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Characteristics of Three-Dimensional Pore-Fracture Network Development and Enhanced Seepage Heat Transfer in Hot Dry Rock Stimulated by Temperature Shock Effects.
ACS Omega
December 2024
State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
Hot dry rock (HDR) geothermal is a sustainable and clean energy source. However, its development progress is hindered by creating seepage channels in deep reservoirs with low porosity and permeability. Traditional hydraulic fracturing techniques are ineffective for enhancing the permeability of these high-strength reservoirs.
View Article and Find Full Text PDFCleaning methods for biosafety cabinet to eliminate residual mycoplasmas, viruses, and endotoxins after changeover.
Regen Ther
March 2025
Center for Stem Cell and Regenerative Medicine, Institute of Science Tokyo, 1-5-45, Bunkyo-ku, Yushima, Tokyo 113-8519, Japan.
Introduction: Cell-processing operations can potentially contaminate biosafety cabinets, which should be maintained sterile. However, unintended contamination can occur owing to the presence of viruses, mycoplasmas, and bacteria in the raw materials. Moreover, although several methods for expunging these contaminants have been proposed, an optimal method has not yet been determined.
View Article and Find Full Text PDFOverlooked Impact of Moisture on the Stability of Printing Ink and Its Impact on Recycled Low-Density Polyethylene (LDPE) Quality.
Polymers (Basel)
November 2024
Circular Resource Engineering and Management (CREM), Hamburg University of Technology (TUHH), Blohm Str. 15, 21079 Hamburg, Germany.
Printing inks, composed of binders, pigments, and additives, are essential components in plastic packaging but complicate recycling due to plastic contamination and degradation. While polyolefins are resistant to hydrolytic degradation, moisture generated from upstream cleaning processes, which is often ignored, can accelerate the degradation of ink binders, affecting the recyclate quality. This study has examined the impact of 3 wt.
View Article and Find Full Text PDFBonding of Polyethylenimine in Covalent Organic Frameworks for CO Capture from Air.
J Am Chem Soc
December 2024
Department of Chemistry and Kavli Energy NanoScience Institute, University of California, Berkeley, California 94720, United States.
We have developed a polyethylenimine-functionalized covalent organic framework (COF) for capturing CO from the air. It was synthesized by the crystallization of an imine-linked COF, termed imine-COF-709, followed by linkage oxidation and polyamine installation through aromatic nucleophilic substitution. The chemistry of linkage oxidation and amine installation was fully characterized through Fourier transform infrared spectroscopy, elemental analysis, and solid-state nuclear magnetic resonance (ssNMR) spectroscopy.
View Article and Find Full Text PDFTheoretical insights into the effect of metal co-substituted CeO(111) surfaces on oxygen vacancy formation and chemical looping CO assisted CH conversion to synthesis gas.
Phys Chem Chem Phys
December 2024
Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China.
Article Synopsis
- The study uses density functional theory (DFT) to examine how low oxygen vacancy formation energy affects the catalytic performance of chemical looping dry reforming of methane (CL-DRM) when metal ions Zn and Nd are co-substituted on CeO(111) surfaces.
- Results show that the co-substituted surfaces have a very low oxygen vacancy formation energy (-2.05 eV), enhancing the CH conversion process compared to pristine surfaces, with the rate-limiting step being the dehydrogenation of CH.
- However, while the co-substituted surfaces promote better reaction performance, high energy is required for syngas desorption and CO selectivity is reduced, indicating a balance is needed to prevent excessive
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