Blar i Institutt for kjemisk prosessteknologi på forfatter "Chen, De"
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Influence of Carbon Support on Electronic Structure and Catalytic Activity of Pt Catalysts: Binding to the CO Molecule
Mahmoodinia, Mehdi; Åstrand, Per-Olof; Chen, De (Journal article, 2016)Single-atom catalysts, especially with single Pt atoms, exhibit potentially improved catalytic activity as compared to metal clusters and metal surfaces. Here, the atop and bridged bondings of the CO molecule on the Pt/C ... -
Inhibiting carbon growth at the initial stage of metal dusting corrosion of high temperature alloys
Guo, Xiaoyang (Doctoral theses at NTNU;2020:212, Doctoral thesis, 2020)Metal dusting corrosion is a high temperature degradation phenomenon affecting Fe-, Ni- and Co- based alloys when exposed to strongly carburizing gases (carbon activity ac > 1) at elevated temperatures (> 400˚C). The alloy ... -
Insight into Size- and Metal-Dependent Activity and the Mechanism for Steam Methane Re-forming in Nanocatalysis
Wang, Yalan; Xiao, Ling; Qi, Yanying; Yang, Jia; Zhu, Yi-An; Chen, De (Peer reviewed; Journal article, 2020)Systematic and in-depth understanding of size- and metal-dependent activity plays a pivotal role in nanocatalysis for rational design of highly efficient catalysts. Herein, we report an approach combining microkinetic ... -
Insights into Activated Carbon-Supported Platinum Catalysts for Base-Free Oxidation of Glycerol
Lei, Jiaqi; Dong, Hua; Duan, Xuezhi; Chen, Wenyao; Qian, Gang; Chen, De; Zhou, Xinggui (Journal article; Peer reviewed, 2016)Two kinds of activated carbon (AC)-supported Pt catalysts with similar particle sizes were respectively synthesized using the polyol method and incipient wetness impregnation method, and then tested for glycerol oxidation ... -
Insights into hydrogen transport behavior on perovskite surfaces: Transition from the Grotthuss mechanism to the “vehicle” mechanism
Li, Qian; Yin, Qiang; Zheng, Ya-Shan; Sui, Zhi Jun; Zhou, Xinggui; Chen, De; Zhu, Yi-an (Journal article; Peer reviewed, 2019)Hydrogen transport on transition-metal oxides is a shared process in many important physical and chemical changes of interest. In this work, DFT + U calculations have been carried out to explore the mechanism for hydrogen ... -
Insights into size-dependent activity and active sites of Au nanoparticles supported on TS-1 for propene epoxidation with H2 and O2
Feng, Xiang; Duan, Xuezhi; Qian, Gang; Zhou, Xinggui; Chen, De; Yuan, Weikang (Journal article; Peer reviewed, 2014)Propene epoxidation with H2/O2 is a typical structure-sensitive reaction. For a given support containing tetra-coordinated Ti species such as TS-1, the catalytic activity is greatly influenced by supported Au nanoparticle ... -
Insights into the synergy between recyclable magnetic Fe 3 O 4 and zeolite for catalytic aquathermolysis of heavy crude oil
Lin, Dong; Feng, Xiang; Wu, Yining; Ding, Baodong; Lu, Teng; Liu, Yibin; Chen, Xiaobo; Chen, De; Yang, Chaohe (Journal article; Peer reviewed, 2018)Understanding the synergy between metal and zeolite for catalytic aquathermolysis harbours tremendous scientific and industrial importance. Herein, HZSM-5 is used as a model zeolite due to uniform physico-chemical structure, ... -
Investigation of C1+C1 coupling reactions in cobalt-catalyzed Fischer-Tropsch synthesis by a combined DFT and kinetic isotope study
Qi, Yanying; Yang, Jia; Holmen, Anders; Chen, De (Journal article; Peer reviewed, 2019)Understanding the chain growth mechanism is of vital importance for the development of catalysts with enhanced selectivity towards long-chain products in cobalt-catalyzed Fischer-Tropsch synthesis. Herein, we discriminate ... -
Investigation of metal dusting corrosion process over UNS N08800 alloy
Guo, Xiaoyang; Panditha Vidana, Daham Sanjaya Gunawardana; Chen, De; Vanhaecke, Estelle Marie M.; Venvik, Hilde Johnsen; Walmsley, John (Journal article; Peer reviewed, 2017)Metal dusting corrosion is a catastrophic degradation phenomenon that initiates on metallic surfaces of chemical process equipment at elevated temperature and under carburizing atmospheres. It proceeds by a gradual breakdown ... -
