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2.603 Aktuelle Fachpublikationen zum Thema temperature

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CO2 Capture Using Monoethanolamine in a Bubble‐Column Scrubber

12.12.2014 | Pao‐Chi Chen, Yi Xin Luo, Pao Wein Cai, Chemical Engineering & Technology, 2014

Abstract A continuous bubble‐column scrubber, capturing CO2 gas by monoethanolamine (MEA) solution in a pH‐stat operation, is used to search for optimum process parameters by means of the Taguchi method. The process variables are the pH of the solution, gas flow rate, concentration of CO2 gas, ...

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Continuous Operation of a 10 kWth Chemical Looping Integrated Fluidized Bed Reactor for Gasifying Biomass Using an Iron-Based Oxygen Carrier

12.12.2014 | Guoqiang Wei; Fang He; Zhen Huang; Anqing Zheng; Kun Zhao; Haibin Li, Energy & Fuels, 2014

Chemical looping gasification (CLG) was investigated in a 10 kWth interconnected fluidized bed reactor with Fe2O3/Al2O3 as oxygen carriers (OC) and pine sawdust as fuel. The effects of the operation temperatures and sawdust feeding rate on the gas composition, cold gas efficiency, and carbon ...

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Steam Hydration of Calcium Oxide for Solid Sorbent Based CO2 Capture: Effects of Sintering and Fluidized Bed Reactor Behavior

12.12.2014 | Alan Wang; Niranjani Deshpande; L.-S. Fan, Energy & Fuels, 2014

This study reports on the hydration characteristics in the three-step carbonation–calcination reaction (CCR) process with intermediate steam hydration. Specifically, experimental results of sorbent reactivation in a fluidized bed steam hydration reactor are presented along with the effect of the ...

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Fuel Gas Hydrate Formation Probability Distributions on Quasi-free Water Droplets

11.12.2014 | Nobuo Maeda, Energy & Fuels, 2014

We systematically studied the formation probability distributions of methane–propane (C1/C3) mixed gas hydrates on a quasi-free water droplet as a function of the mixed gas pressure of up to 14 MPa. It was found that the maximum achievable subcooling temperature (ΔT) distributions of C1/C3 mixed ...

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Gas Production from Methane Hydrates in a Dual Wellbore System

11.12.2014 | Matilda Loh; Jun Lin Too; Simon Falser; Praveen Linga; Boo Cheong Khoo; Andrew Palmer, Energy & Fuels, 2014

In a previous study using a single wellbore production system, it was demonstrated that a combination of depressurization and wellbore heating is more efficient than depressurization alone, where the endothermic dissociation process rapidly consumes the specific heat of the formation, leading to ...

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Chemical‐Looping Reforming of Methane Using Iron Based Oxygen Carrier Modified with Low Content Nickel

09.12.2014 | Guoqiang Wei, Fang He, Zhen Huang, Kun Zhao, Anqing Zheng, Haibin Li, Chinese Journal of Chemistry, 2014

Abstract Fe2O3/Al2O3 and Fe2O3/Al2O3 modified by low content of Ni (below 2% in weight) oxygen carriers were prepared by mechanical mixing and impregnation method. The synthesized oxygen carriers were characterized by means of X‐ray diffraction (XRD), X‐ray fluorescence (XRF), scanning ...

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Spin–Orbit Interaction in a Two-Dimensional Hole Gas at the Surface of Hydrogenated Diamond

08.12.2014 | Mark T. Edmonds; Laurens H. Willems van Beveren; Oleh Klochan; Jiri Cervenka; Kumar Ganesan; Steven Prawer; Lothar L ..., Nano Letters, 2014

Hydrogenated diamond possesses a unique surface conductivity as a result of transfer doping by surface acceptors. Yet, despite being extensively studied for the past two decades, little is known about the system at low temperature, particularly whether a two-dimensional hole gas forms at the ...

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High Performance Three‐Dimensional Chemical Sensor Platform Using Reduced Graphene Oxide Formed on High Aspect‐Ratio Micro‐Pillars

05.12.2014 | Le Thai Duy, Duck‐Jin Kim, Tran Quang Trung, Vinh Quang Dang, Bo‐Yeong Kim, Hock Key Moon, Nae‐Eung Lee, Advanced Functional Materials, 2014

The sensing performance of chemical sensors can be achieved not only by modification or hybridization of sensing materials but also through new design in device geometry. The performance of a chemical sensing device can be enhenced from a simple three‐dimensional (3D) chemiresistor‐based gas ...

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Measuring oxygen yields of a thermal conversion/elemental analyzer‐isotope ratio mass spectrometer for organic and inorganic materials through injection of CO

05.12.2014 | Xijie Yin, Zhigang Chen, Journal of Mass Spectrometry, 2014

The thermal conversion/elemental analyzer‐isotope ratio mass spectrometer (TC/EA‐IRMS) is widely used to measure the δ18O value of various substances. A premise for accurate δ18O measurement is that the oxygen in the sample can be converted into carbon monoxide (CO) quantitatively or at least ...

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Emission of Phthalates and Phthalate Alternatives from Vinyl Flooring and Crib Mattress Covers: The Influence of Temperature

05.12.2014 | Yirui Liang; Ying Xu, Environmental Science & Technology, 2014

Emissions of phthalates and phthalate alternatives from vinyl flooring and crib mattress covers were measured in a specially designed chamber. The gas-phase concentrations versus time were measured at four different temperatures, that is, 25, 36, 45, and 55 °C. The key parameter that controls the ...

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