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催化氧化系统在甲醇制氢过程中的应用研究
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作者 张启 闫建波 李少雨 《中文科技期刊数据库(全文版)工程技术》 2024年第9期0102-0105,共4页
研究催化氧化系统在甲醇制氢过程中的应用效果。方法 利用浸渍法以及溶胶凝胶法制备CuO/CeO2-ZrO2/SiC整体催化剂,并和CuO/CeO2-ZrO2颗粒催化剂运用于甲醇制氢过程之中,测定甲醇转化率、产氢速率、重整气中一氧化碳体积分数、产品氢气组... 研究催化氧化系统在甲醇制氢过程中的应用效果。方法 利用浸渍法以及溶胶凝胶法制备CuO/CeO2-ZrO2/SiC整体催化剂,并和CuO/CeO2-ZrO2颗粒催化剂运用于甲醇制氢过程之中,测定甲醇转化率、产氢速率、重整气中一氧化碳体积分数、产品氢气组成(氢气摩尔分数、非氢气体总摩尔分数、H2O摩尔分数、总烃摩尔分数、O摩尔分数、He摩尔分数、N摩尔分数、Ar摩尔分数、CO摩尔分数、CO摩尔分数、总硫摩尔分数、甲醛摩尔分数、甲酸摩尔分数、NH摩尔分数、总卤化合物摩尔分数、最大颗粒物质量分数)并进行对比。结果 CuO/CeO2-ZrO2/SiC整体催化剂的甲醇转化率、产氢速率高于CuO/CeO2-ZrO2颗粒催化剂(P<0.05),重整气中一氧化碳体积分数低于CuO/CeO2-ZrO2颗粒催化剂(P<0.05),产品氢气组成优于CuO/CeO2-ZrO2颗粒催化剂(P<0.05)。结论 在甲醇制氢过程中催化氧化系统的制备复杂程度低、制氢效率高、产品氢气组成良好,能够满足甲醇制氢工作所需。 展开更多
关键词 甲醇制氢 催化氧化系统 甲醇转化率 产氢速率 产品氢气组成
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臭氧催化氧化系统在膜法有机浓水深度处理中的应用
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作者 袁少鹏 吴念鹏 +1 位作者 陈翔 石洁 《净水技术》 2024年第1期89-94,共6页
洱源县某污水厂处理规模为1.0×10^(4)m^(3)/d,主体工艺为“膜生物反应器(MBR)-纳滤”双膜工艺,其中纳滤系统产生的浓水经臭氧催化氧化处理系统处理后与纳滤产水混合,混合出水主要指标达到国家《地表水环境质量标准》(GB 3838—2002... 洱源县某污水厂处理规模为1.0×10^(4)m^(3)/d,主体工艺为“膜生物反应器(MBR)-纳滤”双膜工艺,其中纳滤系统产生的浓水经臭氧催化氧化处理系统处理后与纳滤产水混合,混合出水主要指标达到国家《地表水环境质量标准》(GB 3838—2002)中Ⅲ类(湖、库)标准,实现污水零排放。臭氧催化氧化处理系统采用两段式设计,处理规模为1000 m^(3)/d。臭氧催化氧化系统通水运行一年后的性能测试显示,系统总体处理效果稳定,臭氧催化氧化处理后化学需氧量(CODCr)平均质量浓度由148.39 mg/L降低到75.45 mg/L,耗电量约为1.85 kW·h/m^(3)。结果表明,臭氧催化氧化工艺是膜法有机浓水深度处理的有效工艺。 展开更多
关键词 臭氧催化氧化处理系统 污水零排放 化学需氧量(COD_(Cr)) 膜法有机浓水 深度处理
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声电催化氧化降解有机污染物的基础研究 被引量:6
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作者 陈卫国 熊亚 +1 位作者 彭玉凡 朱锡海 《水处理技术》 CAS CSCD 北大核心 2001年第3期152-155,共4页
采用自制的声电联用装置 ( UECOS) ,选择了苯酚、十二烷基苯碘酸钠 ( DBS)和邻苯二甲酸氢钾三种有机物为对象 ,研究了 UECOS技术去除有机污染物的机理主要是基于在电催化过程中生成 H2 O2 并迅速产生· OH羟基自由基对水中有机物的... 采用自制的声电联用装置 ( UECOS) ,选择了苯酚、十二烷基苯碘酸钠 ( DBS)和邻苯二甲酸氢钾三种有机物为对象 ,研究了 UECOS技术去除有机污染物的机理主要是基于在电催化过程中生成 H2 O2 并迅速产生· OH羟基自由基对水中有机物的强氧化作用。用声电联用技术 ( UECOS)处理有机污染物比单独的 ECS法去除率提高了 1 0 %~ 2 0 %。根据 IR、UV、GC- MS和 TOC的分析结果表明 ,有机反应物首先被氧化成小分子有机碎片 ,最终可被矿化为 CO2 和 H2 O。研究中用自旋捕集 ESR法测出了在 展开更多
关键词 声电催化氧化系统 UECOS 催化系统 ECS 活性中间体 有机污染物 废水处理
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声电催化氧化处理有机废水的机理研究 被引量:2
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作者 陈卫国 安太成 +1 位作者 彭玉凡 朱锡海 《中山大学学报(自然科学版)》 CAS CSCD 北大核心 2000年第z2期38-43,共6页
采用自制的声电联用装置,选择了苯酚、十二烷基苯磺酸钠(DBS)和邻苯二甲酸氢钾3种有机物为对象,研究UECOS技术去除有机污染物的机理,是基于在电催化过程中生成H2O2并迅速产生·OH羟基自由基对水中有机物的强氧... 采用自制的声电联用装置,选择了苯酚、十二烷基苯磺酸钠(DBS)和邻苯二甲酸氢钾3种有机物为对象,研究UECOS技术去除有机污染物的机理,是基于在电催化过程中生成H2O2并迅速产生·OH羟基自由基对水中有机物的强氧化作用.用声电联用技术(UECOS)处理有机污染物比单独的ECS法去除率提高了10%~20%.根据IR、UV、GC-MS和TOC的分析结果表明,有机反应物首先被氧化成小分子有机碎片,最终可被矿化为CO2和H2O.研究中用自旋捕集ESR法测出了在UECOS处理废水过程中不断产生的活性物种·OH. 展开更多
关键词 声电催化氧化系统(UECOS) 催化系统(ECS) 活性中间体 有机污染物 废水处理
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三相催化-ClO_2氧化处理难降解高浓度有机废水
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作者 殷兴军 《环境污染治理技术与设备》 CSCD 北大核心 2004年第9期24-24,共1页
关键词 CLO2 氧化处理技术 有机废水 催化氧化系统 废水处理工艺 催化氧化
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化学武器的销毁
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作者 李军 《火工情报》 2001年第1期30-38,共9页
关键词 化学武器 销毁系统 化学试剂 碱水解 催化氧化系统 销毁效率 三乙胺 芥子气 梭曼
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Catalytic Oxidative Desulfurization of Gasoline Using Vanadium(V)-substituted Polyoxometalate/H_2O_2/Ionic Liquid Emulsion System 被引量:2
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作者 Ge Jianhua Zhou Yuming +1 位作者 Yang Yong Xue Mengwei 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS 2012年第1期25-31,共7页
