Pressure drop characteristics of adjustable slotted distributor in fluidized bed

[EN] In this paper, a fluidized bed with a adjustable slotted gas distributor was used to study fluidization in a 230 mm×200 mm rectangular fluidized bed by adjusting the spacing between the two slotted gas distributors. The pressure drop of the distributor at different inlet gas velocities was obtained and the change law between pressure drop and distance between distributors was summarized. This study provides a theoretical basis for the application of adjustable slotted gas distributor fluidized bed.The authors acknowledge Projects supported by the National Natural Science Foundation of China (Grant No. 31571906 & No.21506163).Tong, Z.; Chaoran, L.; Qing, X.; Zhanyong, L.; W., J. (2018). Pressure drop characteristics of adjustable slotted distributor in fluidized bed. En IDS 2018. 21st International Drying Symposium Proceedings. Editorial Universitat Politècnica de València. 1751-1758. https://doi.org/10.4995/IDS2018.2018.7729OCS1751175

Cardiac Epithelioid PEComa: Report of Two Cases and Review of the Literature

Cardiac PEComa is very rare. We reported two cases of epithelioid PEComas, one in an adult and one in a 2-year-old child. Both tumors were composed of sheets of epithelioid cells with coagulation necrosis. In addition, the adult case showed marked nuclear atypia and high mitotic activity with atypical mitosis and the pediatric case showed unusual clear cell features. Immunohistochemically, both tumors were positive for HMB-45 and SMA and negative for S100 and cytokeratin. Electron microscopy was performed in the pediatric case and showed premelanosomes. The adult patient developed extensive metastasis indicating malignant behavior. Prior to the two cases, only 5 other cases of cardiac PEComa were reported and the literatures are reviewed

Guest Editorial: Special Issue for the Asia-Pacific Drying Conference, 2011

10.1080/07373937.2012.701117Drying Technology30101027-1028DRTE

Atomization and Drying Characteristics of Sewage Sludge inside a Helmholtz Pulse Combustor

10.1080/07373937.2012.683122Drying Technology30101105-1112DRTE

A Coordinated Control Scheme for Power Demand Changes in a PMSG Based Multi-terminal DC Wind Farm

Although maximum power point tracking (MPPT) is crucial in the design of a wind power generation system, the necessary control strategies should also be considered for conditions that require a power reduction, called de-loading in this paper. A coordinated control scheme for a proposed current source converter (CSC) based DC wind energy conversion system is presented in this paper. This scheme combines coordinated control of the pitch angle, a DC load dumping chopper and the DC/DC converter, to quickly achieve wind farm de-loading. MATLAB/Simulink simulations and experiments are used to validate the purpose and effectiveness of the control scheme, both at the same power level

Atomically Precise Growth of Catalytically Active Cobalt Sulfide on Flat Surfaces and within a Metal–Organic Framework <i>via</i> Atomic Layer Deposition

Atomic layer deposition (ALD) has been employed as a new synthetic route to thin films of cobalt sulfide on silicon and fluorine-doped tin oxide platforms. The self-limiting nature of the stepwise synthesis is established through growth rate studies at different pulse times and temperatures. Additionally, characterization of the materials by X-ray diffraction and X-ray photoelectron spectroscopy indicates that the crystalline phase of these films has the composition Co₉S₈. The nodes of the metal–organic framework (MOF) <b>NU-1000</b> were then selectively functionalized with cobalt sulfide <i>via</i> ALD in MOFs (AIM). Spectroscopic techniques confirm uniform deposition of cobalt sulfide throughout the crystallites, with no loss in crystallinity or porosity. The resulting material, <b>CoS-AIM</b>, is catalytically active for selective hydrogenation of <i>m</i>-nitrophenol to <i>m</i>-aminophenol, and outperforms the analogous oxide AIM material (<b>CoO-AIM</b>) as well as an amorphous CoS_<i>x</i> reference material. These results reveal AIM to be an effective method of incorporating high surface area and catalytically active cobalt sulfide in metal–organic frameworks

Toward Inexpensive Photocatalytic Hydrogen Evolution: A Nickel Sulfide Catalyst Supported on a High-Stability Metal–Organic Framework

Few-atom clusters composed of nickel and sulfur have been successfully installed into the Zr­(IV)-based metal–organic framework (MOF) NU-1000 via ALD-like chemistry (ALD = atomic layer deposition). X-ray photoelectron spectroscopy and Raman spectroscopy are used to determine that primarily Ni²⁺ and S^2– sites are deposited within the MOF. In a pH 7 buffered aqueous solution, the porous catalyst is able to produce H₂ gas at a rate of 3.1 mmol g^–1 h^–1 upon UV irradiation, whereas no H₂ is generated by irradiating bare NU-1000. Upon visible light irradiation, little H₂ generation was observed; however, with the addition of an organic dye, rose bengal, NiS-AIM can catalyze the production of H₂ at an enhanced rate of 4.8 mmol g^–1 h^–1. These results indicate that ALD in MOFs (AIM) can engender reactivity within high surface area supports for applications in the solar fuels field