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| 1 | Sulfonic groups functionalized Zr-metal organic framework for highly catalytic transfer hydrogenation of furfural to furfuryl alcohol显示文摘The highly selective catalytic transfer hydrogenation(CTH)of furfural(FF)to furfuryl alcohol(FOL)is a significant route of biomass valorization.Herein,a series microporous Zr-metal organic framework(ZrMOF)functionalized by sulfonic groups are prepared.Based on the comprehensive structural characterizations by means of X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),N2 physisorption,Thermogravimetric(TG)and Fourier transformed infrared spectroscopy(FTIR),we find that sulfonic acid(–SO_(3)H)functional groups are tethered on the UIO-66 without affecting the structure of the framework.Systematic characterizations(NH_(3)-TPD,CO_(2)-TPD,and in-situ FTIR)demonstrate that modifying of sulfonic groups on UIO-66 results in the formation of stronger Lewis acidic-basic and Brnsted acidis sites.The cooperative role of the versatile Lewis acidic-basic and Brnsted acidic sites in 60%mol fraction of sulfonic acid-containing UIO-66(UIO-S_(0.6))retain high surface area and exhibit excellent catalytic performance of 94.7%FOL yield and 16.9 h^(-1).turnover number(TOF)under mild conditions.Kinetic experiments reveal that the activation energy of the CTH of furfural(FF)over UIO-S_(0.6) catalyst is as low as 50.8 k J mol^(-1).Besides,the hydrogen transfer mechanism is investigated through isotope labeling experiments,exhibiting that theβ-H in isopropanol is transferred to the a-C of FF by forming six-membered intermediates on the Lewis acidic-basic and Brnsted acidic sites of the UIO-S_(0.6),which is the rate-determining step in the formation of FOL. | Jingcheng Wu Dong Liang Xiangbo Song Tingsen Liu Tianyi Xu Shuangyin Wang Yuqin Zou | 2022 | Journal of Energy Chemistry2022，31，8： | 2 |
| 2 | Numerical study on the integrated effects of supplied air velocity and exhaust velocity on particles removal for industrial buildings显示文摘Due to production particularity in industrial buildings,high concentrations of particulate matter are always im-portant environmental issues.Long-term exposure to such hazardous environment may lead to respiratory and cardiovascular diseases.Mechanical ventilation plays a vital role in reducing indoor particulate matter concen-trations.However,the current industrial ventilation generally has the disadvantage of low ventilation efficiency and high energy consumption.In this study,we proposed a ventilation design by integrating supply and exhaust ventilation(i.e.,SEV),and further investigated the effects of combined velocities on both indoor particles re-moval and energy efficiency.Computational Fluid Dynamics(CFD)coupled with Discrete Phase Model(DPM)was employed.The RNG k-��model was adopted to simulate airflow field.Lagrangian method was used to trace particles’dispersion processes.A series of cases were conducted under ventilated conditions with combinations of different supplied velocities of 0.75,1.12,1.50 and 1.87 m/s,and exhausted velocities of 0,0.28 and 0.56 m/s.Temperature effects were not considered in this work.The quantification of combined effects of supply velocity and exhaust velocity were investigated in terms of particle removal efficiency as well as energy saving.Results showed that combined effects of supply velocity and exhaust velocity can improve the ventilation efficiency by 20%-40%compared to the conventional supply ventilation without exhaust velocity.Moreover,the reasonable design of integrated velocities will save up to 70%energy while keeping the same ventilation efficiency of SEV.These findings will be of great importance for energy-efficient design for industrial ventilation systems. | Tingsen Chen Shi-Jie Cao | 2021 | Energy and Built Environment2021，2，4： | 1 |
| 3 | Exploring the basis for Tai Chi Chuan as a therapeutic exercise approach显示文摘 | Steven L.Wolf Carol Coogler Tingsen Xu | | 0，，08： | 1 |
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