Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 1037

年份

2024 3

2023 108

2022 83

2021 120

2020 85

2019 75

2018 53

2017 76

2016 59

2015 62

2014 36

2013 49

2012 40

2011 29

2010 40

2009 35

2008 15

2007 13

2006 8

2005 6

展开︾

关键词

Cu(In 4

Ga)Se₂ 3

CCS 2

CO₂利用 2

CO₂封存 2

CO₂捕集 2

二氧化碳 2

低碳发展 2

催化剂 2

光催化 2

智能制造 2

核能 2

热力学 2

碳中和 2

高温气冷堆 2

&alpha 1

(GaxIn1−x)2O3薄膜；带隙可调谐；磁控溅射 1

(美国) 核管理委员会 1

/III-V界面 1

展开︾

检索范围：

排序：展示方式：

Co-pyrolysis of oil sludge with hydrogen-rich plastics in a vertical stirring reactor: Kinetic analysis, emissions, and products

《环境科学与工程前沿（英文）》 2022年第16卷第10期 doi: 10.1007/s11783-022-1570-3

摘要：

● Collaborative treatment of plastics and OS was established to improve oil quality.

关键词： Oily sludge Pyrolysis Polyethylene H/C_eff ratio Oil quality

HTML PDF 收藏

A density functional theory study of methane activation on MgO supported NiM cluster: role of M on C–H

《化学科学与工程前沿（英文）》 2022年第16卷第10期页码 1485-1492 doi: 10.1007/s11705-022-2169-8

摘要： Methane activation is a pivotal step in the application of natural gas converting into high-value added chemicals via methane steam/dry reforming reactions. Ni element was found to be the most widely used catalyst. In present work, methane activation on MgO supported Ni–M (M = Fe, Co, Cu, Pd, Pt) cluster was explored through detailed density functional theory calculations, compared to pure Ni cluster. CH₄ adsorption on Cu promoted Ni cluster requires overcoming an energy of 0.07 eV, indicating that it is slightly endothermic and unfavored to occur, while the adsorption energies of other promoters M (M = Fe, Co, Pd and Pt) are all higher than that of pure Ni cluster. The role of M on the first C–H bond cleavage of CH₄ was investigated. Doping elements of the same period in Ni cluster, such as Fe, Co and Cu, for C–H bond activation follows the trend of the decrease of metal atom radius. As a result, Ni–Fe shows the best ability for C–H bond cleavage. In addition, doping the elements of the same family, like Pd and Pt, for CH₄ activation is according to the increase of metal atom radius. Consequently, C–H bond activation demands a lower energy barrier on Ni–Pt cluster. To illustrate the adsorptive dissociation behaviors of CH₄ at different Ni–M clusters, the Mulliken atomic charge was analyzed. In general, the electron gain of CH₄ binding at different Ni–M clusters follows the sequence of Ni–Cu (–0.02 e) < Ni (–0.04 e) < Ni–Pd (–0.08 e) < Ni–Pt (–0.09 e) < Ni–Co (–0.10 e) < Ni–Fe (–0.12 e), and the binding strength between catalysts and CH ₄ raises with the CH₄ electron gain increasing. This work provides insights into understanding the role of promoter metal M on thermal-catalytic activation of CH₄ over Ni/MgO catalysts, and is useful to interpret the reaction at an atomic scale.

