Results 101 to 110 of about 4,245,541 (321)

Integrating process design and control: An application of optimal control to chemical processes [PDF]

, 2008
In this paper, the optimal design of process systems generically used in chemical industries is studied. The closely coupled nature of optimal design specification of the equipment, the determination of the optimal process parameters in steady-state ...
Athans, Bansal, Douglas, F. Szigeti, Georgiadis, Gmehling, Grossmann, J.M. Reneaume, Kreindler, Luyben, Lygeros, M. Meyer, M. Miranda, Mohideen, Perkins, Pontryagin, Ross, Sakizlis, Schmid, Silverstein, Söylemez, Taylor, X. Meyer, Zhang   +23 more
core   +2 more sources

Impact of river management history on the community structure, species composition and nutrient status in the Rhine alluvial hardwood forest [PDF]

, 1998
The present-day Rhine alluvial hardwood forest (Querco-Ulmetum minoris, Issler 24) in the upper Rhine valley (France/Germany) is comprised of three vegetation units, one still flooded by calm waters (F) and the two others unflooded, one for 30 years ...
Sanchez-Pérez, José-Miguel, Schmitt, Diane, Schnitzler, Annik, Trémolières, Michèle   +3 more
core   +2 more sources

Early warning methods of chemical agent channeling in polymer–surfactant flooding reservoirs

Energy Science & Engineering
In the chemical flooding process, the premature breakthrough of chemical agents in production wells results in a large waste of chemical agents and increases the volume and processing difficulty of the produced fluids.
Qingjun Du, Dong Zhao, Jintao Wu, Jian Hou, Zhijie Wei, Lina Shi, Kang Zhou, Haoyu Zheng, Jian Zhang, Yongge Liu   +9 more
doaj   +1 more source

Study on Mechanism of Surfactant Adsorption at Oil–Water Interface and Wettability Alteration on Oil-Wet Rock Surface

Molecules
With the depletion of conventional light crude oil reserves in China, the demand for heavy oil exploitation has grown, highlighting the increasing significance of enhanced heavy oil recovery.
Xinyu Tang, Yaoyao Tong, Yuhui Zhang, Pujiang Yang, Chuangye Wang, Jinhe Liu   +5 more
doaj   +1 more source

Study of the mechanisms of streamline-adjustment-assisted heterogeneous combination flooding for enhanced oil recovery for post-polymer-flooded reservoirs

Petroleum Science, 2019
Streamline-adjustment-assisted heterogeneous combination flooding is a new technology for enhanced oil recovery for post-polymer-flooded reservoirs.
Qing-Jun Du, Guang-Ming Pan, Jian Hou, Lan-Lei Guo, Rong-Rong Wang, Zhi-Zeng Xia, Kang Zhou   +6 more
doaj   +1 more source

Does a Morphotropic Phase Boundary Exist in ZrxHf1‐xO2‐Based Thin Films?

Advanced Functional Materials, EarlyView.
This study investigates 6 nm zirconium‐rich hafnium‐zirconium oxide thin–film metal–insulator–metal capacitors using a combination of experimental methods and machine learning–based molecular dynamics simulations to provide insight into the physical mechanisms that enhance the dielectric constant near 0 V and attribute it to the field‐induced ...
Pramoda Vishnumurthy, Richard Ganser, Dong‐Gyu Kim, Intak Jeon, Chang Hwa Jung, Hanjin Lim, Thomas Mikolajick, Susan Trolier‐McKinstry, Alfred Kersch, Uwe Schroeder   +9 more
wiley   +1 more source

Study on formation and migration of emulsions in porous media during chemical flooding of heavy oil

Youqi dizhi yu caishoulu
Emulsification is one of the main mechanisms of chemical flooding to enhance oil recovery in heavy oil reservoirs. The emulsification of heavy oil in porous media is closely related to reservoir temperature and oil-displacing agent concentration.
MA Tao, XIAO Pufu, TANG Liang, LUN Zengmin, TANG Yongqiang, ZHOU Bing   +5 more
doaj   +1 more source

Infrared Nanocrystals for Space Application: Hardness to Irradiations

Advanced Functional Materials, EarlyView.
This article investigates infrared HgTe nanocrystals under X‐ray and ion irradiation, revealing remarkable radiation hardness. It uncovers distinct degradation mechanisms and shows that the nanomaterial outperforms integrated electronics. The results position colloidal nanocrystals as promising candidates for resilient space and harsh‐environment ...
Alexandre Neyret, Dario Mastrippolito, Bingbing Xia, Adrien Khalili, Maxime Lebreton, Giorgia Strobbia, Albin Colle, Marco Paye, Mariarosa Cavallo, Erwan Bossavit, Claire Abadie, Yoann Prado, Debora Pierucci, Victor Parahyba, Francois Coursaget, David Darson, Emrick Briand, Ian Vickridge, Stephane Demiguel, Sebastien Massenot, Jean‐Marc Belloir, Vincent Goiffon, Emmanuel Lhuillier   +22 more
wiley   +1 more source

Numerical Validation of Chemical Compositional Model for Wettability Alteration Processes

Open Engineering, 2017
Chemical compositional simulation of enhanced oil recovery and surfactant enhanced aquifer remediation processes is a complex task that involves solving dozens of equations for all grid blocks representing a reservoir.
Bekbauov Bakhbergen, Berdyshev Abdumauvlen, Baishemirov Zharasbek, Bau Domenico   +3 more
doaj   +1 more source

Study on Technical and Economic Limit of Layer-Recombination and Well Pattern Adjustment

Improved Oil and Gas Recovery, 2020
Three types of displacement mode coexist in NS Development Area at present, including water flooding, polymer flooding, alkaline surfactant polymer flooding.
Qingjie Gu
doaj   +1 more source