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Journal of Environmental Sciences 2010年第5期22卷 760-768页

作者： qinghai li,aihong meng,{2.,yanguo zhang department of thermal engineering,key laboratory for thermal Science and power engineering of the ministry of education of china.tsinghua {12.,beijing 100084,china. [a] department of thermal {2. Key Laboratory for Thermal Science power engineering of the {2. of education of china Tsinghua University Beijing 100084 China

The impact of moisture on the partitioning of the heavy metals including Pb,Zn,Cu and Cd in municipal solid waste （MSW） was studied in a laboratory tubular furnace.A thermodynamic investigation using CHEMKIN software was performed to compare the experimental *** waste,representative of typical MSW with and without chlorine compounds,was burned at the background temperature of 700 and 950°C,*** the absence of chlorine,the moisture content has no evident effect on the volatility of Pb,Zn and Cu at either 700 or 950°C,however,as flue gas moisture increasing the Cd distribution in the bottom ash increased at 700°C and reduced at 950°C,*** the presence of chlorine,the flue gas moisture reduced the volatility of Pb,Zn and Cu due to the transformation of the more volatile metal chlorides into less volatile metal oxides,and the reduction became significant as chlorine content *** Cd,the chlorine promotes its volatility through the formation of more volatile CdCl *** a result,the increased moisture content increases the Pb,Zn,Cu and Cd concentrations in the bottom ash,which limits the utilization of the bottom ash as a construction ***,in order to accumulate heavy metals into the fly ash,MSW should be dried before incineration.

关键词： heavy metals partitioning moisture chlorine municipal solid waste incineration

Selective hydrodeoxygenation of guaiacol to cyclohexanol using activated hydrochar-supported Ru catalysts

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Frontiers of Chemical Science and engineering 2024年第5期18卷 13-22页

作者： Kaile li Shijie Yu qinghai li {2. zhang Hui Zhou key laboratory for {2. Science and power engineering of ministry of education Beijing Key Laboratory of CO_(2) Utilization and Reduction TechnologyDepartment of Energy and Power EngineeringTsinghua UniversityBeijing 100084China department of Chemical and Biomolecular engineering National University of SingaporeSingapore117585Singapore

lignin,an abundant aromatic polymer in nature,has received significant attention for its potential in the production of bio-oils and chemicals owing to increased resource availability and environmental *** hydrodeoxygenation of guaiacol,a lignin-derived monomer,can produce cyclohexanol,a nylon precursor,in a carbon-negative and environmentally friendly *** study explored the porous properties and the effects of activation methods on the Ru-based catalyst supported by environmentally friendly and cost-effective *** selective cleavage of C_(ary)-O bonds was achieved under mild conditions(160°C,0.2.MPa H_(2.,and 4 h),and alkali activation further improved the catalytic *** characterization methods revealedthat hydrothermal treatment and alkali activation relatively contributed to the excellent performance of the catalysts and influenced their porous structure and Ru dispersion.X-ray photoelectron spectroscopy results revealed an increased formation of metallic ruthenium,indicating the effective regulation of interaction between active sites and *** synergistic approach used in this study,involving the valorization of cellulose-derived hydrochar and the selective production of nylon precursors from lignin-derived guaiacol,indicated the comprehensive and sustainable utilization of biomass resources.

关键词： hydrochar guaiacol cyclohexanol activation full-component utilization

New possibility for PET plastic recycling by a tailored hydrolytic enzyme

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Green Energy & Environment 2024年第2期9卷 163-165页

作者： Shijie Yu qinghai li yanguo {2. Hui Zhou key laboratory for {2. Science and power engineering of ministry of education Beijing Key Laboratory of CO_(2)Utilization and Reduction TechnologyDepartment of Energy and Power EngineeringTsinghua UniversityBeijing 100084China

Plastic waste puts a huge burden on the ecosystem due to the current lack of mature recycling ***(ethylene terephthalate)(PET)is one of the most produced plastics in the *** decomposition holds the promise of recovering monomers from PET plastic,and the monomers can be used to regenerate new PET ***,there are still limitations in the activity and {2. stability of the existing PET *** recent study by Lu et *** a novel PET hydrolase via machine learning-aided *** obtained PET hydrolase showed excellent activity and {2. stability in the hydrolysis of PET and is capable of directly degrading large amounts of postconsumer PET *** approach provides an effective method for recycling PET waste and is expected to improve the current state of plastic pollution worldwide.

