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关键词

Cu(In 4

Ga)Se2 3

X射线 3

医院中子照射器I型堆 3

CCS 2

CO2利用 2

CO2封存 2

CO2捕集 2

COVID-19 2

催化剂 2

光催化 2

力学性能 2

宏转录组 2

碳中和 2

肠道菌群 2

长江口 2

高压 2

&alpha 1

(GaxIn1−x)2O3薄膜;带隙可调谐;磁控溅射 1

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NO<sub><i>xi>sub> and H<sub>2sub>S formation in the reductive zone of air-staged combustion of

Jinzhi CAI, Dan LI, Denggao CHEN, Zhenshan LI

《能源前沿(英文)》 2021年 第15卷 第1期   页码 4-13 doi: 10.1007/s11708-020-0804-y

摘要: Low NO combustion of blended coals is widely used in coal-fired boilers in China to control NO emission; thus, it is necessary to understand the formation mechanism of NO and H S during the combustion of blended coals. This paper focused on the investigation of reductive gases in the formation of NO and H S in the reductive zone of blended coals during combustion. Experiments with Zhundong (ZD) and Commercial (GE) coal and their blends with different mixing ratios were conducted in a drop tube furnace at 1200°C–1400°C with an excessive air ratio of 0.6–1.2. The coal conversion and formation characteristics of CO, H S, and NO in the fuel-rich zone were carefully studied under different experimental conditions for different blend ratios. Blending ZD into GE was found to increase not only the coal conversion but also the concentrations of CO and H S as NO reduction accelerated. Both the CO and H S concentrations inblended coal combustion increase with an increase in the combustion temperature and a decrease in the excessive air ratio. Based on accumulated experimental data, one interesting finding was that NO and H S from blended coal combustion were almost directly dependent on the CO concentration, and the CO concentration of the blended coal combustion depended on the single char gasification conversion.Thus, CO, NO , and H S formation characteristics from blended coal combustion can be well predicted by single char gasification kinetics.

关键词: blended coal combustion     NOx formation     H2S formation     air staged combustion    

NiFeRuO<sub><i>xi>sub> nanosheets on Ni foam as an electrocatalyst for efficient

《化学科学与工程前沿(英文)》 2023年 第17卷 第11期   页码 1698-1706 doi: 10.1007/s11705-023-2334-8

摘要: The electrocatalyst NiFeRuOx/NF, comprised of NiFeRuOx nanosheets grown on Ni foam, was synthesized using a hydrothermal process followed by thermal annealing. NiFeRuOx/NF displays high electrocatalytic activity and stability for overall alkaline seawater splitting: 98 mV@ 10 mA∙cm−2 in hydrogen evolution reaction, 318 mV@ 50 mA∙cm−2 in oxygen evolution reaction, and a cell voltage of 1.53 V@ 10 mA∙cm−2, as well as 20 h of durability. A solar-driven system containing such a bifunctional NiFeRuOx/NF has an almost 100% Faradaic efficiency. The NiFeRuOx coating around Ni foam is an anti-corrosion layer and also a critical factor for enhancement of bifunctional performances.

关键词: NiFeRuOx nanosheets     Ni foam     electrocatalysis     overall seawater splitting     solar-driven system    

H<sub>2sub> 对Pt-Ba-Ce /γ-Al<sub>2sub>O<sub>3sub> 催化剂NO<sub><i>xi>sub> 存储和还原机理的影响研究 Article

王攀, 裔静, 孙川, 罗鹏, 雷利利

《工程(英文)》 2019年 第5卷 第3期   页码 568-575 doi: 10.1016/j.eng.2019.02.005

摘要:

本研究采用浸渍法制备了Pt-Ba-Ce/γ-Al<sub>2sub>O<sub>3sub>催化剂,利用实验评价了H<sub>2sub> 对NSR(NO<sub>x<结果表明,透射电子显微镜(TEM)显示X 射线衍射(XRD)光谱中观察到的PtO<sub>xsub>、CeO<sub>2sub> 和BaCO<sub>3sub> 峰很好地分散在在NO<sub>xsub> 完全存储- 还原实验中,NO<sub>2sub> 产量的增加使NO<sub>xsub> 的存储能力在250~350 ℃ 的温度范围内大大提高在NO<sub>xsub> 吸附和脱附循环实验中,随着H<sub>2sub>暴露时间(30 s、45 s 和60 s)延长,NO<sub>xsub> 的存储效率和转化率增加当稀燃和富燃持续时间分别为240 s 和60 s 时,催化剂的NO<sub>xsub> 最大转化率达到83.5%。

