A study on the mechanism research on cellulose pyrolysis under catalysis of metallic salts

Shurong Wang,Zhongyang Luo,Kefa Cen,Qian Liu,Yanfen Liao 한국화학공학회 2007 Korean Journal of Chemical Engineering Vol.24 No.2

전시회 웹사이트의 브랜디드 콘텐츠 특성이 전시회에 대한 신뢰, 애착 및 참가의도에 미치는 영향

왕서용(Wang Shurong),이지연(Lee, Jiyeon),김봉석(Kim, BongSeok) 한국관광레저학회 2020 관광레저연구 Vol.32 No.3

The characteristic of Cu2ZnSnS4 thin film solar cells prepared by sputtering CuSn and CuZn alloy targets

Yilei Lu,Shurong Wang,Xun Ma,Xin Xu,Shuai Yang,Yaobin Li,Zhen Tang 한국물리학회 2018 Current Applied Physics Vol.18 No.12

Recent study shows that the main reason for limiting CZTS device performance lies in the low open circuit voltage, and crucial factor that could affect the Voc is secondary phases like ZnS existing in absorber layer and its interfaces. In this work, the Cu2ZnSnS4 thin film solar cells were prepared by sputtering CuSn and CuZn alloy targets. Through tuning the Zn/Sn ratios of the CZTS thin films, the crystal structure, morphology, chemical composition and phase purity of CZTS thin films were characterized by X-Ray Diffraction (XRD), scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDS) and Raman spectroscopy. The statistics data show that the CZTS solar cell with a ratio of Zn/Sn=1.2 have the best power convention efficiency of 5.07%. After HCl etching process, the CZTS thin film solar cell with the highest efficiency 5.41% was obtained, which demonstrated that CZTS film solar cells with high efficiency could be developed by sputtering CuSn and CuZn alloy targets.

Modelling of effective irradiation swelling for inert matrix fuels

Zhang, Jing,Wang, Haoyu,Wei, Hongyang,Zhang, Jingyu,Tang, Changbing,Lu, Chuan,Huang, Chunlan,Ding, Shurong,Li, Yuanming Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.8

The results of effective irradiation swelling in a wide range of burnup levels are numerically obtained for an inert matrix fuel, which are verified with DART model. The fission gas swelling of fuel particles is calculated with a mechanistic model, which depends on the external hydrostatic pressure. Additionally, irradiation and thermal creep effects are included in the inert matrix. The effects of matrix creep strains, external hydrostatic pressure and temperature on the effective irradiation swelling are investigated. The research results indicate that (1) the above effects are coupled with each other; (2) the matrix creep effects at high temperatures should be involved; and (3) ranged from 0 to 300 MPa, a remarkable dependence of external hydrostatic pressure can be found. Furthermore, an explicit multi-variable mathematic model is established for the effective irradiation swelling, as a function of particle volume fraction, temperature, external hydrostatic pressure and fuel particle fission density, which can well reproduce the finite element results. The mathematic model for the current volume fraction of fuel particles can help establish other effective performance models.

Analysis of Fuzhisan and Quantitation of Baicalin and Ginsenoside Rb1 by HPLC-DAD-ELSD

Jingkun Zhao,Desheng Wang,Shurong Duan,Jianxiu Wang,Jing Bai,Wenlan Li 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.7

Fuzhisan (FZS) is a traditional Chinese medicine composed of Radix Ginseng Rubra (Araliaceae family), Scutellaria baicalensis Georgi (Labiatae family), Angelica sinensis (Oliv) Diels (Umbelliferae family), Anemone altaica Fisch. Ex C.A. Mey (Araceae family) and Glycyrrhiza uralensis (Leguminosae family). To establish the chemical fingerprint of the components of FZS and quantify the components, baicalin and ginsenoside Rb1, a high performance liquid chromatography method coupled with diode array and evaporative light scattering detectors (DAD-ELSD) was developed. Separation of 36 omponents from 12 batches of FZS was performed on a C18 column, with a mobile phase consisting of acetonitrile and 0.1% acetic acidwater, with gradient elution at a column temperature of 30℃. The optimum detection wavelength was set at 335 nm, the drift tube temperature of ELSD was set at 80℃, the carrier gas pressure was 25 psi, and the gain = 10. The similarity among 12 batches of FZS was over 0.95. Five constituents of FZS, namely baicalin, ferulic acid, and ginsenosides Rg1, Re, and Rb1, were identified based on their retention times (RT). Calibration curves for baicalin and ginsenoside Rb1 showed good linearity (r2 > 0.9992); recoveries ranged from 95% to 99%. This quantification method is reproducible and simple, and may provide a tool to assess the quality of FZS.

Spreading Shape and Area Regulate the Osteogenesis of Mesenchymal Stem Cells

Yang Zhao,Qing Sun,Shurong Wang,Bo Huo 한국조직공학과 재생의학회 2019 조직공학과 재생의학 Vol.16 No.6

BACKGROUND: Mesenchymal stem cells (MSCs) have strong self-renewal ability and multiple differentiation potential. Some studies confirmed that spreading shape and area of single MSCs influence cell differentiation, but few studies focused on the effect of the circularity of cell shape on the osteogenic differentiation of MSCs with a confined area during osteogenic process. METHODS: In the present study, MSCs were seeded on a micropatterned island with a spreading area lower than that of a freely spreading area. The patterns had circularities of 1.0 or 0.4, respectively, and areas of 314, 628, or 1256 lm2. After the cells were grown on a micropatterned surface for 1 or 3 days, cell apoptosis and F-actin were stained and analyzed. In addition, the expression of b-catenin and three osteogenic differentiation markers were immunofluorescently stained and analyzed, respectively. RESULTS: Of these MSCs, the ones with star-like shapes and large areas promoted the expression of osteogenic differentiation markers and the survival of cells. The expression of F-actin and its cytosolic distribution or orientation also correlated with the spreading shape and area. When actin polymerization was inhibited by cytochalasin D, the shaperegulated differentiation and apoptosis of MSCs with the confined spreading area were abolished. CONCLUSION: This study demonstrated that a spreading shape of low circularity and a larger spreading area are beneficial to the survival and osteogenic differentiation of individual MSCs, which may be regulated through the cytosolic expression and distribution of F-actin.

