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Full-Text Articles in Engineering
Structure And Reactivity Of Single Site Ti Catalysts For Propylene Epoxidation, Zheng Lu, Xiaoyang Liu, Bin Zhang, Zhuoran Gan, Siwen Tang, Lu Ma, Tianpin Wu, George J. Nelson, Yong Qin, Heath C. Turner, Yu Lei
Structure And Reactivity Of Single Site Ti Catalysts For Propylene Epoxidation, Zheng Lu, Xiaoyang Liu, Bin Zhang, Zhuoran Gan, Siwen Tang, Lu Ma, Tianpin Wu, George J. Nelson, Yong Qin, Heath C. Turner, Yu Lei
PRC-Affiliated Research
Propylene epoxidation using molecular oxygen and hydrogen mixture on Au-based catalysts has attracted attention because of high propylene oxide selectivity and the use of an inexpensive and environmental friendly oxidant. Single-site titanium on metal oxide supports plays an important role in achieving high reactivity and selectivity in propylene epoxidation. Here we used TiO2 atomic layer deposition (ALD) to synthesize single-site titanium imbedded in the SiO2 framework for propylene epoxidation. High temperature calcination was used as post-treatment to control the titania structure and Tisingle bondO coordination number. Using UV–vis spectroscopy and X-ray absorption spectroscopy, we successfully established that under similar propylene …
Structure And Reactivity Of Single Site Ti Catalysts For Propylene Epoxidation, Zheng Lu, Xiaoyang Liu, Bin Zhang, Zhuoran Gan, Siwen Tang, Lu Ma, Tianpin Wu, George J. Nelson, Yong Qin, Heath C. Turner, Yu Lei
Structure And Reactivity Of Single Site Ti Catalysts For Propylene Epoxidation, Zheng Lu, Xiaoyang Liu, Bin Zhang, Zhuoran Gan, Siwen Tang, Lu Ma, Tianpin Wu, George J. Nelson, Yong Qin, Heath C. Turner, Yu Lei
PRC-Affiliated Research
Propylene epoxidation using molecular oxygen and hydrogen mixture on Au-based catalysts has attracted attention because of high propylene oxide selectivity and the use of an inexpensive and environmental friendly oxidant. Single-site titanium on metal oxide supports plays an important role in achieving high reactivity and selectivity in propylene epoxidation. Here we used TiO2 atomic layer deposition (ALD) to synthesize single-site titanium imbedded in the SiO2 framework for propylene epoxidation. High temperature calcination was used as post-treatment to control the titania structure and Tisingle bondO coordination number. Using UV–vis spectroscopy and X-ray absorption spectroscopy, we successfully established that under similar propylene …
Structure And Reactivity Of Single Site Ti Catalysts For Propylene Epoxidation, Zheng Lu, Xiaoyang Liu, Bin Zhang, Zhuoran Gan, Siwen Tang, Lu Ma, Tianpin Wu, George J. Nelson, Yong Qin, Heath C. Turner, Yu Lei
Structure And Reactivity Of Single Site Ti Catalysts For Propylene Epoxidation, Zheng Lu, Xiaoyang Liu, Bin Zhang, Zhuoran Gan, Siwen Tang, Lu Ma, Tianpin Wu, George J. Nelson, Yong Qin, Heath C. Turner, Yu Lei
PRC-Affiliated Research
Propylene epoxidation using molecular oxygen and hydrogen mixture on Au-based catalysts has attracted attention because of high propylene oxide selectivity and the use of an inexpensive and environmental friendly oxidant. Single-site titanium on metal oxide supports plays an important role in achieving high reactivity and selectivity in propylene epoxidation. Here we used TiO2 atomic layer deposition (ALD) to synthesize single-site titanium imbedded in the SiO2 framework for propylene epoxidation. High temperature calcination was used as post-treatment to control the titania structure and Tisingle bondO coordination number. Using UV–vis spectroscopy and X-ray absorption spectroscopy, we successfully established that under similar propylene …
Phase Rule Classification Of Physical And Chemical Critical Effects In Liquid Mixtures, James K. Baird, Xingjian Wang, Joshua R. Lang, Pauline Norris
Phase Rule Classification Of Physical And Chemical Critical Effects In Liquid Mixtures, James K. Baird, Xingjian Wang, Joshua R. Lang, Pauline Norris
PRC-Affiliated Research
The isobaric heat capacity and the coefficient of thermal expansion of a binary liquid mixture with a critical point of solution diverge as functions of temperature in the critical region. When the same liquids are used as solvents for chemical reactions, the van't Hoff plot of the extent of reaction diverges in the critical region. According to the phase rule, the physical and chemical properties are isomorphic in the sense that in each case the critical behavior is determined by three fixed thermodynamic intensive variables.