关键词: Pt–Ba–Ce/γ-Al<sub>2sub>O<sub>3sub> 催化剂,物理化学性质,NO<sub><i>xi>sub>存储和还原,NO<sub><i>xi>sub> 排放,H<sub>2sub> 还原剂    

Effects of Pd doping on N

Mingxin Dong, Jun Wang, Jinxin Zhu, Jianqiang Wang, Wulin Wang, Meiqing Shen

《环境科学与工程前沿(英文)》 2017年 第11卷 第6期 doi: 10.1007/s11783-017-0976-9

摘要: N O is a powerful greenhouse gas and plays an important role in destructing the ozone layer. This present work investigated the effects of Pd doping on N O formation over Pt/BaO/Al O catalyst. Three types of catalysts, Pt/BaO/Al O , Pt/Pd mechanical mixing catalyst (Pt/BaO/Al O +Pd/Al O ) and Pt-Pd co-impregnation catalyst (Pt-Pd/BaO/Al O ) were prepared by incipient wetness impregnation method. These catalysts were first evaluated in NSR activity tests using H /CO as reductants and then carefully characterized by BET, CO chemisorption, CO-DRIFTs and H -TPR techniques. In addition, temperature programmed reactions of NO with H /CO were conducted to obtain further information about N O formation mechanism. Compared with Pt/BaO/Al O , (Pt/BaO/Al O +Pd/Al O ) produced less N O and more NH during NO storage and reduction process, while an opposite trend was found over (Pt-Pd/BaO/Al O +Al O ). Temperature programmed reactions of NO with H /CO results showed that Pd/Al O component in (Pt/BaO/Al O +Pd/Al O ) played an important role in NO reduction to NH , and the formed NH could reduce NO to N leading to a decrease in N O formation. Most of N O formed over (Pt-Pd/BaO/Al O +Al O ) was originated from Pd/BaO/Al O component. H -TPR results indicated Pd-Ba interaction resulted in more difficult-to-reduce PdO species over Pd/BaO/Al O , which inhibits the NO dissociation and thus drives the selectivity to N O in NO reduction.

关键词: NOx storage reduction     Pt/BaO/Al2O3     Pd doping     N2O formation     Optimization    

Superior performance in visible-light-driven hydrogen evolution reaction of three-dimensionally ordered macroporous SrTiO decorated with ZnCdS

《化学科学与工程前沿(英文)》 2021年 第15卷 第6期   页码 1561-1571 doi: 10.1007/s11705-021-2089-z

摘要: It is of broad interest to develop emerging photocatalysts with excellent light-harvesting capacity and high charge carrier separation efficiency for visible light photocatalytic hydrogen evolution reaction. However, achieving satisfying hydrogen evolution efficiency under noble metal-free conditions remains challenging. In this study, we demonstrate the fabrication of three-dimensionally ordered macroporous SrTiO3 decorated with ZnxCd1−xS nanoparticles for hydrogen production under visible light irradiation (λ>420 nm). Synergetic enhancement of photocatalytic activity is achieved by the slow photon effect and improved separation efficiency of photogenerated charge carriers. The obtained composites could afford very high hydrogen production efficiencies up to 19.67 mmol·g−1·h−1, with an apparent quantum efficiency of 35.9% at 420 nm, which is 4.2 and 23.9 times higher than those of pure Zn0.5Cd0.5S (4.67 mmol·g−1·h−1) and CdS (0.82 mmol·g−1·h−1), respectively. In particular, under Pt-free conditions, an attractive hydrogen production rate (3.23 mmol·g−1·h−1) was achieved, providing a low-cost and high-efficiency strategy to produce hydrogen from water splitting. Moreover, the composites showed excellent stability, and no obvious loss in activity was observed after five cycling tests.