关键词： CH₄ dissociation Ni–M C–H bond activation charge transfer

HTML PDF 收藏

H∞sub> control in the frequency domain for a semi-active floor isolation system

Yundong SHI, Tracy C BECKER, Masahiro KURATA, Masayoshi NAKASHIMA

《结构与土木工程前沿（英文）》 2013年第7卷第3期页码 264-275 doi: 10.1007/s11709-013-0214-x

摘要： A floor isolation system installed in a single floor or room in a fixed base structure is designed to protect equipment. With this configuration, the input motions to the floor isolation from the ground motions are filtered by the structure, leaving the majority of the frequency content of the input motion lower than the predominant frequency of the structure. The floor isolation system should minimize the acceleration to protect equipment; however, displacement must also be limited to save floor space, especially with long period motion. Semi-active control with an control was adopted for the floor isolation system and a new input shaping filter was developed to account for the input motion characteristics and enhance the effectiveness of the control. A series of shake table tests for a semi-active floor isolation system using rolling pendulum isolators and a magnetic-rheological damper were performed to validate the control. Passive control using an oil damper was also tested for comparison. The test results show that the control effectively reduced acceleration for short period motions with frequencies close to the predominant frequency of the structure, as well as effectively reduced displacement for long period motions with frequencies close to the natural frequency of the floor isolation system. The control algorithm proved to be more advantageous than passive control because of its capacity to adjust control strategies according to the different motion frequency characteristics.

关键词： semi-active floor isolation H_∞ control MR damper shaping filter shaking table test

HTML PDF 收藏

encapsulating M(Co, Fe)-Ni alloy for electrochemical production of syngas with potential-independent CO/H

《化学科学与工程前沿（英文）》 2022年第16卷第4期页码 498-510 doi: 10.1007/s11705-021-2082-6

摘要： The electrochemical conversion of CO₂-H₂O into CO-H₂ using renewable energy is a promising technique for clean syngas production. Low-cost electrocatalysts to produce tunable syngas with a potential-independent CO/H₂ ratio are highly desired. Herein, a series of N-doped carbon nanotubes encapsulating binary alloy nanoparticles (M_xNi-NCNT, M= Fe, Co) were successfully fabricated through the co-pyrolysis of melamine and metal precursors. The M_xNi-NCNT samples exhibited bamboo-like nanotubular structures with a large specific surface area and high degree of graphitization. Their electrocatalytic performance for syngas production can be tuned by changing the alloy compositions and modifying the electronic structure of the carbon nanotube through the encapsulated metal nanoparticles. Consequently, syngas with a wide range of CO/H₂ ratios, from 0.5:1 to 3.4:1, can be produced on M_xNi-NCNT. More importantly, stable CO/H₂ ratios of 2:1 and 1.5:1, corresponding to the ratio to produce biofuels by syngas fermentation, could be realized on Co₁Ni-NCNT and Co₂Ni-NCNT, respectively, over a potential window of –0.8 to –1.2 V versus the reversible hydrogen electrode. Our work provides an approach to develop low-cost and potential-independent electrocatalysts to effectively produce syngas with an adjustable CO/H₂ ratio from electrochemical CO₂ reduction.

关键词： electrochemical reduction of CO₂ syngas N-doped carbon nanotubes encapsulated alloy nanoparticles CO/H₂ ratio

HTML PDF 收藏

New insight into effect of potential on degradation of Fe-N-C catalyst for ORR

Yanyan GAO, Manman QI, Liang HE, Haiping CHEN, Wenzhe LUO, Ming HOU, Zhigang SHAO

《能源前沿（英文）》 2021年第15卷第2期页码 421-430 doi: 10.1007/s11708-021-0727-2

摘要： In recent years, Fe-N-C catalyst is particularly attractive due to its high oxygen reduction reaction (ORR) activity and low cost for proton exchange membrane fuel cells (PEMFCs). However, the durability problems still pose challenge to the application of Fe-N-C catalyst. Although considerable work has been done to investigate the degradation mechanisms of Fe-N-C catalyst, most of them are simply focused on the active-site decay, the carbon oxidation, and the demetalation problems. In fact, the 2e pathway in the ORR process of Fe-N-C catalyst would result in the formation of H O , which is proved to be a key degradation source. In this paper, a new insight into the effect of potential on degradation of Fe-N-C catalyst was provided by quantifying the H O intermediate. In this case, stability tests were conducted by the potential-static method in O saturated 0.1 mol/L HClO . During the tests, H O was quantified by rotating ring disk electrode (RRDE). The results show that compared with the loading voltage of 0.4 V, 0.8 V, and 1.0 V, the catalysts being kept at 0.6 V exhibit a highest H O yield. It is found that it is the combined effect of electrochemical oxidation and chemical oxidation (by aggressive radicals like H O /radicals) that triggered the highest H O release rate, with the latter as the major cause.

