efficiency in the catalytic oxidation of toluene. T90 (the reaction temperature corresponding to a conversion of 90

The MnCeOx catalysts were successfully prepared using a two-step hydrothermal method with Ce-MOF as a template for the complete catalytic oxidation of toluene. The effects of different Mn additions, calcination temperatures, and preparation methods on the material properties were investigated. In addition, the resistance of the catalysts to chlorosis was investigated. The results demonstrated that the 3%MnCeOx-300 showed the best catalytic activity with T90 only at 215 degrees C. Furthermore, after 2 h of 1, 2-dichloroethane toxicosis, the catalyst still converted >90% of the toluene, demonstrating good activity and anti-chlorine poisoning ability. Characterization results proved that the high activity and stability of the 3%MnCeOx-300 catalyst are attributed to the highest specific surface area and the highest Ce3+/Ce4+, Mn3+/Mn4+, and Olatt/O ratios.

Pt/OMS-2 were successfully prepared by in-situ method for catalytic combustion of toluene. The presence of Pt species had a remarkable promotion effect on catalytic performance of OMS-2. Amongst, 0.15Pt/OMS-2/3-300 completely removed toluene at just 220 ? under the conditions of the toluene concentration of 1100 ppm and the space velocity (WHSV) of 99000 mL(?)(g)(-) 1(?) h(- 1). Even at a high space velocity (WHSV = 240000 mL(?) g(-) 1(?) (h- 1)), the conversion of toluene still maintained 100 % at 240 C. Characterization results proved that Pt species not only increased the number of Mn4+/Mn3+, but also enhanced the ratio of and (O beta + O gamma)/O alpha.

The La-modified Cu-Mn spinel oxide was successfully coated onto honeycomb ceramic by a wash-coating method for complete catalytic decomposition of ethyl acetate. The La-modified Cu-Mn oxides were characterized by X-ray diffraction, X-ray fluorescence, H2-temperature programmed reduction, Brunauer-Emmett-Teller method, field-emission scanning electron microscopy and high-resolution transmission electron microscopy. The effects of different precipitants and rare earth doping on the structure and catalytic performance of the catalysts were investigated. The results show that the CuMn2O4 spinel with (NH4)2CO3 as a precipitant can form a larger specific surface area and a suitable pore size, which is beneficial to the absorption of ethyl acetate. Although the rare earth doping does not significantly change the crystal phase structure of the catalyst, it improves its reducibility and lowers the temperature of the catalytic decomposition. With respect to the catalytic decomposition of ethyl acetate, the rare earth-modified Cu-Mn oxide supported on honeycomb ceramic shows excellent catalytic per-formance with 100％ conversion under the conditions of 239 ℃, space velocity of 12500 h-1 and 1000 ppm. And the ethyl acetate removal rate is still 100％after 1440 min of continuous reaction.

选择性催化还原(Selective Catalytic Reduction)是应用最广泛、成熟度最高的脱硝技术.相比NH3-SCR等技术,以CO作为还原剂的CO-SCR脱硝技术更绿色环保,资源消耗更少.CO-SCR脱硝技术的核心是催化剂的制备.本文介绍了几种具备抗氧性的催化剂,包括贵金属催化剂、单一过渡金属催化剂、复合过渡金属催化剂等.对CO-SCR脱硝技术用催化剂的研究与应用进行了阐述和总结,以期为不同工况下氮氧化物的选择性催化还原处理的催化剂选择提供参考.

运用旋蒸法制备系列Cu/ZSM-5催化剂,测试比较以不同前驱体和不同的铜负载量、离子交换时间制备的催化剂的SCR性能.实验结果表明,以硝酸铜为前驱体、铜负载量为3％、离子交换时间为24 h制备的催化剂具有相对最佳的SCR性能,在225～425℃的温度区间内,NOx转化率在90％以上.不同交换时间制备的催化剂对ZSM-5分子筛内部结构的影响不明显.在离子交换时间为24 h条件下制备的催化剂,具有相对更为优异的氧化还原性能.

以蜂窝陶瓷为基体,采取不同载体制备了蜂窝陶瓷负载Cu-Mn尖晶石催化剂,对比了不同载体制备的催化剂的活性.XRD结果表明以钇改性的分子筛为载体能提高活性组分的分散性,TPR结果表明钇改性的载体能有效提高催化剂的低温催化性能.其催化结果表明负载量为25％的催化剂效果最好,在所有载体中,10％钇改性的Cu-Mn/Y-ZSM-5性能最优,当空速为15000 h-1,甲苯浓度为1000×10-6时,300℃能将甲苯完全转化.