关键词： Plastic waste Poly(ethylene terephthalate) Hydrolysis Machine learning Enzymatic depolymerization Hydrolases

CO_2.Mitigation in Coal Gasification Cogeneration Systems with Integration of the Shift Reaction, CO_2.Absorption and Methanol Production

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Journal of thermal Science 2004年第3期13卷 193-198页

作者： Yuanyuan DUAN Jin zhang key {2. of thermal Science and power engineering, department of thermal engineering, tsinghua university, beijing 100084, {12. key laboratory of {2. Science and power engineering Department of Thermal Engineering Tsinghua University Beijing China

Cogeneration of electricity and liquid fuel can achieve higher efficiencies than electricity generation alone in Integrated Gasification Combined Cycle (IGCC), and cogeneration systems are also expected to mitigate CO2.emissions. A proposed methanol-electricity cogeneration system was analyzed in this paper using exergy method to evaluate the specified system. A simple cogeneration scheme and a complicated scheme including the shift reaction and CO2.removal were compared. The results show that the complicated scheme consumes more energy, but has a higher methanol synthesis ratio with partial capture of *** those methanol and electricity cogeneration systems, the CO2.mitigation is not merely an additional process that consumes energy and reduces the overall efficiency, but is integrated into the methanol production.

关键词： cogeneration system methanol synthesis CO2 mitigation exergy analysis

Experimental study on drying of typical MSW under incinerator-like conditions

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Science china.Technological Sciences) 2007年第5期50卷 636-643页

作者： zhang yanguo1, CHEN MeiQian2, meng aihong1, li qinghai1 & CHEN YunXuan2 1 key laboratory for thermal Science and power engineering of ministry of education, tsinghua university, beijing 100084, china.2 School of Mechanical, Electronical and Control engineering, beijing jiaotong university, beijing 100044, china 1. key laboratory for {2. Science and power engineering of ministry of education Tsinghua University Beijing 100084 China 2. School of Mechanical Electronical and Control Engineering Beijing Jiaotong University Beijing 100044 China

In this paper, a series of experiments were conducted to investigate the drying of typical municipal solid wastes (MSW) in a muffle incinerator. From the experimental drying characteristic curves, the effects of temperature on drying process were observed to be more obvious in the low temperature region than in the high tem- perature region in muffle incinerator. At a specified drying temperature, drying time was highly dependent upon the packed waste thickness, having an exponent rela- tion with the thickness. When the drying temperature increased or the thickness of potato bulks was diminished, the maximum drying rate reduced. Based on the first-order reaction, activation energy (Ea), and factor A of potato and cabbage were determined.

关键词： drying, MSW, potato blocks, cabbage stems, temperature, dying rate

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氯化铷添加剂对钙钛矿太阳能电池性能的影响

清华大学学报（自然科学版） 2024年第5期64卷 879-888页

作者：高宇张衍国周会李清海清华大学能源与动力工程系热科学与动力工程教育部重点实验室北京100084

在钙钛矿前驱体溶液中加入添加剂,是改善钙钛矿薄膜质量、提高钙钛矿太阳能电池性能的重要手段。该研究采用氯化铷(RbCl)作为添加剂,通过扫描电子显微图像、 X射线衍射图谱、光致发光光谱等表征手段,研究了不同比例添加RbCl对钙钛矿薄... 详细信息