关键词： proton exchange membrane fuel cells (PEMFCs) oxygen reduction reaction (ORR) Fe-N-C catalyst potential H₂O₂ degradation

HTML PDF 收藏

过硫酸盐诱导的缺陷氮化碳中三配位氮（N3Csub>）空位增强光催化产过氧化氢 Article

缪蔚, 王奕杰, 刘莹, 秦贺贺, 褚成成, 毛舜

《工程（英文）》 2023年第25卷第6期页码 214-221 doi: 10.1016/j.eng.2021.12.016

摘要：其中石墨氮化碳（g-C3sub>N4sub>）被认为是最有前途的合成过氧化氢的光催化剂之一；并且，在g-C3sub>N4sub>中引入氮空位已被证明是提高其光催化活性的有效策略在此，本文提出了一种简便的过硫酸钠共晶聚合方法，制备了具有丰富三配位氮空位（N3Csub>）的g-C3sub>N4sub>。本研究的结果表明，在g-C3sub>N4sub>中引入N3Csub>空位可以成功地拓宽光吸收范围，抑制光激发电荷的重组，增强O2sub>的吸附和活化富含N3Csub>空位的g-C3sub>N4sub>的光催化过氧化氢产量是原始g-C3sub>N4sub>的4.5倍。本研究提出了在g-C3sub>N4sub>中引入N3Csub>空位的新策略，为开发光催化产过氧化氢的活性催化剂提供了一种新方法。

关键词：氮化碳 N3Csub>空位过氧化氢光催化过硫酸盐

HTML PDF 收藏

天然气提质过程中可有效回收丙烷和乙烷的高工业应用潜力金属有机框架材料 Article

咸士凯, 彭俊杰, Haardik Pandey, Timo Thonhauser, 王浩, 李静

《工程（英文）》 2023年第23卷第4期页码 56-63 doi: 10.1016/j.eng.2022.07.017

摘要：

开发具有高吸收和选择性的高效吸附剂用于从天然气中分离和回收C2sub>H6sub>和C3sub>H8sub>是一项重要但具有挑战性的任务。值得注意的是，MOF-303 在298 K和5 kPa 下对C3H8的吸收高达3.38 mmol∙g⁻¹，C3sub>H8sub>/CH<sub此外，MOF-303 也显示出很高的C2H6吸收能力（在10 kPa 时）和C2sub>H6sub>/CH4 sub>(10:85, V/C3sub>H8sub>和C2sub>H6sub>的亲和力，从而产生了对C3sub>H8sub>和C2sub>H6sub>的高负载能力和选择性。

关键词：金属-有机框架，烃类吸附和分离，选择性，稳定性，放大合成

HTML PDF 收藏

固体氧化物电解池共电解H2sub>O/CO2sub>研究进展

范慧,宋世栋,韩敏芳

《中国工程科学》 2013年第15卷第2期页码 107-112

摘要：本文介绍了固体氧化物电解池的结构特点及其用于H2O/CO2的共电解制备H2和CO的工作原理，综述了固体氧化物电解池的组成形式，以及单片电解池和电解池堆用于H2O/CO2共电解反应的国内外研究进展，并阐述了提高固体氧化物电解池共电解效率所亟需解决的问题

关键词：固体氧化物电解池 H2sub>O/CO2sub>共电解合成气电解效率水电解

HTML PDF 收藏

NOxsub> and H2sub>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 NO_xformation H₂S formation air staged combustion

