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3.833 Aktuelle Fachpublikationen zum Thema temperature

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Removal of hydrogen sulfide from natural gas by the graphene-nanotube hybrid structure: A molecular simulation

16.11.2014 | Author(s): Guangping Lei , Chao Liu , Hui Xie , Juanfang Liu, Chemical Physics Letters, 2014

Publication date: 25 November 2014 Source:Chemical Physics Letters, Volumes 616–617 Author(s): Guangping Lei , Chao Liu , Hui Xie , Juanfang Liu The molecular simulations are adopted to investigate the separation of H2S/CH4 mixture by the graphene-nanotube hybrid structure (GNHS). The ...

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Pairwise association of neopentane as a function of hydrostatic pressure

16.11.2014 | Author(s): Giuseppe Graziano, Chemical Physics Letters, 2014

Publication date: 25 November 2014 Source:Chemical Physics Letters, Volumes 616–617 Author(s): Giuseppe Graziano It is shown that the contact-minimum configuration of two neopentane molecules is favoured on increasing hydrostatic pressure over the range 1–4000atm, at room temperature, in ...

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Experimental Study of the Reaction of Isopropyl Nitrate with OH Radicals: Kinetics and Products

14.11.2014 | Manolis N. Romanias, Julien Morin, Yuri Bedjanian, International Journal of Chemical Kinetics, 2014

ABSTRACT The kinetics of the reaction of isopropyl nitrate (IPN) with OH radicals has been studied using a low‐pressure flow tube reactor coupled with a quadrupole mass spectrometer: OH + (CH3)2CHONO2 → products (2). The rate constant of the title reaction was determined using both the ...

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Raman and IR Studies of Pressure- and Temperature-Induced Phase Transitions in [(CH2)3NH2][Zn(HCOO)3]

14.11.2014 | Mirosław Mączka; Tercio Almeida da Silva; Waldeci Paraguassu; Maciej Ptak; Krzysztof Hermanowicz, Inorganic Chemistry, 2014

Temperature- and pressure-dependent studies of Raman and IR spectra have been performed on azetidinium zinc formate, [(CH2)3NH2][Zn(HCOO)3]. Vibrational spectra showed distinct anomalies in mode frequencies and bandwidths near 250 and 300 K, which were attributed to structural phase transitions ...

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Burst Strength of Tubing and Casing Based on Twin Shear Unified Strength Theory

14.11.2014 | Yuanhua Lin et al., PLoS ONE, 2014

by Yuanhua Lin, Kuanhai Deng, Yongxing Sun, Dezhi Zeng, Wanying Liu, Xiangwei Kong, Ambrish Singh The internal pressure strength of tubing and casing often cannot satisfy the design requirements in high pressure, high temperature and high H2S gas wells. Also, the practical safety coefficient of ...

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A Rod‐Packing Microporous Hydrogen‐Bonded Organic Framework for Highly Selective Separation of C2H2/CO2 at Room Temperature

13.11.2014 | Peng Li, Yabing He, Yunfeng Zhao, Linhong Weng, Hailong Wang, Rajamani Krishna, Hui Wu, Wei Zhou, Michael O'Keeffe, ..., Angewandte Chemie International Edition, 2014

Abstract Self‐assembly of a trigonal building subunit with diaminotriazines (DAT) functional groups leads to a unique rod‐packing 3D microporous hydrogen‐bonded organic framework (HOF‐3). This material shows permanent porosity and demonstrates highly selective separation of C2H2/CO2 at ambient ...

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Exploring the Free Energy and Conformational Landscape of tRNA at High Temperature and Pressure

13.11.2014 | Caroline Schuabb, Melanie Berghaus, Christopher Rosin, Roland Winter, ChemPhysChem, 2014

Abstract A combined temperature‐ and pressure‐dependent study was employed to reveal the conformational and free‐energy landscape of phenylalanine transfer RNA (tRNAPhe), a known model for RNA function, to elucidate the features that are essential in determining its stability. These studies ...

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Tuning the Morphology of GeS2 Hybrid Materials Using Ionic Liquids as Structuring Agents

13.11.2014 | Romain Mathiaud, Laurence Courthéoux, Gilles Silly, Hashim Albadri, Jocelyne Levillain, Annie‐Claude Gaumont, Michel ..., European Journal of Inorganic Chemistry, 2014

Abstract Control of the surface chemistry and morphology of chalcogenide materials, which are highly polarizable, is a very interesting challenge as it might lead to breakthroughs in various fields such as electrochemistry, catalysis, and gas‐phase separation. With this in mind, a new approach ...

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Replacement of CH4 in Hydrate in Porous Sediments with Liquid CO2 Injection

13.11.2014 | Yu Zhang, Li‐Jun Xiong, Xiao‐Sen Li, Zhao‐Yang Chen, Chun‐Gang Xu, Chemical Engineering & Technology, 2014

Abstract The dynamics of the replacement of CH4 in hydrate in porous sediments with liquid CO2 was investigated using a self‐developed experimental apparatus at different temperatures and initial pressures. The pressure increases steadily as the replacement reaction processes. The amount of ...

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Prediction of Air Specific Heat Ratios at Elevated Pressures Using a Novel Modeling Approach

13.11.2014 | Arash Kamari, Amir H. Mohammadi, Alireza Bahadori, Sohrab Zendehboudi, Chemical Engineering & Technology, 2014

Abstract An accurate and efficient model based on least‐squares support vector machines (LSSVM) is developed for the determination of air specific heat ratios at elevated pressures. Additionally, the coupled simulated annealing optimization strategy is used to calculate the optimal values of ...

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