Thermo-mechanical coupling behavior analysis for a U-10Mo/Al monolithic fuel assembly

Mao, Xiaoxiao,Jian, Xiaobin,Wang, Haoyu,Zhang, Jingyu,Zhang, Jibin,Yan, Feng,Wei, Hongyang,Ding, Shurong,Li, Yuanming Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.9

A typical three-dimensional finite element model for a fuel assembly is established, which is composed of 16 monolithic U-10Mo fuel plates and Al alloy frame. The distribution and evolution results of temperature, displacement and stresses/strains in all the parts are numerically obtained and analyzed with a self-developed code of FUELTM. The simulation results indicate that (1) the out-of-plane displacements of Al alloy side plates are mainly attributed to the bending deformations; (2) enhanced out-of-plane displacements appear in fuel plates adjacent to the outside Al plates, which results from the occurred bending deformations due to the applied constraints of outside Al plates; (3) an intense interaction of fuel foil with the cladding occurs near the foil edge, which appears more heavily in the fuel plates adjacent to the outside Al plates. The maximum first principal stresses in the fuel foil are similar for all the fuel plates and appear near the fuel foil edge; while, the through-thickness creep strains of fuel foil in the fuel plate near the central region of fuel assembly are larger, and the induced creep damage might weaken the fuel skeleton strength and raise the fuel failure risk.

Pyrolysis of wood species based on the compositional analysis

Qian Liu,Kaige Wang,Zhongyang Luo,Kefa Cen,Shurong Wang 한국화학공학회 2009 Korean Journal of Chemical Engineering Vol.26 No.2

Based on the Van Soest method, the components in Chinese fir and fast-growing poplar were quantified, and the fiber present was separated into three fractions: neutral detergent fiber, acid detergent fiber and strong acid detergent fiber. Microstructure of the fibers was investigated by a Fourier transform infrared spectrometry. Cellulose and hemicellulose both represent the characteristics of polysaccharides, while lignin has dissimilar structure. Pyrolysis of fir, poplar and the detergent fibers was carried out on a thermogravimetric analyzer coupled with FTIR spectrometry. After the removal of extractives and soluble minerals, pyrolysis of NDF shows the haracteristics of the three main components. Hydrocarbons, aldehydes, ketones, acids, alcohols and others are generated due to the primary pyrolysis of hemicellulose and cellulose in single stages. Phenols and alcohols are the dominant volatiles released from pyrolysis of lignin in two successive stages, respectively.

Three-dimensional Numerical Simulation of Hydrogen-induced Multi-field Coupling Behavior in Cracked Zircaloy Cladding Tubes

Zhongjia Xia,Bingzhong Wang,Jingyu Zhang,Shurong Ding,Liang Chen,Hua Pang,Xiaoming Song 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.1

In the high-temperature and high-pressure irradiation environments, the multi-field coupling processes ofhydrogen diffusion, hydride precipitation and mechanical deformation in Zircaloy cladding tubes occur. Tosimulate this hydrogen-induced complex behavior, a multi-field coupling method is developed, with theirradiation hardening effects and hydride-precipitation-induced expansion and hardening effects involvedin the mechanical constitutive relation. The out-pile tests for a cracked cladding tube after irradiation aresimulated, and the numerical results of the multi-fields at different temperatures are obtained andanalyzed. The results indicate that: (1) the hydrostatic stress gradient is the fundamental factor to activatethe hydrogen-induced multi-field coupling behavior excluding the temperature gradient; (2) in the localcrack-tip region, hydrides will precipitate faster at the considered higher temperatures, which can befundamentally attributed to the sensitivity of TSSP and hydrogen diffusion coefficient to temperature. Themechanism is partly explained for the enlarged velocity values of delayed hydride cracking (DHC) at hightemperatures before crack arrest. This work lays a foundation for the future research on DHC.

Thermal-fluid-structure coupling analysis for plate-type fuel assembly under irradiation. Part-I numerical methodology

Li, Yuanming,Yuan, Pan,Ren, Quan-yao,Su, Guanghui,Yu, Hongxing,Wang, Haoyu,Zheng, Meiyin,Wu, Yingwei,Ding, Shurong Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.5

The plate-type fuel assembly adopted in nuclear research reactor suffers from complicated effect induced by non-uniform irradiation, which might affect its stress conditions, mechanical behavior and thermal-hydraulic performance. A reliable numerical method is of great importance to reveal the complex evolution of mechanical deformation, flow redistribution and temperature field for the plate-type fuel assembly under non-uniform irradiation. This paper is the first part of a two-part study developing the numerical methodology for the thermal-fluid-structure coupling behaviors of plate-type fuel assembly under irradiation. In this paper, the thermal-fluid-structure coupling methodology has been developed for plate-type fuel assembly under non-uniform irradiation condition by exchanging thermal-hydraulic and mechanical deformation parameters between Finite Element Model (FEM) software and Computational Fluid Dynamic (CFD) software with Mesh-based parallel Code Coupling Interface (MpCCI), which has been validated with experimental results. Based on the established methodology, the effects of non-uniform irradiation and fluid were discussed, which demonstrated that the maximum mechanical deformation with irradiation was dozens of times larger than that without irradiation and the hydraulic load on fuel plates due to differential pressure played a dominant role in the mechanical deformation.