Jet fuel range hydrocarbon production from propanal: Mechanistic insights into active site requirement of a dual-bed catalyst
Yeboah, Isaac; Feng, Xiang; Wang, Gang; Rout, Kumar Ranjan; Cai, Zhenping; Duan, Xuezhi; Zhou, Xinggui; Chen, De (Peer reviewed; Journal article, 2020)Utilization of sustainable biomass to produce jet fuel range hydrocarbons is imperatively needed to mitigate CO2 emissions and to liberate the over-reliance on fossil resources. Using propanal as the feedstock, an excellent ... -
Kinetic modeling of dynamic changing active sites in a Mars-van Krevelen type reaction: Ethylene oxychlorination on K-doped CuCl2/Al2O3
Ma, Hongfei; Sollund, Erling S.; Zhang, Wei; Fenes, Endre; Qi, Yanying; Wang, Yalan; Rout, Kumar Ranjan; Fuglerud, Terje; Piccinini, Marco; Chen, De (Peer reviewed; Journal article, 2020)A kinetic model was developed by taking into account the dynamic nature of the active sites in Mars–van Krevelen type catalytic reactions to predict the evolution of the reactant and product composition in the gas phase ... -
Kinetic Modeling of Oxychlorination Reaction
Wiker, Ellinor Sofie Smith (Master thesis, 2016)Polyvinyl chloride is a widely produced plastic polymer due to its various applications and relatively low cost. Oxychlorination of ethylene to 1,2-dichloroethane is an important step in the production of vinyl chloride ... -
Kinetic Modelling of Ethylene Oxychlorination Process Over Promoted CuCl2/Al2O3 Catalyst
Farzaneh Motlagh, Seyyedeh Roomina (Master thesis, 2022)Etylen-oksykloreringsprosessen er et viktig steg i produksjonen av polyvinylklorid. Polyvinylklorid er en av den mest brukte typen plast i verden, særlig innenfor bygg- og anleggsnæringen. Oksykloreringsreaksjonen er ... -
Kinetic Studies of Ethylene Oxychlorination to Ethylene Dichloride and Vinyl Chloride
Ma, Hongfei (Doctoral theses at NTNU;2021:85, Doctoral thesis, 2021)Polyvinyl chloride (PVC) is the most versatile of all thermoplastics that can be used in a wide range of applications. It is the third-highest volume polymer, slightly behind polyethylene and polypropylene. Vinyl chloride, ... -
Kinetic study and reactor modeling of ethylene oxychlorination
Sollund, Erling Olav (Master thesis, 2018)Oxychlorination of ethylene to 1,2-dichloroethane is a vital step in the production of polyvinyl chloride. Polyvinyl chloride is a plastic polymer that is widely used, especially in construction. The reaction is usually ... -
Kinetic study of high temperature water gas shift reaction
Vannier, Damien (Master thesis, 2011)The water gas shift reaction has been run at high temperature in a packed bed reactor with a nickel catalyst. The outlet was analyzed by gas chromatography. Gas phase reaction and diffusion limitations appeared to be ... -
Kinetic study of oxychlorination process
Ayuso Virgili, Gerard (Master thesis, 2012)The study of this project is focused on different areas. An important one is the study of the catalyst, through the experimental process it was studied the deactivation depending on parameters like temperature or reaction ... -
Kinetic Study of Oxychlorination Process
Baidoo, Martina Francisca (Master thesis, 2013)The oxychlorination of ethylene is an important process in the petrochemical industry because it affords the opportunity to untilise HCl produced during the cracking of ethylene dichloride. In this project the influence ... -
Kinetic study of oxychlorination process
Abdollahi, Reza (Master thesis, 2014)Doped CuCl2/Alumina is the catalyst for ethylene dichloride (C2H4CL2) production. Ethylene dichloride is the intermediate for generating polyvinyl chloride (PVC) and is produced as result of catalytic oxy-chlorination of ... -
Kinetic Study of the Oxychlorination Process
Fenes, Endre (Master thesis, 2015)The aim of this paper is to investigate the performance and stability of the non-promoted, potassium, cerium and mixed potassium/cerium promoted CuCl2/gamma-Al2O3 during oxychlorination of ethylene using mass spectroscopy ...