关键词: three-dimensionally ordered macroporous SrTiO3     ZnxCd1–xS     visible light     hydrogen production     promotion mechanism    

Chemical poison and regeneration of SCR catalysts for NO<sub><i>xi>sub>

Junhua LI,Yue PENG,Huazhen CHANG,Xiang LI,John C. CRITTENDEN,Jiming HAO

《环境科学与工程前沿(英文)》 2016年 第10卷 第3期   页码 413-427 doi: 10.1007/s11783-016-0832-3

摘要: Selective catalytic reduction (SCR) of NO with NH is an effective technique to remove NO from stationary sources, such as coal-fired power plant and industrial boilers. Some of elements in the fly ash deactivate the catalyst due to strong chemisorptions on the active sites. The poisons may act by simply blocking active sites or alter the adsorption behaviors of reactants and products by an electronic interaction. This review is mainly focused on the chemical poisoning on V O -based catalysts, environmental-benign catalysts and low temperature catalysts. Several common poisons including alkali/alkaline earth metals, SO and heavy metals etc. are referred and their poisoning mechanisms on catalysts are discussed. The regeneration methods of poisoned catalysts and the development of poison-resistance catalysts are also compared and analyzed. Finally, future research directions in developing poisoning resistance catalysts and facile efficient regeneration methods for SCR catalysts are proposed.

关键词: flue gas     DeNOx     SCR catalyst     poison and regeneration    

Tailoring the simultaneous abatement of methanol and NO on Sb-Ce-Zr catalysts via copper modification

《环境科学与工程前沿(英文)》 2022年 第16卷 第10期 doi: 10.1007/s11684-022-1565-0

摘要:

● Cu addition enhances CH3OH oxidation and alleviates its inhibitory effect on SCR.

关键词: Copper modification     Sb-CeZr2Ox catalyst     NOx     Methanol     Simultaneous removal    

Recent advances in special morphologic photocatalysts for NO removal

《环境科学与工程前沿(英文)》 2022年 第16卷 第11期 doi: 10.1007/s11783-022-1573-0

摘要:

● Systematic information of recent progress in photocatalytic NO x removal is provided.

关键词: NOx removal     Photocatalyst     Graphene     C3N4     Bi-based compounds.    

用高光谱发光法研究Cu(In<sub><i>xi>sub>,Ga<sub>1–<i>xi>sub>)Se<sub>2sub> (CIGS)模块中由P1引起的功率损耗的成因 Article

César Omar Ramírez Quiroz, Laura-Isabelle Dion-Bertrand, Christoph J. Brabec, Joachim Müller, Kay Orgassa

《工程(英文)》 2020年 第6卷 第12期   页码 1395-1402 doi: 10.1016/j.eng.2019.12.019

摘要:

在本文中,我们利用了高光谱高分辨率光致发光映射技术,这是一个强大的工具,可用于选择和优化在Cu(In<sub>xsub>,Ga<sub>1-xsub>)Se<sub>2sub>(CIGS)模块上对子电池进行图案化互连的激光烧蚀工艺。

关键词: Cu(Inx     Ga1–x)Se2     电池到模块的效率差距     由P1引起的功率损耗     高光谱光致发光     激光烧蚀短程热效应    

CeO doping boosted low-temperature NH-SCR activity of FeTiO catalyst: A microstructure analysis and reaction mechanistic study

《环境科学与工程前沿(英文)》 2022年 第16卷 第5期 doi: 10.1007/s11783-022-1539-2

摘要:

• CeO2 doping significantly improved low-temperature NH3-SCR activity on FeTiOx.

