B919977b 3102..3107
نویسندگان
چکیده
An alumina-supported nickel catalyst has been used to effect the ‘dry’ reforming of methane, using CO2 as the oxidant. After 6 hours on-stream, reaction was stopped and the sample analysed by inelastic neutron scattering (INS). The INS spectrum reveals the presence of hydrocarbonaceous species as well as hydroxyl species present at the catalyst surface. Through the use of appropriate reference compounds, calibration procedures have been developed to determine the concentration of the retained hydrocarbon and hydroxyl moieties. Ancillary temperature programmed oxidation experiments establish the total carbon content. This approach not only enables the extent of overall carbon laydown to be determined but it also identifies the degree to which hydrogen is associated with carbon and oxygen atoms. The methodology described is generic and should be applicable to a wide number of heterogeneously catalysed systems.
منابع مشابه
HANSpeller: A Unified Framework for Chinese Spelling Correction
Increased interest in China from foreigners has led to a corresponding interest in the study of Chinese. However, the learning of Chinese by non-native speakers will encounter many difficulties, Chinese spelling check techniques for Chinese as a Foreign Language(CFL) learners is highly desirable. This paper presents our work on the SIGHAN-2015 Chinese Spelling Check task. The task focuses on sp...
متن کاملPhotonic Technologies for Quantum Information Processing
1Departments of Electrical and Computer Engineering, and Physics and Astronomy, Northwestern University, Evanston, Illinois 60208-3118, USA. E-mail: [email protected] 2Department of Physics, University of Illinois, Urbana-Champaign, Illinois 61801-3080, USA. 3Optical Technology Div., NIST, Gaithersburg, Maryland 20899-8441, USA. 4Quantum Electrical Metrology Division, NIST, Boulder, Colar...
متن کاملAnalysis of Browsing Behaviors with Ant Colony Clustering Algorithm
The characteristics of users' browsing behaviors on websites can be used to analyze system performance as well as network communication, understand users’ reaction and motivation, and build adaptive websites. However, the motivation, requirement and experience of users may dynamically change, which cause difficulty in exactly refining a stable behavior pattern and describing their shifted inter...
متن کاملLearning Discriminative Visual Codebook for Human Action Recognition
This paper explores how to improve BOW model for human action recognition in real environment. Traditional codebook learning uses single appearance based local features, thus spatial and temporal correlations of local features are ignored. This leads to a considerable amount of mismatch between sample vectors and noisy visual words resulted from background clutters. To improve the performance o...
متن کامل