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CeO_2 as the Oxygen Carrier for Partial Oxidation of Methane to Synthesis Gas in Molten Salts: Thermodynamic Analysis and Experimental Investigation

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Journal of Natural Gas Chemistry 2007年第1期16卷 6-11页

作者： yonggang wei Hua Wang Fang He Xianquan Ao Chiyuan Zhang Faculty of Materials and Metallurgy Engineering Kunming University of Science and Technology Kunming 650093 Yunnan China

A new technique -- the direct partial oxidation of methane to synthesis gas using lattice oxygen in molten salts medium has been introduced. Using CeO2 as the oxygen carrier, thermodynamic data were calculated in the reaction process, and the results indicated that direct partial oxidation of methane to synthesis gas using lattice oxygen of cerium oxide is feasible in theory. In a stainless steel reactor, the effects of temperature and varying amounts of γ-Al2O3 supported CeO2 on cn4 conversion, H2 and CO selectivity, were investigated, respectively. The results show that 10% CeO2/γ-Al2O3 has the maximal reaction activity at a temperature of 865 ℃ and above, the H2/CO ratio in the gas that has been produced reaches 2 and the CH4 conversion, H2 and CO selectivity reached the following percentages： i.e. 61%, 89%, and 91% at 870 ℃, respectively. In addition, increase of reaction temperature is favorable for the partial oxidation of methane.

关键词： partial oxidation methane cerium oxide synthesis gas molten salt

Laparoscopic liver resection:a review of current indications and surgical techniques

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Hepatobiliary Surgery and Nutrition 2018年第4期7卷 277-288页

作者： Chenyang Jia Hongyu Li Ningyuan Wen Junhua Chen yonggang wei Bo Li Department of Liver Surgery Center of Liver TransplantationWest China Hospital of Sichuan UniversityChengdu 610041China Department of Pancreatic Surgery West China Hospital of Sichuan UniversityChengdu 610041China College of Clinical Medicine Sichuan UniversityChengdu 610065China Department of General surgery Chengdu First People’s HospitalChengdu 610200China

Laparoscopic liver resection (LLR) has been the most impressive development in the field of liver surgery in recent two decades. Technical innovations and experience accumulation have made LLR a safe and effective procedure with faster postoperative recovery. Despite the fast spreading of the procedure, details regarding the indications, oncological outcomes and technical essentials were still disputable. To address these issues, two international consensus conferences were hold to update the knowledge in this field. The statements of the both conferences were not conclusive and more high-quality researches are required. In this article, we reviewed the development and the current state of LLR. Indications, outcomes, surgical techniques and devices used in LLR were also discussed.

关键词： Laparoscopic liver resection (LLR) minimally invasive indication technique

Influence of Ethylene Glycol on the Formation of Calcium Phosphate Nanocrystals

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Journal of Materials Science & Technology 2003年第6期19卷 628-630页

作者： Yi ZUO, Yubao LI, Jie wei and yonggang YANResearch Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, China Res. Ctr. for Nano-Biomaterials Analytical and Testing Ctr. Sichuan Univ. Chengdu 610064 China

A synthesis route of using calcium hydroxide Ca(OH)2 with ethylene glycol solvent and orthophosphoric acid (H3PO4) as reagents is described. Three ratios of ethylene glycol to distilled water 1:0, 1:1 and 0:1 are used as diluting media for Ca(OH)2. Crystals of different morphology and composition are formed under weak alkaline circumstance at pH 7.0-8.0. Acicular calcium phosphate nanocrystals are prepared in pure ethylene glycol while rod-like calcium phosphate nanocrystals form in pure distilled water. The nanograde size of the former is smaller than that of the latter. Calcium-deficient apatite (CDAP) is obtained with a Ca/P molar ratio of 1.66. Therefore, it was deduced that the usage of ethylene glycol solvent could influence the formation of calcium phosphate crystal lattice.