Aiming at deep desulfurization of gasoline,three amphiphilic catalysts [C18H37N(CH3)3]3+x [PMo12-xVxO40](x=1,2,or 3) were prepared and characterized.The amphiphilic vanadium(V)-substituted polyoxometalates were dissol... Aiming at deep desulfurization of gasoline,three amphiphilic catalysts [C18H37N(CH3)3]3+x [PMo12-xVxO40](x=1,2,or 3) were prepared and characterized.The amphiphilic vanadium(V)-substituted polyoxometalates were dissolved in water-immiscible ionic liquid([Bmim]PF6),forming a H2O2-in-[Bmim]PF6 emulsion desulfurization system with 30 m% H2O2 serving as the oxidant.The catalytic oxidation of sulfur-containing model oil has been studied in detail under various reaction conditions using this system.The ionic liquid emulsion system showed high catalytic oxidative activity in the treatment of commodity gasoline.Furthermore,the mechanism of catalytic oxidative desulfurization was also elaborated. 展开更多
关键词 DESULFURIZATION vanadium (V)-substituted polyoxometalates ionic liquid emulsion catalytic oxidation
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Blocking backward reaction on hydrogen evolution cocatalyst in a photosystem Ⅱ hybrid Z-scheme water splitting system 被引量:1
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作者 Zhen Li Yu Qi +6 位作者 Wangyin Wang Deng Li Zheng Li Yanan Xiao Guangye Han Jian-Ren Shen Can Li 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第4期486-494,M0001,共10页
Photocatalytic Z-scheme water splitting is considered as a promising approach to produce solar hydrogen.However,the forward hydrogen production reaction is often impeded by backward reactions.In the present study,in a... Photocatalytic Z-scheme water splitting is considered as a promising approach to produce solar hydrogen.However,the forward hydrogen production reaction is often impeded by backward reactions.In the present study,in a photosystem Ⅱ-integrated hybrid Z-scheme water splitting system,the backward hydrogen oxidation reaction was significantly suppressed by loading a PtCrOx cocatalyst on a ZrO2/TaON photocatalyst.Due to the weak chemisorption and activation of molecular hydrogen on PtCrOx,where Pt is stabilized in the oxidized forms,Pt^Ⅱ and Pt^Ⅳ,hydrogen oxidation is inhibited.However,it is remarkably well-catalyzed by the metallic Pt cocatalyst,thereby rapidly consuming the produced hydrogen.This work describes an approach to inhibit the backward reaction in the photosystem Ⅱ-integrated hybrid Z-scheme water splitting system using Fe(CN)6^3-/Fe(CN)6^4-redox couple as an electron shuttle. 展开更多
关键词 Water splitting COCATALYST Backward reaction Hydrogen oxidation Photosystem
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Oxidative desulfurization of dibenzothiophene over Fe promoted Co–Mo/Al_2O_3 and Ni–Mo/Al_2O_3 catalysts using hydrogen peroxide and formic acid as oxidants 被引量:3
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作者 Yaseen Muhammad Ayesha Shoukat +2 位作者 Ata Ur Rahman Haroon Ur Rashid Waqas Ahmad 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第3期593-600,共8页
