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 1466

会议视频 30

会议信息 4

年份

2024 4

2023 200

2022 202

2021 233

2020 120

2019 68

2018 47

2017 71

2016 58

2015 66

2014 58

2013 58

2012 39

2011 33

2010 61

2009 35

2008 34

2007 43

2006 6

2005 7

展开︾

关键词

SARS-CoV-2 7

微波散射计 5

碳中和 5

COVID-19 4

Cu(In 4

HY-2 4

2019 3

2型糖尿病 3

GPS 3

Ga)Se₂ 3

HY-2 卫星 3

HY-2A卫星 3

代谢与免疫 3

光催化 3

工程管理 3

微波辐射计 3

营养健康 3

3D打印 2

CCS 2

展开︾

检索范围：

排序：展示方式：

Bamboo-like -doped carbon nanotubes encapsulating M(Co, Fe)-Ni alloy for electrochemical production ofsyngas with potential-independent CO/H ratios

《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

固体氧化物电解池共电解H₂O/CO₂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 H₂O/CO₂共电解合成气电解效率水电解

HTML PDF 收藏

Impacts of CO2 and H2S on the risk of hydrate formation during pipeline transport of natural gas

Solomon A. Aromada, Bjørn Kvamme

《化学科学与工程前沿（英文）》 2019年第13卷第3期页码 616-627 doi: 10.1007/s11705-019-1795-2

摘要： Evaluation of maximum content of water in natural gas before water condenses out at a given temperature and pressure is the initial step in hydrate risk analysis during pipeline transport of natural gas. The impacts of CO and H S in natural gas on the maximum mole-fractions of water that can be tolerated during pipeline transport without the risk of hydrate nucleation has been studied using our novel thermodynamic scheme. Troll gas from the North Sea is used as a reference case, it contains very negligible amount of CO and no H S. Varying mole-fractions of CO and H S were introduced into the Troll gas, and the effects these inorganic impurities on the water tolerance of the system were evaluated. It is observed that CO does not cause any distinguishable impact on water tolerance of the system, but H S does. Water tolerance decreases with increase in concentration of H S. The impact of ethane on the system was also investigated. The maximum mole-fraction of water permitted in the gas to ensure prevention of hydrate formation also decreases with increase in the concentration of C H like H S. H S has the most impact, it tolerates the least amount of water among the components studied.

关键词： hydrate hydrogen Sulphide CO₂ dew point pipeline

HTML PDF 收藏

Nickel(II) ion-intercalated MXene membranes for enhanced H₂/CO₂ 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

Co anchored on porphyrinic triazine-based frameworks with excellent biocompatibility for conversion ofCO in H-mediated microbial electrosynthesis

《化学科学与工程前沿（英文）》 2022年第16卷第12期页码 1761-1771 doi: 10.1007/s11705-022-2195-6

摘要： Microbial electrosynthesis is a promising alternative to directly convert CO₂ into long-chain compounds by coupling inorganic electrocatalysis with biosynthetic systems. However, problems arose that the conventional electrocatalysts for hydrogen evolution may produce extensive by-products of reactive oxygen species and cause severe metal leaching, both of which induce strong toxicity toward microorganisms. Moreover, poor stability of electrocatalysts cannot be qualified for long-term operation. These problems may result in poor biocompatibility between electrocatalysts and microorganisms. To solve the bottleneck problem, Co anchored on porphyrinic triazine-based frameworks was synthesized as the electrocatalyst for hydrogen evolution and further coupled with Cupriavidus necator H16. It showed high selectivity for a four-electron pathway of oxygen reduction reaction and low production of reactive oxygen species, owing to the synergistic effect of Co–N_x modulating the charge distribution and adsorption energy of intermediates. Additionally, low metal leaching and excellent stability were observed, which may be attributed to low content of Co and the stabilizing effect of metalloporphyrins. Hence, the electrocatalyst exhibited excellent biocompatibility. Finally, the microbial electrosynthesis system equipped with the electrocatalyst successfully converted CO₂ to poly-β-hydroxybutyrate. This work drew up a novel strategy for enhancing the biocompatibility of electrocatalysts in microbial electrosynthesis system.