关键词： Acicular nanocrystals Calcium phosphate Ethylene glycol solvent Weak alkaline circumstance

Typing of biliary tumor thrombus influences the prognoses of patients with hepatocellular carcinoma

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Cancer Biology & Medicine 2021年第3期18卷 808-815页

作者： Juxian Sun Jiayi Wu Chang Liu Jie Shi yonggang wei Jianyin Zhou Zhibo Zhang Wan Yee Lau Maolin Yan Shuqun Cheng Department of Hepatic SurgeryⅥ The Eastern Hepatobiliary Surgery HospitalSecond Military Medical UniversityShanghai 200433China Shengli Clinical Medical College Fujian Medical UniversityFuzhou 350001China Department of Hepatobiliary Surgery Fujian Provincial HospitalFuzhou 350001China Department of Hepatobiliary Surgery West China HospitalSichuan UniversityChengdu 610041China Department of Hepatobiliary Surgery Zhongshan HospitalXiamen UniversityXiamen 361004China Department of Hepatobiliary Surgery The First Affiliated Hospital of Fujian Medical UniversityFuzhou 350002China Faculty of Medicine The Chinese University of Hong KongHong Kong 999077China

Objective:To establish a new classification of biliary tumor thrombus(BTT).Methods:Overall survival of patients with BTT was first used to determine whether it correlated with current hepatocellular carcinoma staging *** and multivariate analyses were used to determine factors affecting the overall survival(OS)to form the basis of our new classification for ***:All 6 international staging systems showed overlapping survival *** followed by multivariate analyses showed that total bilirubin and intrahepatic/extrahepatic BTT were significant risk factors of *** on these data,a new BTT classification was defined as:TypeⅠ:intrahepatic BTT;and TypeⅡ:extrahepatic BTT involving a common bile duct or common hepatic ***Ⅰwas further subdivided into type Ia:BTT involving a second-order intrahepatic duct or above,and type Ib:BTT involving a first-order intrahepatic ***Ⅱwas further subdivided into typeⅡa and typeⅡb using a cut-off total bilirubin(TB)>300μmol/*** numbers(percentages)of patients with typesⅠandⅡBTT were 69(34.2%)and 133(65.8%),*** median OS of typeⅠpatients was significantly higher than that of typeⅡpatients(37.5 months vs.23.2 months;P=0.002).Using subgroup analyses,OS outcomes were significantly different between the subgroups of typeⅡb and type IIa,although there was no significant difference between the type Ia and type Ib subgroups(P=0.07).Conclusions:A new BTT classification was established to predict prognoses of HCC patients with BTT who underwent liver resection.

关键词： Hepatocellular carcinoma biliary tumor thrombus staging system surgery prognosis

Supplement for the paper titled: "Laparoscopic liver resection: a review of current indications and surgical techniques"

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Hepatobiliary Surgery and Nutrition 2019年第1期8卷 84-84页

作者： Chenyang Jia Ningyuan Wen yonggang wei Department of Liver Surgery Center of Liver TransplantationWest China Hospital of Sichuan UniversityChengdu 610041China Medical School of Sichuan University Chengdu 610041China

After the Original Review entitled"Laparoscopic liver resection:a review of current indications and surgical techniques"(1)was accepted for publication in February,2018 by HBSN,several important studies were published to update the advances in laparoscopic liver resection(LLR).Therefore,we consider it necessary to make a *** et al.(2)conducted a randomized controlled trial to compare laparoscopic and open liver resection(OLR)for colorectal liver metastasis,which might be the first accomplished large-scale RCT on LLR.A total of 280 patients were included,among whom 133 patients received LLR while others received open *** was found to be associated with less postoperative complications and more cost-effective,while the rate of free resection margins did not significantly *** provides high level and encouraging evidence to support LLR implementation.

关键词： resection Laparoscopic metastasis

Application of Projection Pursuit Evaluation Model Based on Real-Coded Accelerating Genetic Algorithm in Evaluating Wetland Soil Quality Variations in the Sanjiang Plain, China

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Pedosphere 2003年第3期13卷 249-256页

作者： FUQIANG XIEyonggang weiZIMIN SichuanUniversity Chengdu610065(China) HeilongjiangUniversity Harbin150080(China) NortheastAgriculturalUniversity Harbin150030(China)

A new technique of dimension reduction named projection pursuit is applied to model and evaluatewetland soil quality variations in the Sanjiang Plain, Helongjiang Province, China. By adopting the im-proved real-coded accelerating genetic algorithm (RAGA), the projection direction is optimized and multi-dimensional indexes are converted into low-dimensional space. Classification of wetland soils and evaluationof wetland soil quality variations are realized by pursuing optimum projection direction and projection func-tion value. Therefore, by adopting this new method, any possible human interference can be avoided andsound results can be achieved in researching quality changes and classification of wetland soils.