在钙钛矿前驱体溶液中加入添加剂,是改善钙钛矿薄膜质量、提高钙钛矿太阳能电池性能的重要手段。该研究采用氯化铷(RbCl)作为添加剂,通过扫描电子显微图像、 X射线衍射图谱、光致发光光谱等表征手段,研究了不同比例添加RbCl对钙钛矿薄膜形貌与结构的影响,并通过外量子效率测试等方法,比较了不同比例RbCl添加后的钙钛矿太阳能电池器件性能。结果表明:RbCl的添加有利于引导钙钛矿晶粒生长,增大晶粒尺度,形成致密薄膜,从而抑制界面处载流子复合。适量添加RbCl后,钙钛矿太阳能电池的光电转化效率从18.88%提升到2..06%,开路电压、短路电流密度和填充因子等参数均显著提高,钙钛矿太阳能电池性能得到明显改善。

关键词：钙钛矿太阳能电池氯化铷添加剂钙钛矿薄膜晶粒尺寸

Study on drying and combustion process in grate-CFB incinerator

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Science china.Technological Sciences) 2009年第5期52卷 1153-1160页

作者： qinghai li yanguo {2. MeiQian Chen aihong meng ChangHe Chen key laboratory for {2. Science and power engineering of ministry of education Tsinghua University Beijing 100084 China School of Mechanical Electronical and Control Engineering Beijing Jiaotong University Beijing 100044 China

The drying and combustion process in the combined grate and circulating fluidized bed (grate-CFB) municipal solid waste (MSW) incinerator was investigated experimentally and mathematically. The drying grate bed was simulated by a muffle furnace, which could be controlled at a constant temperature level. The kind of wastes, thickness of waste layer fed and temperature were chosen as the adjustable parameters to study their effect on the drying process. The experimental results indicated that the hydrophilic wastes were more difficult to be dried than the hydrophobic wastes. The higher the temperature is the easier the waste is to be dried. The thinner waste layer is favorable to drying the waste. The pyrolysis experiment in the furnace showed that the higher temperature level could reduce the conversion rate of carbon to carbon monoxide. The semi-empirical mathematical model that included the bed material distribution submodel, volatile matter release submodel, carbon particle combustion submodel and so on was proposed. A 2.0 t/d grate-CFB incinerator was modeled and the model predicted bulk density agreed with the measured value from industrial field test. The predicted flue gas (e.g. CO2./SUB>, CO) concentration deviated slightly from the industrial test data. The parameters and variables used in the model were determined by the experiments or practical field test. This model can be used to design the grate-CFB incinerator and guide its operation.

关键词： drying waste incineration grate-CFB combustion model

Effects of MTZs parameters during non-ablative fractional photothermolysis treatments:A numerical study

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Effects of MTZs parameters during non-ablative fractional ph...

Roadmap for rechargeable batteries:present and beyond

2.10亚洲光电子会议保健和生物医学光学分会场

作者： Jing-bo MA 1,2.Ji-zhuang zhang 3 1 Philips Research Asia Shanghai,2.02.3,PR {2.2.Ren Ji Hospital,Shanghai jiao Tong university,Shanghai 2.012.,PR {2.3 key laboratory for thermal Science and power engineering of ministry of {12.,department of thermal engineering,tsinghua university,beijing 100084,PR china

The novel method of non-ablative FP is acknowledged as an effective technique by offering significant clinical improvement while minimal risk of complications.A new time-dependent mathematical model was built up to investigate the photo-{2. interactions during FP *** this model,effects of treatment-affecting parameters,such as diameter,density and energy of the micro laser beam as well as skin cooling,were numerically *** photo-{2. behaviors with various treatment parameters were particularly discussed,based on which,a novel concept of programmable treatment procedure （PTP） was *** this technique,desired therapeutic outcomes may be obtained from personalized treatments.