关键词： microbial electrosynthesis hydrogen evolution reaction metalloporphyrins biocompatibility CO₂ conversion

HTML PDF 收藏

山西沁水盆地柿庄北区块3#煤层注入埋藏CO₂提高煤层气采收率试验和评价

叶建平,张兵,Sam Wong

《中国工程科学》 2012年第14卷第2期页码 38-44

摘要：

对沁水盆地南部柿庄北区块进行了深煤层注入地质和工程评价，认为柿庄北区块适合进行深煤层注入CO2开采煤层气技术的应用；通过SX-001井的微型先导性试验通过现场试验，注入CO2后SX-001井的产气量是注入前的2.45倍；在小于煤岩破裂压力的条件下，每天注入20 t的CO2能够实现顺利注入，并且压力上升速度较慢；注入CO2后，煤岩发生膨胀，局部煤层的渗透率降低，排采一段时间后恢复；在目的煤层中注入的CO2的影响范围内，烃类气体总的置换效率达到14.18 cm3/g。该试验成果证明柿庄北区块通过注入CO2开采煤层气实现了CO2的埋藏，提高了煤层气井的采收率。

关键词：山西沁水盆地注入CO₂ 煤层气采收率

HTML PDF 收藏

VALORIZATION OF BIOGAS THROUGH SIMULTANEOUS CO AND HS REMOVAL BY RENEWABLE AQUEOUS AMMONIA SOLUTION IN

《农业科学与工程前沿（英文）》 2023年第10卷第3期页码 468-478 doi: 10.15302/J-FASE-2022473

摘要：

● Simultaneous H₂S and CO₂ removal from biogas is studied.

关键词： biomethane biogas purification CO₂ removal H₂S removal membrane absorption

HTML PDF 收藏

普光气田地面集输系统的内腐蚀控制与监测

欧莉,李时杰,苏国丰

《中国工程科学》 2010年第12卷第10期页码 70-75

摘要：

分析了高含H₂S / CO₂气田的腐蚀特征，探讨了在普光气田开发建设同期模拟普光集输工况开展的腐蚀性研究与成果

关键词：普光酸性气田 H2S CO2 湿气输送缓蚀剂腐蚀监测

HTML PDF 收藏

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

《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

Preparation of Cu/ZrO

Xinmei LIU, Shaofen BAI, Huidong ZHUANG, Zifeng YAN

《化学科学与工程前沿（英文）》 2012年第6卷第1期页码 47-52 doi: 10.1007/s11705-011-1170-4

摘要： Cu/ZrO catalysts for methanol synthesis from CO /H were respectively prepared by deposition coprecipitation (DP) and solid state reaction (SR) methods. There is an intimate interaction between copper and zirconia, which strongly affects the reduction property and catalytic performance of the catalysts. The stronger the interaction, the lower the reduction temperature and the better the performance of the catalysts. Surface area, pore structure and crystal structure of the catalysts are mainly controlled by preparation methods and alkalinity of synthesis system. The conversion of CO and selectivity of methanol are higher for DP catalysts than for SP catalysts.

关键词： Cu/ZrO₂ methanol synthesis deposition coprecipitation solid state reaction CO₂/H₂

HTML PDF 收藏

Major bridge projects——a multi-disciplinary approach

Klaus H. OSTENFELD, Erik Y. ANDERSEN

《结构与土木工程前沿（英文）》 2011年第5卷第4期页码 479-495 doi: 10.1007/s11709-011-0137-3

摘要： Modern bridge building is much more than concrete, steel and money. The overall socioeconomic impact, influence on people migration, traffic, use of primary materials, safety of construction impact on the environment, energy, risk scenarios, health, and most relevant now: climate and CO emissions, are among the parameters which enter into the decision process at the overall holistic conceptual level, the more detailed level of selection of bridge sites, and selection of bridge types as well as construction methods and selection of materials and products. The paper illustrates these dilemmas and illustrates by specific examples how this complicated decision process can be managed and structured in order to arrive at an overall satisfactory solution for design, construction and maintenance throughout the lifetime (life cycle) to these sometimes contradictory parameters and requirements.

