Browsing NTNU Open by Author "Qian, Gang"
Now showing items 1-17 of 17
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A comprehensive kinetics study on non-isothermal pyrolysis of kerogen from Green River oil shale
Kuang, Wuqi; Lu, Mengke; Yeboah, Isaac; Qian, Gang; Duan, Xuezhi; Yang, Jia; Chen, De; Zhou, Xinggui (Journal article; Peer reviewed, 2018)Fundamentally understanding the pyrolysis kinetics of kerogen is of prime scientific and industrial importance. Herein, bitumen- and carbonates-free kerogen sample is prepared through Soxhlet extraction followed by ... -
Active sites of Pt/CNTs nanocatalysts for aerobic base-free oxidation of glycerol
Pan, Minjian; Wang, Jingnan; Fu, Wenzhao; Chen, Bingxu; Lei, Jiaqi; Chen, Wenyao; Duan, Xuezhi; Chen, De; Qian, Gang; Zhou, Xinggui (Peer reviewed; Journal article, 2019)Understanding the nature of Pt active sites is of great importance for the structure-sensitive base-free oxidation of glycerol. In the present work, the remarkable Pt particle size effects on glycerol conversion and products ... -
Au nanoparticles deposited on the external surfaces of TS-1: Enhanced stability and activity for direct propylene epoxidation with H2 and O2
Feng, Xiang; Duan, Xuezhi; Qian, Gang; Zhou, Xinggui; Chen, De; Yuan, Weikang (Journal article; Peer reviewed, 2014)Au/TS-1 catalysts prepared by deposition–precipitation method are very promising for direct propylene epoxidation with H2 and O2. However, the catalysts usually suffer from rapid deactivation. In this work, calcined TS-1 ... -
Au/TS-1 catalyst prepared by deposition–precipitation method for propene epoxidation with H2/O2: Insights into the effects of slurry aging time and Si/Ti molar ratio
Feng, Xiang; Duan, XueZhi; Cheng, Hong-ye; Qian, Gang; Chen, De; Yuan, Wei-Kang; Zhou, Xing-Gui (Journal article; Peer reviewed, 2015)Au/TS-1 catalyst prepared by deposition–precipitation method is efficient for propene epoxidation with H2/O2, and its performance is significantly affected by the preparation parameters and the properties of support. In ... -
Au/uncalcined TS-1 catalysts for direct propene epoxidation with H2 and O2: Effects of Si/Ti molar ratio and Au loading
Feng, Xiang; Duan, Xuezhi; Yang, Jia; Qian, Gang; Zhou, Xinggui; Chen, De; Yuan, Weikang (Journal article; Peer reviewed, 2015)For direct propene epoxidation with H2/O2, TS-1 with blocked micropores (TS-1-B) is recognized as an attractive support for Au catalysts with enhanced stability and activity by suppressing the deactivation caused by micropore ... -
Charge-Tuned CO Activation over a χ‑Fe5C2 Fischer−Tropsch Catalyst
Chen, Bingxu; Wang, Di; Duan, Xuezhi; Liu, Wei; Li, Yefei; Qian, Gang; Yuan, Weikang; Holmen, Anders; Zhou, Xinggui; Chen, De (Journal article; Peer reviewed, 2018)We performed DFT calculations to understand CO activation over a χ-Fe5C2 Fischer–Tropsch catalyst. The χ-Fe5C2 catalyst exhibits unique CO activation behaviors, and the BEP relation is nearly valid for this system. The ... -
Enhanced Catalytic Performance for Propene Epoxidation with H2 and O2 over Bimetallic Au–Ag/Uncalcined Titanium Silicate-1 Catalysts
Feng, Xiang; Yang, Jia; Duan, Xuezhi; Cao, Yueqiang; Chen, Bingxu; Chen, Wenyao; Lin, Dong; Qian, Gang; Chen, De; Yang, Chaohe; Zhou, Xinggui (Journal article; Peer reviewed, 2018)Gradually emerging environmental concerns have triggered the development of highly efficient catalysts for propene epoxidation with H2 and O2. Unfortunately, intensifying the activity and stability is still a challenging ... -
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 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 ... -
Kinetics-assisted discrimination of active sites in Ru catalyzed hydrolytic dehydrogenation of ammonia borane