HTML PDF 收藏

An investigation of reaction furnace temperatures and sulfur recovery

S. ASADI, M. PAKIZEH, M. POURAFSHARI CHENAR

《化学科学与工程前沿（英文）》 2011年第5卷第3期页码 362-371 doi: 10.1007/s11705-011-1106-z

摘要： In a modern day sulfur recovery unit (SRU), hydrogen sulfide (H S) is converted to elemental sulfur using a modified Claus unit. A process simulator called TSWEET has been used to consider the Claus process. The effect of the H S concentration, the H S/CO ratio, the input air flow rate, the acid gas flow of the acid gas (AG) splitter and the temperature of the acid gas feed at three different oxygen concentrations (in the air input) on the main burner temperature have been studied. Also the effects of the tail gas ratio and the catalytic bed type on the sulfur recovery were studied. The bed temperatures were optimized in order to enhance the sulfur recovery for a given acid gas feed and air input. Initially when the fraction of AG splitter flow to the main burner was increased, the temperature of the main burner increased to a maximum but then decreased sharply when the flow fraction was further increased; this was true for all three concentrations of oxygen. However, if three other parameters (the concentration of H S, the ratio H S/CO and the flow rate of air) were increased, the temperature of the main burner increased monotonically. This increase had different slopes depending on the oxygen concentration in the input air. But, by increasing the temperature of the acid gas feed, the temperature of the main burner decreased. In general, the concentration of oxygen in the input air into the Claus unit had little effect on the temperature of the main burner (This is true for all parameters). The optimal catalytic bed temperature, tail gas ratio and type of catalytic bed were also determined and these conditions are a minimum temperature of 300°C, a ratio of 2.0 and a hydrolysing Claus bed.

关键词： Claus unit concentration of H₂S tail gas ratio sulfur recovery catalytic bed

HTML PDF 收藏

growth of a-few-layered MoS on CdS nanorod for high efficient photocatalytic H production

《能源前沿（英文）》 2021年第15卷第3期页码 752-759 doi: 10.1007/s11708-021-0779-3

摘要： An ultrathin MoS₂ was grown on CdS nanorod by a solid state method using sulfur powder as sulfur source for photocatalytic H₂ production. The characterization result reveals that the ultrathin MoS₂ nanosheets loaded on CdS has a good contact state. The photoelectrochemical result shows that MoS₂ not only are beneficial for charge separation, but also works as active sites, thus enhancing photocatalytic activity. Compared with pure CdS, the photocatalytic activity of MoS₂ loaded CdS was significantly improved. The hydrogen evolution rate on m(MoS₂): m(CdS) = 1: 50 (m is mass) reaches 542 μmol/h, which is 6 times of that on pure CdS (92 μmol/h). This work provides a new design for photocatalysts with high photocatalytic activities and provides a deeper understanding of the effect of MoS₂ on enhancing photocatalytic activity.

关键词： photocatalytic H₂ production CdS MoS₂ cocatalyst charge separation

HTML PDF 收藏

催化氧化净化黄磷尾气中的磷和硫

宁平,Hans-JörgBart,王学谦,马丽萍,陈梁

《中国工程科学》 2005年第7卷第6期页码 27-35

摘要： KU2和活性炭都能通过催化氧化过程有效脱除黄磷尾气中的P4sub>，PH3sub>和H2sub>S杂质，随着反应温度和氧含量增加可显著提高净化效果，在最优条件下

关键词：催化剂催化氧化 H2sub>S P4sub> PH3sub> 固定床

HTML PDF 收藏

Photoelectrocatalytic generation of H and S from toxic HS by using a novel BiOI/WO nanoflake array photoanode

《能源前沿（英文）》 2021年第15卷第3期页码 744-751 doi: 10.1007/s11708-021-0775-7

摘要： In this paper, a photoelectrocatalytic (PEC) recovery of toxic H₂S into H₂ and S system was proposed using a novel bismuth oxyiodide (BiOI)/ tungsten trioxide (WO₃) nano-flake arrays (NFA) photoanode. The BiOI/WO₃ NFA with a vertically aligned nanostructure were uniformly prepared on the conductive substrate via transformation of tungstate following an impregnating hydroxylation of BiI₃. Compared to pure WO₃ NFA, the BiOI/WO₃ NFA promotes a significant increase of photocurrent by 200%. Owing to the excellent stability and photoactivity of the BiOI/WO₃ NFA photoanode and I^–/

