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Removal of Nitrogen Compounds from Shale Diesel Fraction Using Ionic Liquid [C_4mim]hSO_4

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China Petroleum Processing & Petrochemical Technology 2016年第3期18卷 15-21页

作者： Liu Jie Ma bo College of Chemical Engineering China University of PetroleumQingdao College of Chemistry Chemical Engineering and Environmental EngineeringLiaoning Shihua University

Ionic liquid(IL) 1-butyl-3-methylimidazolium hydrosulphate([C_4mim]hSO_4) was synthesized and its denitrogenation performance was investigated for diesel fraction with high content of nitride from oil shale. The effects of the temperature, the mass ratio of oil to IL, the mass ratio of water to IL, the extraction time, the settling time and the regeneration of IL on the N-removal efficiency were studied. Experimental results showed that the ionic liquid [C_4mim]hSO_4 exhibited excellent denitrogenation performance, and about a 90% basic N-extraction efficiency and a 71% total N-extraction efficiency were achieved under the conditions covering a temperature of 30 ℃, an oil/IL mass ratio of 7:1, a h_2O/ IL mass ratio of 2:1, an extraction time of 20 min and a settling time of 120 min. In addition, the basic N-removal efficiency can still reach 74% during five recycles of the ionic liquid.

关键词： ionic liquid denitrogenation shale diesel fraction

Optimal error estimates and modified energy conservation identities of the ADI-FDTD scheme on staggered grids for 3D Maxwell's equations

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Science China Mathematics 2013年第8期56卷 1705-1726页

作者： GAO LiPing ZhANG bo School of Sciences China University of Petroleum LSEC and Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of Sciences

This paper is concerned with the optimal error estimates and energy conservation properties of the alternating direction implicit finite-difference time-domain （ADI-FDTD） method which is a popular scheme for solving the 3D Maxwell＇s equations. Precisely, for the case with a perfectly electric conducting （PEC） boundary condition we establish the optimal second-order error estimates in both space and time in the discrete hi-norm for the ADI-FDTD scheme, and prove the approximate divergence preserving property that if the divergence of the initial electric and magnetic fields are zero, then the discrete L2-norm of the discrete divergence of the ADI-FDTD solution is approximately zero with the second-order accuracy in both space and time. The key ingredient is two new discrete modified energy norms which are second-order in time perturbations of two new energy conservation laws for the Maxwell＇s equations introduced in this paper. ~rthermore, we prove that, in addition to two known discrete modified energy identities which are second-order in time perturbations of two known energy conservation laws, the ADI-FDTD scheme also satisfies two new discrete modified energy identities which are second-order in time perturbations of the two new energy conservation laws. This means that the ADI-FDTD scheme is unconditionally stable under the four discrete modified energy norms. Experimental results which confirm the theoretical results are presented.

关键词： alternating direction implicit method finite-difference time-domain method Maxwell's equations,optimal error estimate superconvergence unconditional stability energy conservation divergence preservingproperty

Expression of early growth response factor-1 in rats with cerulein-induced acute pancreatitis and its significance

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World Journal of Gastroenterology 2005年第32期11卷 5022-5024页

作者： Lan-bo Gong Li he Yang Liu Xue-Qing Chen bo Jiang Department of Gastroenterology Nanfang Hospital Southern Medical University Guangzhou 510515 Guangdong Province China Department of Gastroenterology Second Affiliated Hospital of Shenyang Medical College Shenyang 110002 Liaoning Province China

AIM： To observe the expressions of early growth response factor-1 （Egr-1） and tissue factor （TF） in rats with cerulein-induced acute pancreatitis and to explore its significance. METhODS： A large dose of cerulein was used to create the experimental acute pancreatitis model in rats. The changes of Egr-1 mRNA and protein in rats were observed during 30 min to 4 h after the treatment and immunohistochemical method was used to observe the localized expression of Egr-1 in tissues. In addition to the mRNA expression of Egr-1 target gene, TF was also observed. A blank control group, and a bombesinadministered group were used for comparison. RESULTS： Alter the stimulation of a large dose of cerulein, the rats showed typical inflammatory changes of acute pancreatitis. Thirty minutes alter the stimulation, the mRNA expression of Egr-1 in the pancreatic tissue reached its peak and then declined, while the expression of Egr-1 protein reached its peak 2 h after the stimulation. histologically, 2 h after the stimulation, almost all pancreatic acinar cells had the expression of Egr-1 protein, which was focused in the nuclei. The mRNA expression of TF occurred 1 h after the stimulation and gradually increased within 4 h. however, a large dose of bombesin only stimulated the pancreatic tissue to produce a little mRNA expression of Egr-1 and no mRNA expression of Egr-1 protein and TF. CONCLUSION： Egr-1 as a pro-inflammatory transcription factor may play an important role in the pathogenesis of acute pancreatitis by modulating the expression of TF.

