Results 51 to 60 of about 45,497 (307)

Theoretical studies of anharmonic effect analysis about the hydrogen abstraction reactions on n-heptane in combustion

open access: yesAIP Advances
The hydrogen evolution reaction of n-heptane is an important reaction of n-heptane combustion. The existing theoretical research on the n-heptane hydrogen evolution reaction has low accuracy; the anharmonic effect and tunneling effect are not considered,
Yufan Du   +4 more
doaj   +1 more source

Theoretical studies on the all-anti zigzag geometries of perfluoro-n-alkyl chains [PDF]

open access: yes, 2010
Theoretical investigations were conducted on the gas phase all-anti zigzag geometries of C~3~ through C~7~ perfluoro-n-alkanes and the perfluoro-n-octanoate anion using various semiempirical, density functional theory, and composite method approaches ...
Kaya Forest, Sierra Rayne
core   +2 more sources

Integrated Lead/Iodine Management for Sustainable Perovskite Solar Modules

open access: yesAdvanced Materials, EarlyView.
Perovskite solar modules face environmental risks from lead and iodine leakage. A dual‐function adsorbent—porphyrin‐modified whitlockite nanocomposites—effectively captures iodine and Pb2+, even under severe damage. Combined with a semi‐closed recycling process, it recovers 96.9% high‐purity PbI2 and reduces residual Pb2+ to <10 ppb, offering an ...
Guo‐Bin Xiao   +6 more
wiley   +1 more source

Synthesis of bimetallic Ni-Pt/SAPO-11 composite and the catalytic application in n-heptane hydroisomerization

open access: yesMaterials Research Express
The monometallic Pt/SAPO-11 and bimetallic Ni-Pt/SAPO-11 catalysts were synthesized with Instant Exactness Synthesis (IES) method and characterized by XRD, nitrogen adsorption–desorption, SEM, TEM, FT-IR, Py-IR, NH _3 -TPD and XPS, and their properties ...
Zhen Jiang   +6 more
doaj   +1 more source

Experimental Investigation of Performance Combustion and Emission Characteristics in an HCCI Engine Fuelled Isopropanol and Heptane Fuel Mixtures

open access: yesGazi Üniversitesi Fen Bilimleri Dergisi, 2019
In this study, the effect of isopropanol on combustion and exhaust emissions was investigated experimentally in a single cylinder HCCI engine with port injection system.
Alper CALAM, Bilal AYDOĞAN
doaj   +1 more source

Dynamical system analysis of ignition phenomena using the tangential stretching rate concept [PDF]

open access: yes, 2015
We analyze ignition phenomena by resorting to the stretching rate concept formerly introduced in the study of dynamical systems. We construct a Tangential Stretching Rate (TSR) parameter by combining the concepts of stretching rate with the decomposition
Ciottoli, Pietro Paolo   +4 more
core   +1 more source

Tuning Pore Size in Porous Graphene Membrane for O2/N2 Separation

open access: yesAdvanced Materials, EarlyView.
Single‐layer graphene membranes featuring N‐functionalized, 0D pores offer a promising platform for O2/N2 separation. The heterogeneity of functional groups at the pore edge is dynamically tunable, enabling precise tuning of the pore limiting diameter and gas transport.
Kuang‐Jung Hsu   +5 more
wiley   +1 more source

SEPARATION OF p-AMINOBENZOIC ACID BY REACTIVE EXTRACTION. 1. MECHANISM AND INFLUENCING FACTORS [PDF]

open access: yes, 2008
The comparative study on the reactive extraction of p-aminobenzoic acid with Amberlite LA-2 and D2EHPA in two solvents with different polarity (n-heptane and dichloromethane) indicated that the extractant type and solvent polarity control the extraction ...
ANCA-IRINA GALACTION   +2 more
core   +1 more source

Light Switchable Ionic Conductivity of Arylazopyrazole Modified Polysiloxanes

open access: yesAdvanced Materials Technologies, EarlyView.
We present a polysiloxane functionalized with a novel arylazopyrazole dye that undergoes reversible photoisomerization. Upon lithium bis(trifluoromethanesulfonyl)imide addition and UV irradiation, the polymer exhibits a shift in tan(d) toward higher frequencies and enhanced ionic conductivity.
Malte S. Beccard   +7 more
wiley   +1 more source

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