Phase Rule Classification Of Physical And Chemical Critical Effects In Liquid Mixtures, James K. Baird, Xingjian Wang, Joshua R. Lang, Pauline Norris
Phase Rule Classification Of Physical And Chemical Critical Effects In Liquid Mixtures, James K. Baird, Xingjian Wang, Joshua R. Lang, Pauline Norris
PRC-Affiliated Research
The isobaric heat capacity and the coefficient of thermal expansion of a binary liquid mixture with a critical point of solution diverge as functions of temperature in the critical region. When the same liquids are used as solvents for chemical reactions, the van't Hoff plot of the extent of reaction diverges in the critical region. According to the phase rule, the physical and chemical properties are isomorphic in the sense that in each case the critical behavior is determined by three fixed thermodynamic intensive variables.
Phase Rule Classification Of Physical And Chemical Critical Effects In Liquid Mixtures, James K. Baird, Xingjian Wang, Joshua R. Lang, Pauline Norris
Phase Rule Classification Of Physical And Chemical Critical Effects In Liquid Mixtures, James K. Baird, Xingjian Wang, Joshua R. Lang, Pauline Norris
PRC-Affiliated Research
The isobaric heat capacity and the coefficient of thermal expansion of a binary liquid mixture with a critical point of solution diverge as functions of temperature in the critical region. When the same liquids are used as solvents for chemical reactions, the van't Hoff plot of the extent of reaction diverges in the critical region. According to the phase rule, the physical and chemical properties are isomorphic in the sense that in each case the critical behavior is determined by three fixed thermodynamic intensive variables.
Economic Feasibility Of A Gasoline Production Plant From Lignocellulosic Feedstocks, Weixiang Guan, Sim-Ying Chua, Chi-Wing Tsang, Xiao Chen, Carol Sze Ki Lin, Raymond Sze Wai Fu, Haoquan Hu, Changhai Liang
Economic Feasibility Of A Gasoline Production Plant From Lignocellulosic Feedstocks, Weixiang Guan, Sim-Ying Chua, Chi-Wing Tsang, Xiao Chen, Carol Sze Ki Lin, Raymond Sze Wai Fu, Haoquan Hu, Changhai Liang
Faculty of Science & Technology (THEi)
In this study, the conceptual process flowsheet was developed and the economic feasibility of woody biomass conversion to biofuel as feedstock was analysed by considering several promising experimental processes for lignin depolymerization, such as hydrodeoxygenation and hydrogenolysis, along with lignocellulosic biomass fractionation processes. The engineering simulation process toward the commercial production of bio-gasoline from lignocellulosic biomass using SuperPro Designer® was modeled. The compatibility of the end products with the current gasoline specifications was evaluated and various blending options were investigated to meet the octane number and Reid vapor pressure requirement of the product. The economic potential of the simulated engineering …
Tuning The Acidity Of Pt/Cnts Catalysts For Hydrodeoxygenation Of Diphenyl Ether, Weixiang Guan, Chuang Li, Xiao Chen, Xiao-Ying Lu, Chi-Wing Tsang, Haoquan Hu, Hongxu Qi, Changhai Liang
Tuning The Acidity Of Pt/Cnts Catalysts For Hydrodeoxygenation Of Diphenyl Ether, Weixiang Guan, Chuang Li, Xiao Chen, Xiao-Ying Lu, Chi-Wing Tsang, Haoquan Hu, Hongxu Qi, Changhai Liang
Faculty of Science & Technology (THEi)