关键词： Growth response factor-1 Tissue factor Acute pancreatitis Cerulein bombesin

Formic acid dehydrogenation reaction on high-performance Pd_(x)Au_(1−x) alloy nanoparticles prepared by the eco-friendly slow synthesis methodology

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Frontiers in Energy 2023年第6期17卷 751-762页

作者： Yibo GAO Erjiang hU bo hUANG Zuohua hUANG State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China Institute of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 712000China

Dehydrogenation of formic acid (FA) is considered to be an effective solution for efficient storage and transport of hydrogen. For decades, highly effective catalysts for this purpose have been widely investigated, but numerous challenges remain. herein, the Pd_(x)Au_(1−x) (x = 0, 0.2, 0.4, 0.5, 0.6, 0.8, 1) alloys over the whole composition range were successfully prepared and used to catalyze FA hydrogen production efficiently near room temperature. Small PdAu nanoparticles (5–10 nm) were well-dispersed and supported on the activated carbon to form PdAu solid solution alloys via the eco-friendly slow synthesis methodology. The physicochemical properties of the PdAu alloys were comprehensively studied by utilizing various measurement methods, such as X-ray diffraction (XRD), N2 adsorption–desorption, high angle annular dark field-scanning transmission electron microscope (hAADF-STEM), X-ray photoelectrons spectroscopy (XPS). Notably, owing to the strong metal-support interaction (SMSI) and electron transfer between active metal Au and Pd, the Pd0.5Au0.5 obtained exhibits a turnover frequency (TOF) value of up to 1648 h−1 (313 K, nPd+Au/nFA = 0.01, nhCOOh/nhCOONa = 1:3) with a high activity, selectivity, and reusability in the FA dehydrogenation.

关键词： FA dehydrogenation face-centred cubic structures PdAu solid solution alloy nanoparticles slow synthesis methodology SMSI effect

Physical simulation of mixing on a C-h2 smelting reduction reactor with different tracer feeding positions

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Journal of Iron and Steel Research International 2020年第9期27卷 1018-1034页

作者： Jin-yin Xie bo Wang Jie-yu Zhang State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferrometallurgy School of Materials Science and EngineeringShanghai UniversityShanghai 200072China

With the growing demand for energy saving,emission reduction,and green metallurgy,we had designed a new C-h2 smelting reduction *** order to solve the key problem that the heat transfer efficiency from high temperature oxidation zone in upper region to low temperature reduction zone in lower region is low in traditional metallurgical reduction reactor,a water simulation was adopted to optimize the mean residence time and to improve the transmission efficiency within the *** to the modified Froude similarity,a water model experimental reactor with a ratio of 1:1 to the prototype was *** the prototype,the feed port was used to feed preheated ore and *** order to simulate the effect of different feeding positions of the tracer on the mixing behavior in the molten pool,four points of tracer feeding position were arranged for a systematic *** the same time,based on double-row side nozzle with thick slag layer in a C-h2 smelting reduction reactor,nine influencing factors,including relative angle between upper and lower side nozzles,were *** experimental results showed that the tracer feeding position had a great influence on the mean residence time,and the relative angle also had a great influence on tracer feeding ***,through comprehensive analysis,the optimal condition parameters were obtained under different tracer feeding *** results provide valuable help for the design and optimization of the C-h2 smelting reduction reactor.

关键词： Smelting reduction reactor Tracer feeding position Double-row side blowing Mean residence time Relative angle horizontal angle Vertical angle

Spectroscopic characterization and photochemistry of the Criegee intermediate CF_(3)C(h)OO

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Journal of Environmental Sciences 2022年第4期34卷 160-169页

作者： Lina Wang Zhuang Wu bo Lu Xiaoqing Zeng Department of Chemistry Shanghai Key Laboratory of Molecular Catalysts and Innovative MaterialsFudan UniversityShanghai 200433China

Criegee intermediates(CIs),also known as carbonyl oxide,are reactive intermediates that play an important role in the atmospheric *** on the structures and reactivity of CIs is of fundamental importance in understanding the underlying mechanism of their atmospheric *** sharp contrast to the intensively studied parent molecule(Ch_(2)OO)and the alkyl-substituted derivatives,the knowledge about the fluorinated analogue CF_(3)C(h)OO is *** carefully heating the triplet carbene CF_(3)Ch in an O2-doped Ar-matrix to 35 K,the elusive carbonyl oxide CF_(3)C(h)OO in syn-and anti-conformations has been generated and characterized with infrared(IR)and ultraviolet-visible(UV-vis)*** spectroscopic identification is supported by^(18)O-labeling experiments and quantum chemical calculations at the B3 LYP/6-311++G(3df,3pd)and MP2/6-311++G(2d,2p)*** the long-wavelength irradiation(λ>680 nm),both conformers of CF_(3)C(h)OO decompose to give trifluoroacetaldehyde CF_(3)C(h)O and simultaneously rearrange to the isomeric dioxirane,cyclic-CF_(3)Ch(OO),which undergoes isomerization to the lowest-energy carboxylic acid CF_(3)C(O)Oh upon UV-light excitation at 365 *** O_(2)-oxidation of CF_(3)Ch via the intermediacy of CF_(3)C(h)OO and cyclic-CF_(3)Ch(OO)might provide new insight into the mechanism for the degradation of hydro-chlorofluorocarbon CF_(3)ChCl_(2)(hCFC-123)in the atmosphere.