关键词： evaluation projection pursuit evaluation model real-coded acceleratinggenetic algorithm soil quality variations

A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： Zhi Li Yang wei Kang Zhou Xin Huang Xing Zhou Jie Xu Taoyi Kong Junwei Lucas Bao Xiaoli Dong yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （<0.7 V） and excellent cyclic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

Chemical interaction of Ce-Fe mixed oxides for methane selective oxidation

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Journal of Rare Earths 2014年第9期32卷 824-830页

作者：祝星杜云鹏王华魏永刚李孔斋孙令玥 State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Faculty of Chemical Engineering Kunming University of Science and Technology

Chemical interaction of Ce-Fe mixed oxides was investigated in methane selective oxidation via methane temperature programmed reduction and methane isothermal reaction tests over Ce-Fe oxygen carriers. In methane temperature programmed reduction test, Ce-Fe oxide behaved complete oxidation at the lower temperature and selective oxidation at higher temperatures. Ce-Fe mixed oxides with the Fe content in the range of 0.1~）.5 was able to produce syngas with high selectivity in high-temperature range （800-900 ~C）, and a higher Fe amount over 0.5 seemed to depress the CO formation. In isothermal reaction, complete oxidation oc- curred at beginning following with selective oxidation later. Ce~_xFexO2~ oxygen carriers （x5_0.5） were proved to be suitable for the selective oxidation of methane. Ce-Fe mixed oxides had the well-pleasing reducibility with high oxygen releasing rate and CO selec- tivity due to the interaction between Ce and Fe species. Strong chemical interaction of Ce-Fe mixed oxides originated from both Fe＊ activated CeO2 and Ce3＋ activated iron oxides （FeOm）, and those chemical interaction greatly enhanced the oxygen mobility and selectivity.

关键词： chemical interaction Ce-Fe mixed oxides methane selective oxidation rare earths

太阳能熔融盐热化学循环制氢和合成气反应体系研究

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太阳能学报 2008年第12期29卷 1528-1533页

作者：敖先权王华魏永刚昆明理工大学材料冶金工程学院昆明650093 贵州大学化学工程学院贵阳550003

提出了一种新型的太阳能加热熔融盐化学循环反应体系，整个过程分两步：第一步，利用熔融碱金属碳酸盐吸收、储备、传输太阳能，在熔融盐介质中CH4与金属氧化物MxOy，反应生成相应的金属和合成气；第二步，金属分解水产生氢气和相应MxO... 详细信息

提出了一种新型的太阳能加热熔融盐化学循环反应体系，整个过程分两步：第一步，利用熔融碱金属碳酸盐吸收、储备、传输太阳能，在熔融盐介质中CH4与金属氧化物MxOy，反应生成相应的金属和合成气；第二步，金属分解水产生氢气和相应MxOy，从而MxOy，又循环到第一步再利用。根据最小吉布斯自由能原理，采用化学热力学计算软件HSCChemistry5．1，对CH4与几种MxOy，气-固相反应的△G^o进行了计算和分析，进一步分析了在熔融碱金属碳酸盐（摩尔比为1：1的Na2CO3和K2CO3）体系中温度对反应产物平衡组分的影响。结果表明，理论上只有ZnO和SnO2适合该反应体系，其反应气体产物中合成气的量随反应温度的增加而增加，比较适宜的反应温度在1200K左右。计算结果表明100MW的太阳能能量系统至少可以提供每秒生产5．32kg液态金属Zn所需能量，实现每秒将3．6×10^4kJ的太阳能转化为化学能。

关键词：太阳能熔融盐氢合成气热化学循环