We herein present a method for the synthesis of HNbWO6, HNbMoO6, HTaWO6 solid acid nanosheet modified Pt/CNTs. By varying the weight of various solid acid nanosheets, a series of Pt/xHMNO6/CNTs with different solid acid compositions (x = 5, 20 wt%; M = Nb, Ta; N = Mo, W) have been prepared by carbon nanotube pretreatment, protonic exchange, solid acid exfoliation, aggregation and finally Pt particles impregnation. The Pt/xHMNO6/CNTs are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and NH3-temperature programmed desorption. The study revealed that HNbWO6 nanosheets were attached on CNTs, with some edges of the nanosheets being …
Lignin Valorizations With Ni Catalysts For Renewable Chemicals And Fuels Productions, Xiao Chen, Weixiang Guan, Chi-Wing Tsang, Haoquan Hu, Changhai Liang
Lignin Valorizations With Ni Catalysts For Renewable Chemicals And Fuels Productions, Xiao Chen, Weixiang Guan, Chi-Wing Tsang, Haoquan Hu, Changhai Liang
Faculty of Science & Technology (THEi)
Energy and fuels derived from biomass pose lesser impact on the environmental carbon footprint than those derived from fossil fuels. In order for the biomass-to-energy and biomass-to-chemicals processes to play their important role in the loop of the circular economy, highly active, selective, and stable catalysts and the related efficient chemical processes are urgently needed. Lignin is the most thermal stable fraction of biomass and a particularly important resource for the production of chemicals and fuels. This mini review mainly focuses on lignin valorizations for renewable chemicals and fuels production and summarizes the recent interest in the lignin valorization over …
Nimoal Catalysts Derived From Heptamolybdate-Intercalated Layered Double Hydroxides For Hydrodeoxygenation Of Anisole, Chuang Li, Xingzhao Zhang, Xiao Chen, Zhijian Peng, Chi-Wing Tsang, Changhai Liang
Nimoal Catalysts Derived From Heptamolybdate-Intercalated Layered Double Hydroxides For Hydrodeoxygenation Of Anisole, Chuang Li, Xingzhao Zhang, Xiao Chen, Zhijian Peng, Chi-Wing Tsang, Changhai Liang
Faculty of Science & Technology (THEi)
The catalytic performance of NiMoAl catalysts derived from layered double hydroxide (LDH) precursors with molybdenum species incorporated into the interlayers was investigated for the hydrodeoxygenation (HDO) of anisole as a model compound of the lignin. The results showed that high dispersion of small Ni nanoparticles with 2–5 nm due to the pinning effect of Mo from Mo7O246− intercalated the LDHs. Due to presence of the oxygen vacancy sites on the molybdenum oxide, the NiMoAl catalysts exhibit higher conversion of anisole than the corresponding NiAl catalyst. The activity for hydrodeoxygenation was enhanced with the increased content of molybdenum species, which can …
Nb(Ta)-Based Solid Acid Modified Pt/Cnts Catalysts For Hydrodeoxygenation Of Lignin-Derived Compounds, Weixiang Guan, Xiao Chen, Chuang Li, Jie Zhang, Chi-Wing Tsang, Haoquan Hu, Shaojie Li, Changhai Liang
Nb(Ta)-Based Solid Acid Modified Pt/Cnts Catalysts For Hydrodeoxygenation Of Lignin-Derived Compounds, Weixiang Guan, Xiao Chen, Chuang Li, Jie Zhang, Chi-Wing Tsang, Haoquan Hu, Shaojie Li, Changhai Liang
Faculty of Science & Technology (THEi)
Efficient upgrading of lignin bio-oils into oxygen-free liquid alkane fuels is a challenging task owing to the incompatibility of the phenolic feedstock with conventional fuels and the availability of effective hydrotreating catalysts based on the current refinery infrastructure. In this work, a series of solid acid nanosheets (HNbWO6, HNbMoO6, HTaWO6) modified Pt/CNTs bifunctional catalysts were evaluated in hydrodeoxygenation (HDO) of lignin-derived compounds. The effects of types of nanosheets and the synergistic effect between metal sites and acid sites were discussed via HDO of diphenyl ether. Pt/HNbWO6/CNTs catalyst exhibited the most efficient performance for the HDO of diphenyl ether to cyclohexane …