关键词： Criegee intermediates CF_(3)COOh(TFA) CF_(3)ChCl_(2)(hCFC-123) Photochemistry Matrix-isolation spectroscopy

Synthesis, Crystal Structure and Biological Activity of a Novel Amino Acid Salt (hGly)_4[hPMo_(12)O_(40) ]_2·22h_2O

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Chemical Research in Chinese Universities 2003年第1期19卷 15-19页

作者： hAN Zheng-bo ChANG Ya-ping 等 InstituteofPolyoxometalateChemistry FacultyofChemistryNortheastNormalUniversityChangchun130024P.R.China CollegeofMedical JilinUniversityChangchun130021P.RChina

A novel compound, (hGly) 4[hPMo 12 O 40 ] 2·22h 2O, was synthesized and characterized by means of elemental analysis, IR and X ray diffraction. The compound crystallized in a monoclinic space group Cc with a =4 0060(0 8) nm, b =1 2527(0 3) nm, c =1 9930(0 4) nm, β =96 36(3)°, V =9 940(3) nm 3, Z =2, R 1=0 0576, wR 2 =0 1746. The anti tumor activity of this compound was tested in two human tumor cell lines in vitro .

关键词： Polyoxometalate Gly Crystal structure Biological activity

Size matters:the biochemical logic of ligand type in endocrine crosstalk

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Life Metabolism 2024年第1期3卷 10-20页

作者： Jameel Barkat Lone Jonathan Z.Long Katrin J.svensson Department of Pathology Stanford University School of MedicineStanfordCA 94305United States Department of Chemistry Stanford UniversityStanfordCA 94305United States Stanford Diabetes Research Center Stanford University School of MedicineStanfordCA 94305United States Sarafan ChEM-h Stanford UniversityStanfordCA 94305United States Wu Tsai human Performance Alliance Stanford UniversityStanfordCA 94305United States Stanford Cardiovascular Institute Stanford University School of MedicineCA 94305United States

The endocrine system is a fundamental type of long-range cell-cell communication that is important for maintaining metabolism,physiology,and other aspects of organismal *** signaling is mediated by diverse blood-borne ligands,also called hormones,including metabolites,lipids,steroids,peptides,and *** size and structure of these hormones are fine-tuned to make them bioactive,responsive,and adaptable to meet the demands of changing *** has nature selected such diverse ligand types to mediate communication in the endocrine system?What is the chemical,signaling,or physiologic logic of these ligands?What fundamental principles from our knowledge of endocrine communication can be applied as we continue as a field to uncover additional new circulating molecules that are claimed to mediate long-range cell and tissue crosstalk?This review provides a framework based on the biochemical logic behind this crosstalk with respect to their chemistry,temporal regulation in physiology,specificity,signaling actions,and evolutionary development.

关键词： endocrine ligand size metabolites signaling evolution

Synergistic effect of cobalt and niobium in Co_(3)-Nb-O_(x)on performance of selective catalytic reduction of NO with Nh_(3)

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Rare Metals 2022年第1期41卷 166-178页

作者： bo-Lin Zhang Li-Feng Deng bo Liu Chun-Yun Luo Michael Liebau Shen-Gen Zhang Roger Glaser Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China Shunde Graduate School University of Science and Technology BeijingFoshan 528399China Jiangsu Longkingcotech Co. Ltd.Yancheng 224000China Institute of Chemical Technology Universita¨t LeipzigLeipzig 04103Germany e-mail:roger.glaeser

Combining the redox properties of Co and the acid properties of Nb in a Co_(3)-Nb-O_(x)catalyst is shown to provide superior performance in the selective catalytic reduction of NO with Nh_(3)(Nh_(3)-SCR).Co_(3)O_(4)shows average activity,however,it exhibits a poor N_(2)***_(2)O_(5)is not active for Nh_(3)-***,the mixed Co_(3)-Nb-O_(x) catalyst shows higher NO conversion and N_(2)selectivity than the single Co_(3)O_(4)and Nb_(2)O_(5)catalysts at 100–300℃.The results of temperature programmed reduction by h_(2)and X-ray photoelectron(XP)spectra indicate that the addition of Nb changes the chemical states of Co and decreases the concentration of Co^(3+) and Oa,adjusting the activity for catalytic oxidation to a moderate *** suppresses the formation of undesired N_(2)O from the over-oxidation of Nh_(3).Incorporation of Co and Nb into one solid synergistically couples their redox behavior and surface acidity,ensuring the high catalytic activity and N2 selectivity in Nh3-SCR.

关键词： Co-Nb Selective catalytic reduction Lowtemperature Acid property Redox behavior