I 3 −

catalytic system, the PEC system toward splitting of H₂S totally converted S^2– into S without any polysulfide (

S x n −

) under solar-light irradiation. Moreover, H₂ was simultaneously generated at a rate of about 0.867 mL/(h·cm). The proposed PEC H₂S splitting system provides an efficient and sustainable route to recover H₂ and S.

关键词： bismuth oxyiodide (BiOI)/ tungsten trioxide (WO₃) nano-flake arrays (NFA) photoelectrocatalytic (PEC) H₂S splitting H₂ S

HTML PDF 收藏

Nickel(II) ion-intercalated MXene membranes for enhanced H2sub>/CO2sub> separation

Yiyi Fan, Jinyong Li, Saidi Wang, Xiuxia Meng, Yun Jin, Naitao Yang, Bo Meng, Jiaquan Li, Shaomin Liu

《化学科学与工程前沿（英文）》 2021年第15卷第4期页码 882-891 doi: 10.1007/s11705-020-1990-1

摘要： Hydrogen fuel has been embraced as a potential long-term solution to the growing demand for clean energy. A membrane-assisted separation is promising in producing high-purity H . Molecular sieving membranes (MSMs) are endowed with high gas selectivity and permeability because their well-defined micropores can facilitate molecular exclusion, diffusion, and adsorption. In this work, MXene nanosheets intercalated with Ni were assembled to form an MSM supported on Al O hollow fiber via a vacuum-assisted filtration and drying process. The prepared membranes showed excellent H /CO mixture separation performance at room temperature. Separation factor reached 615 with a hydrogen permeance of 8.35 × 10 mol·m ·s ·Pa . Compared with the original Ti C T /Al O hollow fiber membranes, the permeation of hydrogen through the Ni -Ti C T /Al O membrane was considerably increased, stemming from the strong interaction between the negatively charged MXene nanosheets and Ni . The interlayer spacing of MSMs was tuned by Ni . During 200-hour testing, the resultant membrane maintained an excellent gas separation without any substantial performance decline. Our results indicate that the Ni tailored Ti C T /Al O hollow fiber membranes can inspire promising industrial applications.

关键词： MXene H₂/CO₂ separation nickel ions hollow fiber

HTML PDF 收藏

grown TiN/N-TiO composite for enhanced photocatalytic H evolution activity

《能源前沿（英文）》 2021年第15卷第3期页码 721-731 doi: 10.1007/s11708-021-0766-8

摘要： Titanium nitride (TiN) decorated N-doped titania (N-TiO₂) composite (TiN/N-TiO₂) is fabricated via an in situ nitridation using a hydrothermally synthesized TiO₂ and melamine (MA) as raw materials. After the optimization of the reaction condition, the resultant TiN/N-TiO₂ composite delivers a hydrogen evolution activity of up to 703 μmol/h under the full spectrum irradiation of Xe-lamp, which is approximately 2.6 and 32.0 times more than that of TiO₂ and TiN alone, respectively. To explore the underlying photocatalytic mechanism, the crystal phase, morphology, light absorption, energy band structure, element composition, and electrochemical behavior of the composite material are characterized and analyzed. The results indicate that the superior activity is mainly caused by the in situ formation of plasmonic TiN and N-TiO₂ with intimate interface contact, which not only extends the spectral response range, but also accelerates the transfer and separation of the photoexcited hot charge carrier of TiN. The present study provides a fascinating approach to in situ forming nonmetallic plasmonic material/N-doped TiO₂ composite photocatalysts for high-efficiency water splitting.

关键词： photocatalytic H₂ evolution TiN/N-TiO₂ composite plasmonic effect in-situ nitridation