Fu, Wenzhao; Chen, Wenyao; Qian, Gang; Chen, De; Yuan, Weikang; Zhou, Xinggui; Duan, Xuezhi (Journal article; Peer reviewed, 2019)Identifying the underlying nature of the structure sensitivity from the catalyst active site point of view in heterogeneous catalytic reactions is of prime scientific and industrial importance. In this work, the kinetics-assisted ... -
Mechanistic insight into size-dependent activity and durability in Pt/CNT catalyzed hydrolytic dehydrogenation of ammonia borane
Chen, Wenyao; Ji, Jian; Feng, Xiang; Duan, Xuezhi; Qian, Gang; Li, Ping; Zhou, Xinggui; Chen, De; Yuan, Weikang (Journal article; Peer reviewed, 2014)We report a size-dependent activity in Pt/CNT catalyzed hydrolytic dehydrogenation of ammonia borane. Kinetic study and model calculations revealed that Pt(111) facet is the dominating catalytically active surface. There ... -
Reaction mechanism and kinetics for hydrolytic dehydrogenation of ammonia borane on a Pt/CNT catalyst
Chen, Wenyao; Li, Dali; Wang, Zijun; Qian, Gang; Sui, Zhijun; Duan, Xuezhi; Zhou, Xinggui; Yeboah, Isaac; Chen, De (Journal article; Peer reviewed, 2017)A reaction mechanism is proposed for hydrolytic dehydrogenation of ammonia borane on a Pt/CNT catalyst. A combination of thermodynamic analysis and FTIR measurement reveals that B‐containing byproducts are mainly in the ... -
Reaction mechanism and kinetics for Pt/CNTs catalyzed base-free oxidation of glycerol
Ma, Yuanyuan; Gan, Jie; Pan, Minjian; Zhang, Yanfang; Fu, Wenzhao; Duan, Xuezhi; Chen, Wenyao; Chen, De; Qian, Gang; Zhou, Xinggui (Journal article; Peer reviewed, 2019)Fundamental understanding of heterogeneously catalyzed aerobic, base-free oxidation of glycerol is highly desirable for sustainable and highly efficient chemical synthesis. In this work, Pt/CNTs catalyzed base-free oxidation ... -
SbOx‐promoted pt nanoparticles supported on CNTs as catalysts for base‐free oxidation of glycerol to dihydroxyacetone
Duan, Xuezhi; Zhang, Yanfang; Pan, Minjian; Dong, Hua; Chen, Bingxu; Ma, Yuanyuan; Qian, Gang; Zhou, Xinggui; Yang, Jia; Chen, De (Journal article; Peer reviewed, 2018)Understanding of selective base‐free oxidation of glycerol to dihydroxyacetone (DHA) over Pt‐based catalysts is of paramount scientific and industrial importance. In this work, a comparative study between differently sized ... -
Structural and kinetic insights into Pt/CNT catalysts during hydrogen generation from ammonia borane
Chen, Wenyao; Wang, Zijun; Duan, Xuezhi; Qian, Gang; Chen, De; Zhou, Xinggui (Journal article; Peer reviewed, 2018)Unraveling the structural and kinetic consequences of catalyst properties, which vary with the catalyst preparation methods, on their catalytic behaviors is of prime scientific and industrial importance. Exemplified by ... -
Tailoring of Fe/MnK-CNTs Composite Catalysts for the Fischer–Tropsch Synthesis of Lower Olefins from Syngas
Chen, Bingxu; Zhang, Xinxin; Wenyao, Chen; Wang, Di; Song, Nan; Qian, Gang; Duan, Xuezhi; Yang, Jia; Chen, De; Yuan, Wei-kang; Zhou, Xinggui (Journal article; Peer reviewed, 2018)Iron-catalyzed conversion of coal/biomass-derived syngas directly to lower olefins through Fischer–Tropsch synthesis (i.e., FTO) is a sustainable and short-flow process. Herein, effects of Mn and K promoter loadings on FTO ... -
Uncalcined TS‐2 immobilized Au nanoparticles as a bifunctional catalyst to boost direct propylene epoxidation with H2 and O2
Zhang, Zhihua; Zhao, Xuan; Wang, Gang; Xu, Jialun; Lu, Mengke; Fu, Wenzhao; Duan, Xuezhi; Qian, Gang; Chen, De (Journal article; Peer reviewed, 2019)Developing stable yet efficient Au–Ti bifunctional catalysts is important but challenging for direct propylene epoxidation with H2 and O2. This work describes a novel strategy of employing uncalcined titanium silicalite‐2 ...