The Cu-Mn composite catalyst was prepared by the deposition-precipitation for the complete oxidation of toluene,and the Cu/Mn molar ratio,the loading,the toluene concentration and the reaction space velocity were investigated. The catalysts were char-acterized by XRD,BET and TPR. The results showed that the formation of CuMn2O4spinel reduced the reduction temperature of the catalyst and improved the catalytic activity. When the molar ratio of Cu/Mn＝1 ∶ 2 and the loading was 25%,the best catalytic ac-tivity could be obtained,and toluene was decomposed into carbon dioxide and water with complete oxidation at only 250 ℃.

A series of mesoporous MnOx -CeO2/ γ -Al2 O3 catalysts were prepared by deposition -precipitation method and characterized by XRD and H2 -TPR. The effects of different manganese- cerium molar ratios,differ-ent manganese -cerium composite oxide loading,and different calcination temperatures on CO oxidation were in-vestigated. The results show that when n(Mn): n(Ce)= 7 : 3, the mass fraction of manganese-cerium com-posite oxide is 9% and the calcination temperature is 450℃,the CO effect is best for catalytic oxidation. The con-version rate of CO at 160 ℃ is up to 94%,and at 180 ℃ CO can be completely oxidized.

Activated carbon supported transition mental oxides catalysts by impregnation were studied for the direct catalytic decom-position of NO to N2. The catalysts were characterized by XRD and TEM,and the effects of different active contents,NiO loading, concentration of NO and space velocity on the decomposition of NO were investigated. The XRD result indicates that the NiO is the main component existed on the catalyst of NiO/AC. Moreover,the best NO conversion(100%)was obtained by NiO/AC at the tem-perature of 450℃.

Achiral monophosphine TPPTS [TPPTS: P(m-C6H4SO3Na)(3)]-stabilized Ru was successfully applied to catalyze the asymmetric hydrogenation of benzalacetone in ionic liquids using (S,S)-DPENDS [disodium salt of sulfonated (S,S)-1,2-diphenyl-1,2-ethylene-diamine] as chiral modifier. Under the optimized reaction conditions, the conversion of benzalacetone, chemoselectivity, and enantioselectivity of 4-phenyl-3-buten-2-ol could be reached up to 99.5%, 98.8%, and 74.6%, respectively. The TPPTS-stabilized Ru catalyst immobilized in ionic liquids could be easily separated from the resulting products by extraction with n-hexane, which could be recycled and reused five times without significant loss in activity, chemoselectivity, and enantioselectivity.

Drilling crew had the characteristic of strong liquidity,harsh conditions,field risk,etc. Based on the drilling crew for practice teaching activities,several problems needing attention were put forward. First,the preparation work needed to do fully; second,enough safety education must be done; third,reasonable use of the time and place to improve the efficiency of internship. The examining way should be reformed to increase the written test as the proportion of the final grade. Finally,several problems needing attention were proposed that improved the effect of the practice teaching effectively.

Combining the teaching practice of Oil and Gas Field Applied Chemistry, some experience of teaching and examination methods was put forward.First of all , the scientific and reasonable design of teaching content can stimulate students learning enthusiasm.Secondly , paying attention to physical , experimental video and 3 d demonstration teaching were proposed.Third, be good at discovering characteristics of students and motivating interest in learning.Finally, reforming the inspection way and increases of the innovative experiments as the proportion of the final grade were put forward.Combining with the teaching practice , the teaching effect and quality were improved effectively.

The asymmetric hydrogenation of aromatic ketones catalyzed by L-proline-modified Ru-PPh3/gamma-Al2O3 was investigated. The effects of reaction conditions on the asymmetric hydrogenation of acetophenone were discussed in detail. The results indicated that natural chiral compound L-proline has a good modification effect on the Ru-PPh3/gamma-Al2O3 catalyst. Under the optimum conditions, the conversion of acetophenone was up to 100%, and the enantioselectivity for the formation of (R)-phenyl ethanol was 59.5%. The synergistic effect between L-proline and KOH was observed. The chiral alcohol products could be easily separated by centrifugation. The catalyst was reused several times without remarkable change of enantioselectivity.