关键词: NH3-SCR     CeO2 doping     Low-temperature NOx removal     Improved redox property     In situ XAFS analysis    

Influence of nozzle height to width ratio on ignition and NO

Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU

《能源前沿(英文)》 2021年 第15卷 第2期   页码 431-448 doi: 10.1007/s11708-021-0726-3

摘要: To improve the ignition behavior and to reduce the high NO emissions of blended pulverized fuels (PF) of semicoke (SC), large-scale experiments were conducted in a 300 kW fired furnace at various nozzle settings, i.e., ratios (denoted by / ) of the height of the rectangular burner nozzle to its width of 1.65, 2.32, and 3.22. The combustion tests indicate that the flame stability, ignition performance, and fuel burnout ratio were significantly improved at a nozzle setting of / = 2.32. The smaller / delayed ignition and caused the flame to concentrate excessively on the axis of the furnace, while the larger / easily caused the deflection of the pulverized coal flame, and a high-temperature flame zone emerged close to the furnace wall. NO emissions at the outlet of the primary zone decreased from 447 to 354 mg/m (O = 6%), and the ignition distance decreased from 420 to 246 mm when the / varied from 1.65 to 3.22. Furthermore, the ratio (denoted by / ) of the strong reduction zone area to the combustion reaction zone area was defined experimentally by the CO concentration to evaluate the reduction zone. The / rose monotonously, but its restraining effects on NO formation decreased as / increased. The results suggested that in a test furnace, regulating the nozzle / conditions sharply reduces NO emissions and improves the combustion efficiency of SC blends possessing an appropriate jet rigidity.

关键词: rectangular jet burner     nozzle height to width ratio     ignition characteristics     pyrolyzed semicoke (SC) and bituminous blend     NOx formation    

Simultaneous removal of NO and chlorobenzene on VO/TiO granular catalyst: Kinetic study and performance prediction

《环境科学与工程前沿(英文)》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1363-5

摘要:

• A V2O5/TiO2 granular catalyst for simultaneous removal of NO and chlorobenzene.

关键词: NOx     Chlorobenzene     Simultaneous removal     Kinetic study     Performance prediction     V2O5/TiO2     Graphical abstract    

磁控溅射法生长的带隙可调谐(GaxIn1−x)2O3 Research Articles

张法碧1,孙巾寓1,李海鸥1,周娟1,王荣1,孙堂友1,傅涛1,肖功利1,李琦1,刘兴鹏1,张秀云1,郭道友2,王相虎3,秦祖军1

《信息与电子工程前沿(英文)》 2021年 第22卷 第10期   页码 1370-1378 doi: 10.1631/FITEE.2000330

摘要: 采用磁控溅射技术和热退火技术在(0001)蓝宝石衬底上制备了多组分氧化物(GaxIn1−x)2O3薄膜,实现可调带隙。详细研究了三元化合物(GaxIn1−x)2O3在整个组成范围内的光学性质和能带结构演化。X射线衍射谱表明,Ga含量在0.11至0.55之间的(GaxIn1−x)2O3薄膜既有立方结构,也有单斜结构,而Ga含量高于0.74的(GaxIn1−x)2O3薄膜只有单斜结构。实验结果为透明导电化合物半导体(GaxIn1−x)2O3薄膜在光电和光伏行业的应用,特别是在显示器、发光二极管和太阳能电池的应用奠定了基础。

关键词: (GaxIn1−x)2O3薄膜;带隙可调谐;磁控溅射    

NO hydrogenation to NH over FeCu/TiO catalyst with improved activity

《化学科学与工程前沿(英文)》 2023年 第17卷 第12期   页码 1973-1985 doi: 10.1007/s11705-023-2364-2

摘要: Ammonia is crucial in industry and agriculture, but its production is hindered by environmental concerns and energy-intensive processes. Hence, developing an efficient and environmentally friendly catalyst is imperative. In this study, we employed a straightforward and efficient impregnation technique to create various Cu-doped catalysts. Notably, the optimized 10Fe-8Cu/TiO2 catalyst exhibited exceptional catalytic performance in converting NO to NH3, achieving an NO conversion rate exceeding 80% and an NH3 selectivity exceeding 98% at atmospheric pressure and 350 °C. We employed in situ diffuse reflectance Fourier transform infrared spectroscopy and conducted density functional theory calculations to investigate the intermediates and subsequent adsorption. Our findings unequivocally demonstrate that Cu doping enhances the rate-limiting hydrogenation step and lowers the energy barrier for NH3 desorption, thereby resulting in improved NO conversion and enhanced selectivity toward ammonia. This study presents a pioneering approach toward energy-efficient ammonia synthesis and recycling of nitrogen sources.