This work reports the enhancing effect of a highly cost effective and efficient metal, Fe, incorporation to Co or Ni based Mo/Al2O3 catalysts in the oxidative desulfurization (ODS) of dibenzothiophene (DBT) using ... This work reports the enhancing effect of a highly cost effective and efficient metal, Fe, incorporation to Co or Ni based Mo/Al2O3 catalysts in the oxidative desulfurization (ODS) of dibenzothiophene (DBT) using H2O2 and formic acid as oxidants. The influence of operating parameters i.e. reaction time, catalyst dose, reaction temperature and oxidant amount on oxidation process was investigated. Results revealed that 99% DBT conversion was achieved at 60℃ and 150 min reaction time over Fe-Ni-Mo/Al2O3. Fe tremendously enhanced the ODS activity of Co or Ni based Mo/Al2O3 catalysts following the activity order:Fe-Ni-Mo/Al2O3 〉 Fe-Co-Mo/Al2O3 〉 Ni-Mo/Al2O3 〉 Co-Mo/Al2O3, while H2O2 exhibited higher oxidation activity than formic acid over all catalyst systems. Insight about the surface morphology and textural properties of fresh and spent catalysts were achieved using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray (EDX) analysis, Atomic Absorption Spectroscopy (AAS) and BET surface area analysis, which helped in the interpretation of experimental data. The present study can be deemed as an effective approach on industrial level for ODS of fuel oils crediting to its high efficiency, low process/catalyst cost, safety and mild operating condition. 展开更多
关键词 Oxidative desulfurization Fuel oil Dibenzothiophene Fe promoted (Co/Ni)-Mo/Al2O3 catalyst XRD
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Selective aerobic oxidation of p-cresol with co-catalysts between metalloporphyrins and metal salts 被引量:1
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作者 Yuanbin She Yao Fan +3 位作者 Lei Zhang Ying Xu Min Yu Haiyan Fu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第7期1493-1498,共6页
A green and efficient method for the selective aerobic oxidation of p-cresol to p-hydroxybenzaldehyde catalyzed by co-catalysts between metalloporphyrins and metal salts was investigated and developed. The relationshi... A green and efficient method for the selective aerobic oxidation of p-cresol to p-hydroxybenzaldehyde catalyzed by co-catalysts between metalloporphyrins and metal salts was investigated and developed. The relationship between the synergistic catalytic effects and the composition as well as amount of co-catalysts was investigated. Moreover, the influence of different reaction conditions was studied in details. A high p-cresol conversion (〉99%) and p-hydroxybenzaldehyde selectivity (83%) were obtained using only 1.125 × 10- 5 mol T(p-CH3O)PPFe111Cl-Co(OAc)2 used under mild, optimized reaction conditions. A possible mechanism for the reaction was also proposed. This work would be meaningful and instructive for the further researches and applications of co-catalyst system on oxidation of cresols and could give some enlightenment on the selectively catalytic oxidation of the side-chain alkyls of aromatics. 展开更多
关键词 AEROBIC Oxidation Selectivity CO-CATALYST METALLOPORPHYRIN CRESOLS
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日发明低成本工业废水处理法
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《发酵科技通讯》 CAS 2003年第3期38-38,共1页
位居日本大阪的Shokubai公司正在推销一种湿法氧化催化系统,可使工业污水的处理成本比活性污泥法和焚烧法削减30%~50%。该法简称NSLC法。设计用于处理10t/a以上的含多种物质的废水,包括甲醛、乙醛、苯酚、甲基丙烯酸甲酯、丙酮、四... 位居日本大阪的Shokubai公司正在推销一种湿法氧化催化系统,可使工业污水的处理成本比活性污泥法和焚烧法削减30%~50%。该法简称NSLC法。设计用于处理10t/a以上的含多种物质的废水,包括甲醛、乙醛、苯酚、甲基丙烯酸甲酯、丙酮、四氢呋喃、乙二醇、硫化物、氨、异氰酸酯和丙烯腈。 展开更多
关键词 日本 低成本 工业废水 废水处理 湿法氧化催化系统 NSLC法
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A new nanocluster polyoxomolybdate [Mo_(36)O_(110)(NO)_4(H_2O)_(14)]·52H_2O:Synthesis, characterization and application in oxidative degradation of common organic dyes