关键词： non-ablative fractional photothermolysis microthermal treatment zones synergy effects of photo-thermal interactions numerical model programmable treatment procedure

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Science china.Chemistry 2024年第1期67卷 13-42页

作者： Sen Xin Xu zhang lin Wang Haijun Yu Xin Chang Yu-Ming Zhao {2. meng Pan Xu Chen-Zi Zhao jiahang Chen Huichao Lu Xirui Kong Jiulin Wang Kai Chen Gang Huang Xinbo zhang Yu Su Yao Xiao Shu-Lei Chou Shilin zhang Zaiping Guo Aobing Du Guanglei Cui Gaojing Yang Qing Zhao liubing Dong Dong Zhou Feiyu Kang Hu Hong Chunyi Zhi Zhizhang Yuan Xianfeng li Yifei Mo Yizhou Zhu Dongfang Yu Xincheng Lei jianxiong Zhao jiayi Wang Dong Su Yu-Guo Guo Qiang zhang Jun Chen li-Jun Wan CAS key laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China university of Chinese Academy of Sciences.beijing 100049 China Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China key laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China beijing key {2. of Green Chemical Reaction engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China State key laboratory of Chemistry and Uti{2.zation of Carbon-Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830046China department of Chemical engineering Shanghai Jiao Tong UniversityShanghai 200240China State key laboratory of Rare Earth Resource Uti{2.zation Changchun Institute of Applied ChemistryChangchun 130022China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China School of Chemical engineering and Advanced Materials The University of AdelaideAdelaide 5000Australia Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101China Frontiers Science Center for New Organic Matter Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China College of Chemistry and Materials Science Jinan UniversityGuangzhou 511443China tsinghua Shenzhen International Graduate School Tsinghua UniversityShenzhen 518055China department of Materials Science and engineering City University of Hong KongHong Kong 999077China Division of Energy Storage Dalian National Laboratory for Clean Energy(DNL)Dalian Institute of Chem

Rechargeable batteries currently hold the largest share of the electrochemical energy storage market,and they play a major role in the sustainable energy transition and industrial decarbonization to respond to global climate *** to the increased popularity of consumer electronics and electric vehicles,lithium-ion batteries have quickly become the most successful rechargeable batteries in the past three decades,yet growing demands in diversified application scenarios call for new types of rechargeable *** efforts are made to developing the next-generation post-li-ion rechargeable batteries,which include,but are not limited to solid-state batteries,lithium–sulfur batteries,sodium-/potassium-ion batteries,organic batteries,magnesium-/zinc-ion batteries,aqueous batteries and flow *** the great achievements,challenges persist in precise understandings about the electrochemical reaction and charge transfer process,and optimal design of key materials and interfaces in a *** roadmap tends to provide an overview about the current research progress,key challenges and future prospects of various types of rechargeable *** computational methods for materials development,and characterization techniques will also be discussed as they play an important role in battery research.

关键词： energy storage rechargeable batteries battery materials electrochemistry

Failure Analysis of Dissimilar Metal Welds between Ferritic Heat Resistant Steels and Austenitic Stainless Steels in power Plant

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Chinese Journal of Mechanical engineering 2024年第4期37卷 306-326页

作者： Xiaogang li Junfeng Nie Xin Wang Kejian li Haiquan zhang Institute of Nuclear and New Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of EducationTsinghua UniversityBeijing 100084China department of Mechanical engineering Tsinghua UniversityBeijing 100084China

This study analysed the failure of dissimilar metal welds(DMWs)between ferritic heat resistant steels and austenitic stainless steels and investigated its influencing factors by means of numerical simulation,microstructure characterization and mechanical property *** the long-term high-temperature service condition in practical power plant,the DMW failure mode was along the interface between nickel-based weld metal(WM)and ferritic heat resistant steel,and the failure mechanism was stress/strain concentration,microstructure degradation and oxidation coupling acting on the *** numerical simulation results show that interface stress/strain concentration was due to the differences in coefficient of {2. expansion and creep strength,and the degree of stress/strain concentration was related to service *** ferrite band formed at the WM/ferritic steel interface was prone to cracking,attracting the fracture along the *** interface crack allowed oxidation to develop along the WM/ferritic steel *** long-term service,the interface stress/strain concentration,microstructure and oxidation all evolved,which synergistically promoted interface failure of ***,only under the long-term service of low stress conditions could trigger the interface failure of ***,long-term service would reduce the mechanical strength and plasticity of DMW.

关键词： Dissimilar metal weld Failure Interface Stress/strain concentration Microstructure Oxidation