关键词： bridges materials climate risk safety environment socioeconomics traffic CO₂ energy life cycle society aesthetics

HTML PDF 收藏

Sulfur and carbon co-doped g-CN microtubes with enhanced photocatalytic H production activity

《能源前沿（英文）》 doi: 10.1007/s11708-023-0899-z

摘要： Metal-free graphitic carbon nitride (g-C₃N₄) has captured significant attention as a low-cost and efficient hydrogen production photocatalyst through. Effectively regulating the microstructure and accelerating the separation of photogenerated carriers remain crucial strategies for promoting the photocatalytic performance of this material. Herein, a novel sulfur–carbon co-doped g-C₃N₄ (SCCN) hierarchical microtubules filled with abundant nanosheets inside by thermal polymerization is reported. Numerous nanosheets create abundant pores and cavities inside the SCCN microtubes, thereby increasing the specific surface area of g-C₃N₄ and providing sufficient reactant attachment sites. Besides, the hierarchical structure of SCCN microtubules strengthens the reflection and scattering of light, and the utilization of visible light is favorably affected. More importantly, co-doping S and C has greatly improved the photocatalytic performance of graphitic carbon nitride, optimized the band gap structure and enhanced the photogenerated carrier splitting. Consequently, the SCCN exhibits a remarkable photocatalytic H₂ evolution rate of 4868 μmol/(g·h). This work demonstrates the potential of multi-nonmetal doped g-C₃N₄ as the ideal photocatalyst for H₂ evolution.

关键词： carbon nitride photocatalysis hydrogen production

HTML PDF 收藏

CO₂ methanation and co-methanation of CO and CO₂ over Mn-promoted Ni/Al₂

Kechao Zhao,Zhenhua Li,Li Bian

《化学科学与工程前沿（英文）》 2016年第10卷第2期页码 273-280 doi: 10.1007/s11705-016-1563-5

摘要： A series of Mn-promoted 15 wt-% Ni/Al O catalysts were prepared by an incipient wetness impregnation method. The effect of the Mn content on the activity of the Ni/Al O catalysts for CO methanation and the co-methanation of CO and CO in a fixed-bed reactor was investigated. The catalysts were characterized by N physisorption, hydrogen temperature-programmed reduction and desorption, carbon dioxide temperature-programmed desorption, X-ray diffraction and high-resolution transmission electron microscopy. The presence of Mn increased the number of CO adsorption sites and inhibited Ni particle agglomeration due to improved Ni dispersion and weakened interactions between the nickel species and the support. The Mn-promoted 15 wt-% Ni/Al O catalysts had improved CO methanation activity especially at low temperatures (250 to 400 °C). The Mn content was varied from 0.86% to 2.54% and the best CO conversion was achieved with the 1.71Mn-Ni/Al O catalyst. The co-methanation tests on the 1.71Mn-Ni/Al O catalyst indicated that adding Mn markedly enhanced the CO methanation activity especially at low temperatures but it had little influence on the CO methanation performance. CO methanation was more sensitive to the reaction temperature and the space velocity than the CO methanation in the co-methanation process.

关键词： Mn promotion nickel catalysts CO₂ methanation co-methanation of CO and CO₂

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

以净零排放为目标的封存驱动型CO₂提高采收率方法 Article

刘月亮, 芮振华

《工程（英文）》 2022年第18卷第11期页码 79-87 doi: 10.1016/j.eng.2022.02.010

摘要：可通过驱油过程将CO₂封存在油藏地质体中，因此，CO₂驱油与封存被视为降低CO₂排放的重要手段之一。本研究提出了一种新型的CO₂提高采收率（EOR）方法，即封存驱动型CO₂提高采收率，其主要目标是通过在油藏中封存尽可能多的CO₂来实现CO结果表明，DME可提高CO₂在原油中的溶解度，有利于CO₂的溶解封存；可抑制因CO₂的抽提作用造成的原油轻质组分“逃逸&rdquo封存驱动型CO₂ EOR方法在提高波及效率方面优于传统的CO₂ EOR，尤其是在采油后期更为明显；同时，封存驱动型CO₂ EOR比传统的此外，通过封存驱动型CO₂ EOR封存的CO₂量远超采出原油燃烧产生的碳排放总量。

关键词： CO₂ EOR CO₂净排放量二甲醚封存驱动型CO₂ EOR CO₂封存