Results 121 to 130 of about 785,332 (278)

CO2-ethanol interaction studied by vibrational spectroscopy in supercritical CO2

, 2004
Infrared spectroscopic measurements of the vOD stretching vibration of dilute deuterated ethanol in supercritical CO2 have been performed and analyzed, via a theoretical model and ab initio calculations, to better understand the ethanol-CO2 interaction..
BESNARD, Marcel, DANTEN, Yann, TASSAING, Thierry, LALANNE, Philippe, CANSELL, François, TUCKER, S. C.   +5 more
core   +1 more source

Numerical investigation of natural fracture activation and leakage risk during CO2 sequestration in depleted sandstone reservoirs

Deep Underground Science and Engineering, EarlyView.
This study investigates the hydro‐mechanical response and fracture evolution in depleted sandstone reservoirs during CO2 injection, considering both direct wellbore injection and hydraulic‐fracture‐assisted injection. The graphical abstract illustrates how CO2 injection induces dynamic stress redistribution, leading to natural fracture activation ...
Haiyang Wang, Chen Lu, Yufei Wang, Yichen Yang, Xu Su, Desheng Zhou, Qingqing Wang   +6 more
wiley   +1 more source

Recent Advances of Perovskite Oxides for Air Pollution Control Chemistry: The Closed Loop From Design to Application

EcoEnergy, EarlyView.
This review summarizes a descriptor‐guided framework for linking theoretical calculations, in situ/operando characterization, synthesis regulation, and application screening in functional materials. Emphasis is placed on dynamic structure–property relationships that enable low‐cost material design with enhanced activity, stability, and environmental ...
Yanyu Jin, Zezheng Tang, Hengfan Wu, Xing Yuan, Zongxiang Yang, Weijia An, Wenquan Cui, Xianguang Meng, Ying Xu, Junhua Li   +9 more
wiley   +1 more source

Extraction of vetiver (Chrysopogon zizanioides) root oil by supercritical CO2, pressurized-liquid, and ultrasound-assisted methods and modeling of supercritical extraction kinetics

, 2019
In this study, non-conventional methods of supercritical extraction with CO2 as well as with ethanol or ethyl acetate cosolvent, pressurized-liquid extraction (PLE), and ultrasound-assisted extraction (UAE) were employed to evaluate the extraction of ...
Klein, Elissandro Jair, Edson Antônio da Silva, da Silva, Edson Antonio, Camila da Silva, Lúcio Cardozo-Filho, Cardozo-Filho, Lucio, Santos, Katia Andressa, da Silva, Camila, Kátia Andressa Santos, Elissandro Jair Klein   +9 more
core   +1 more source

Enhanced Urea Oxidation Reaction by Mn‐Doped Nickel Hydroxide From Wastewater

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Mn incorporation modifies the hydroxide structure and modulates the electronic properties of the Ni centers, promoting the formation of catalytically active NiOOH species. Mn dopants induce a favorable electronic effect but do not directly participate in the UOR mechanism, enhancing the overall urea oxidation rate and resulting in increased hydrogen ...
Filippo Bano, Da Chen, Daniele Perilli, Samuele Zambonin, Dario Mosconi, Marco Roverso, Veronica Celorrio, Cristiana Di Valentin, Laura Calvillo   +8 more
wiley   +1 more source

Effect of natural fractures with different sizes on the development of supercritical CO2 fractures – A case study on Songliao Basin

Journal of CO2 Utilization
Shale reservoirs, characterized by their relatively low permeability and porosity, often employ hydraulic fracturing techniques to increase production during development.
Yu Suo, Xu Zhang, Yajie Tian, Chengchen Zhang, Xiaofei Fu, Zhejun Pan, Haiqing Jiang, Youqing Zhu, Xueliang Ma   +8 more
doaj   +1 more source

Efficient Synthesis of Cannabinoid Acids

European Journal of Organic Chemistry, EarlyView.
In this study, an alternative synthesis of cannabinoid acids was developed based on an O→C acyl rearrangement. Specifically, this strategy involved regioselective bromination followed by halogen–lithium exchange and intramolecular nucleophilic addition, which led to successful carboxylation.
Ryosuke Arai, Hikari Nishiguchi, Kayo Nakamura, Hiroko Abe, Akihiko Ishida, Manabu Tokeshi, Kyohei Higashi, Akiyoshi Saitoh, Hideyo Takahashi   +8 more
wiley   +1 more source

Microscopical and macroscopic structural damage evolution of low-rank coal by supercritical CO2 pulsation treatment

Meitan kexue jishu
In order to clarify the effect and mechanism of supercritical CO2 pulsation on low-rank coal, deep low-rank coal from the Aiwiergou Mine in Xinjiang was collected as the experimental object.
Jiajia LIU, Yuanlong LI, Jianliang GAO, Dan WANG, Yunlong ZHANG   +4 more
doaj   +1 more source

A Control Strategy With Hybrid Compressor Modeling for Electric Vehicle CO2 Heat Pump Systems

Energy Science &Engineering, EarlyView.
A hybrid PSO‐BP compressor sub‐model is developed and embedded in a MATLAB/Simscape physical model of a transcritical CO2 heat pump system for electric vehicles. Based on this high‐fidelity platform, a phased variable‐PTC cooperative control strategy is proposed and evaluated.
Jiaqi Dong, Jianguang Zhao, Tianhao Huang, Yufu Zheng, Jun Luo, Yijian He   +5 more
wiley   +1 more source

Rapid Determination of Microbial Quinones using Supercritical CO2 Extraction

Jurnal Rekayasa Kimia & Lingkungan, 2006
The supercritical CO2 extraction of microbial quinones from activated sludge samples obtained from various activated sludge was investigated and compared to the conventional method using organic solvent extraction.
Muhammad Faisal, Irvan Irvan, Yoichi Atsuta, Hiroyuki Daimon, Koichi Fujie   +4 more
doaj   +2 more sources