关键词: NO hydrogenation     synthetic ammonia     10Fe-xCu/TiO2     high selectivity    

Factors affecting photocatalytic performance through the evolution of the properties due to the phase transition from NaBiO·2HO to BiO

《能源前沿(英文)》 2022年 第16卷 第3期   页码 471-482 doi: 10.1007/s11708-021-0778-4

摘要: The phase transition process of a photocatalytic system from NaBiO3·2H2O to BiO2–x has been investigated to understand the important factors that affect photocatalytic performance in a composite system. It is found that a proper amount of BiO2–x on the surface of NaBiO3·2H2O could effectively suppress the electron/hole recombination and increase the exposed reactive sites for photocatalytic reaction. A fully covered BiO2–x on NaBiO3·2H2O results in a dramatical decrease of photocatalytic degradation of dye. An over long hydrothermal process can result in BiO2–x with reduced oxygen vacancies, which degrades the photocatalytic activity. Furthermore, the photocatalytic reduction ability of CO2 conversion has been investigated, indicating that the surface activity to different reactants also directly affects the catalytic performance. The investigation of the gradient phase transition process presents a clear guidance to construct a desired photocatalytic system, in addition to selecting gradient materials with suitable bandgap structure and a morphology with different fraction and distribution of each component. The defect evolution of each component during construction of a composite is also an important factor that should be optimized and considered in making a composite to achieve high photocatalytic efficiency.

关键词: composite construction     distribution     BiO2–x     evolution of defects    

标题 作者 时间 类型 操作

NO<sub><i>xi>sub> and H<sub>2sub>S formation in the reductive zone of air-staged combustion of

Jinzhi CAI, Dan LI, Denggao CHEN, Zhenshan LI

期刊论文

NiFeRuO<sub><i>xi>sub> nanosheets on Ni foam as an electrocatalyst for efficient

期刊论文

H<sub>2sub> 对Pt-Ba-Ce /γ-Al<sub>2sub>O<sub>3sub> 催化剂NO<sub><i>xi>sub> 存储和还原机理的影响研究

王攀, 裔静, 孙川, 罗鹏, 雷利利

期刊论文

Effects of Pd doping on N

Mingxin Dong, Jun Wang, Jinxin Zhu, Jianqiang Wang, Wulin Wang, Meiqing Shen

期刊论文

Superior performance in visible-light-driven hydrogen evolution reaction of three-dimensionally ordered macroporous SrTiO decorated with ZnCdS

期刊论文

Chemical poison and regeneration of SCR catalysts for NO<sub><i>xi>sub>

Junhua LI,Yue PENG,Huazhen CHANG,Xiang LI,John C. CRITTENDEN,Jiming HAO

期刊论文

Tailoring the simultaneous abatement of methanol and NO on Sb-Ce-Zr catalysts via copper modification

期刊论文

Recent advances in special morphologic photocatalysts for NO removal

期刊论文

用高光谱发光法研究Cu(In<sub><i>xi>sub>,Ga<sub>1–<i>xi>sub>)Se<sub>2sub> (CIGS)模块中由P1引起的功率损耗的成因

César Omar Ramírez Quiroz, Laura-Isabelle Dion-Bertrand, Christoph J. Brabec, Joachim Müller, Kay Orgassa

期刊论文

CeO doping boosted low-temperature NH-SCR activity of FeTiO catalyst: A microstructure analysis and reaction mechanistic study

期刊论文

Influence of nozzle height to width ratio on ignition and NO

Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU

期刊论文

Simultaneous removal of NO and chlorobenzene on VO/TiO granular catalyst: Kinetic study and performance prediction

期刊论文

磁控溅射法生长的带隙可调谐(GaxIn1−x)2O3

张法碧1,孙巾寓1,李海鸥1,周娟1,王荣1,孙堂友1,傅涛1,肖功利1,李琦1,刘兴鹏1,张秀云1,郭道友2,王相虎3,秦祖军1

期刊论文

NO hydrogenation to NH over FeCu/TiO catalyst with improved activity

期刊论文

Factors affecting photocatalytic performance through the evolution of the properties due to the phase transition from NaBiO·2HO to BiO

期刊论文