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作者 Mojtaba Amini Mostafa Khaksar +1 位作者 Arkady Ellern L.Keith Woo 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2018年第2期337-342,共6页
Polyoxomolybdate [Mo36O110(NO)4(H2O)14].52H2O was synthesized by a simple one-pot procedure through reducing an acidified mixture of Na2MoO4.2H2O and NH2OH. HCl. In order to create a heterogeneous catalyst system,... Polyoxomolybdate [Mo36O110(NO)4(H2O)14].52H2O was synthesized by a simple one-pot procedure through reducing an acidified mixture of Na2MoO4.2H2O and NH2OH. HCl. In order to create a heterogeneous catalyst system, the polyoxomolybdate was pillared with MgAI-LDH-NO3 by direct ion exchange. These novel materials were carefully analyzed by various chemico-physical methods, The catalytic degradation of methylene blue (MB) and rhodamine B (RB) as common dyes in the presence of MgAl-LDH-1 nanoparticles with aqueous hydrogen peroxide, H2O2, as an oxidizing agent was studied in aqueous solution at room temperature. More importantly, the catalyst can be recovered and reused efficiently up to five consecutive cycles with negligible loss of catalytic activity. 展开更多
关键词 Nanocluster Polyoxomolybdate LDH Methylene blue Rhodamine B
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日发明低成本工业废水处理法
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作者 陶圣如 《浙江化工》 CAS 2003年第1期22-22,共1页
关键词 日本 Shokubai公司 湿法氧化催化系统 发明 低成本 工业废水处理法
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Experimental Study of a Photocatalytic Reactor for Trace Formaldehyde Removal
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作者 刘红敏 连之伟 +1 位作者 叶晓江 上官文峰 《Journal of Donghua University(English Edition)》 EI CAS 2005年第3期111-115,共5页
Formaldehyde is the key contaminant influencing building occupants' health in indoor environment. In order to reduce occupants' exposures to formaldehyde, a newly designed photocatalytic reactor was applied in a dyn... Formaldehyde is the key contaminant influencing building occupants' health in indoor environment. In order to reduce occupants' exposures to formaldehyde, a newly designed photocatalytic reactor was applied in a dynamic HVAC (heating, ventilation and air conditioning) system. The experiments were carried out for the removal of formaldehyde present in air at low parts per million (ppm) concentrations. The initial formaldehyde concentrations were set as 1.59 ppm and 0.27 ppm respectively, based on the formaldehyde levels in the polluted places. Experimental results show that the photocatalytic reactor is effective on formaldehyde photodegradation, causes a low pressure drop, and does not make the second pollution of ozone. The kinetic anaiysis indicates that the kinetics for oxidation processes can be fitted well by a pseudo-first-order kinetic model deduced from Langmuir - Hinshelwood (L-H) model. 展开更多
关键词 FORMALDEHYDE titanium dioxide photocatalytic reactor air-conditioning system
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Studies on the roles of vanadyl sulfate and sodium nitrite in catalytic oxidation of benzyl alcohol with molecular oxygen 被引量:1
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作者 Zhongtian Du Junxia Liu +2 位作者 Tianliang Lu Yangyang Ma Jie Xu 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第1期114-122,共9页
An efficient catalytic system consisting of vanadyl sulfate/sodium nitrite was disclosed previously for the oxidation of benzylic alcohols into aldehydes with molecular oxygen.However,the roles of catalyst components ... An efficient catalytic system consisting of vanadyl sulfate/sodium nitrite was disclosed previously for the oxidation of benzylic alcohols into aldehydes with molecular oxygen.However,the roles of catalyst components were not investigated.In this paper,we examined catalytic oxidation of benzyl alcohol as a model reaction,especially by infrared spectroscopy.The role of each component is discussed including nitrite,vanadyl,sulphate,and water.Sodium nitrite could be converted into nitrate and nitric acid.The vanadium(IV)could be smoothly oxidized into vanadium(V)under mild and acidic conditions without any organic ligands.The transformation of sulfate and bisulfate,the cessation of an induction period,and the oxidation of benzyl alcohol were closely interrelated.The multiple roles of water are discussed,including reduction of the induction period,participation in redox cycles of nitric compounds,deactivation of vanadium,and as a byproduct of oxidation.This study contributes to further development of aerobic oxidation using vanadium based catalysts. 展开更多
关键词 catalytic oxidation ALCOHOL infrared spectroscopy NITRITE VANADIUM
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Oxygen as an oxidant in rhodium(III) catalyzed oxidative C–H/C–H cross-coupling between indoles and oxazoles
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作者 Yan Wang Jingbo Lan 《Science China Chemistry》 SCIE EI CAS CSCD 2018年第2期200-205,共6页
A Rh(III)-catalyzed oxidative C–H/C–H cross-coupling between indoles and oxazoles with molecular oxygen as an oxidant has been developed to construct a variety of 2-(indol-2-yl)oxazoles. The chelation-assisted strat... A Rh(III)-catalyzed oxidative C–H/C–H cross-coupling between indoles and oxazoles with molecular oxygen as an oxidant has been developed to construct a variety of 2-(indol-2-yl)oxazoles. The chelation-assisted strategy endows this catalytic system with an excellent C2-site selectivity by introducing a pyrimidyl directing group. In addition, polycyclic pyridinium salts are also obtained via Rh(III)-catalyzed C–H activation/cyclization of 2-(indol-2-yl)oxazoles with alkynes. 展开更多
关键词 rhodium catalyzed molecular oxygen C–H/C–H cross-coupling chelation-assisted strategy
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Recent advances in Ni-Al bimetallic catalysis for unreactive bond transformation
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作者 Yin-Xia Wang Mengchun Ye 《Science China Chemistry》 SCIE EI CAS CSCD 2018年第8期1004-1013,共10页
Ni-Al bimetallic catalysis proves to be an efficient catalytic strategy for unreactive bond transformations. Recently, chiral bifunctional ligands, especially amphoteric secondary phosphine oxide(SPO) ligand, are used... Ni-Al bimetallic catalysis proves to be an efficient catalytic strategy for unreactive bond transformations. Recently, chiral bifunctional ligands, especially amphoteric secondary phosphine oxide(SPO) ligand, are used for a more powerful synergistic effect in the bimetal-catalyzed reactions, providing not only milder reaction conditions and higher reactivity but also excellent reaction selectivity. Herein, we give a brief review on the development of Ni-Al bimetallic catalytic system and highlight recent advances in enantioselective Ni-Al bimetallic catalysis for unreactive bond transformation. 展开更多
关键词 nickel aluminum bimetallic catalysis SPO ligand unreactive bond
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