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Journal of Wuhan University of Technology(Materials Science) 2013年第1期28卷 62-68页

作者：刘汉桥 WEI Guoxia ZHANG Rui College of Energy and Safety Engineering Tianjin Institute of Urban Construction Key Laboratory for Solid Waste Management and Environment Safety Ministry of Education of China Tsinghua University

Production of glass-ceramics by sintering the molten slag obtained from electric arc furnace treatment of fly ash was investigated. The effect of washing pretreatment prior to melting the fly ash on the microstructure and properties of the glass-ceramics was examined. The results show that washing pretreatment of fly ash can decrease alkali metal chloride and increase network former in fly ash, which results in the increase of peak crystallization temperature of parent glass and strengthening of properties of bending strength and chemical stability of the glass-ceramics. The optimal heat treatment temperature for parent glass of washed fly ash is 1 173 K, at which the crystalline phase of glass-ceramics is composed of gelignite （Ca2A12SiO7） and akermanite （Ca2MgSi207）. Glass-ceramics produced at optimal heat treatment temperature are excellent in term of the physical and chemical properties and leaching characteristics, indicating attractive potential as substitute of nature materials.

关键词： waste incineration fly ash arc-melting glass-ceramics water washing

Emission Behaviors of Submicron Particles(PM_(1))Generated by the Combustion of Sesame Stalk after Combined water washing and Carbonization Pretreatment

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Energy Engineering 2021年第3期118卷 473-485页

作者： Tianyu Liu Chang Wen Wenyu Wang Kai Yan Yongjun Xia Rui Li Juan Liu Yang Zhang State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan430074China Department of New Energy Science and Engineering School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan430074China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and TechnologyWuhan430074China State Grid Jiangxi Electric Power Science Research Institute Nanchang330096China

Pretreatment before biomass combustion is significant for its efficient utilization and that combined water washing and carbonization can be *** agricultural processing residues sesame stalk was selected and carried out two pretreatments separately,i.e.,water washing-torrefaction(W-T)and torrefaction-water washing(T-W),to explore the effect on the fuel properties,combustion characteristics and particulate matter(PM)*** obtained biochar was also combusted under air and oxy50(CO_(2):O_(2)=50:50)conditions for the sake of investigating the effect of pretreatment and combustion *** results indicate that,W-T and T-W both not only have great effect on the improvement of fuel properties but also reduce the content of water-soluble elements like K,Cl,*** to the difference in hydrophobicity,the biochar obtained by W-T have the optimal fuel *** the same time,the pretreatment also hinder the combustion in a certain extent in which the comprehensive combustion characteristics(SN)show a downward ***,both two pretreatments have obvious benefit on the reduction of PM_(1)emission and W-T have the best effect related to the higher removal efficiency of inorganic elements(especially K+Na+Cl+S).Under oxy50 condition,the oxygen concentration and combustion temperature is higher,improving the sulfation of K and vaporization of Ca,P and Mg which result in weakening in the pretreatment reduction effect on PM_(1)emission.

关键词： Biomass torrefaction water washing oxy-fuel PM_(1)

CO_2 Removal from Biogas by water washing System

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Chinese Journal of Chemical Engineering 2014年第8期22卷 950-953页

作者：肖勇袁海荣庞云芝陈树林朱保宁邹德勋马晶伟郁亮李秀金 Centre for Resource and Environmental Research Beijing University of Chemical Technology Department of Biological Systems Engineering Washington State UniversityPullmanWA 99164USA

CO2 removal from biogas by water washing system was investigated with various parameters, including liquid/ gas ratio, pressure, temperature, and CO2 content. The results indicate that CO2 removal ratio could reach 34.6%- 94.2% as liquid/gas ratio increased from 0.14 to 0.50. Increasing pressure （from 0.8 to 1.2 MPa） could improve gas purification with a constant inflow rate of gas. Temperature played a key role in the process and lower temper- ature in absorption tower was beneficial for reducing CO2 content. CO2 removal ratio could reach 24.4%-83.2% when CO2 content in the simulated gas was 25%-45%. The lowest CO2 content after absorption was 2.6% at 1.2 MPa with 400 L·h-1 gas flow and 200 L·h-1 water flow, which meets the requirement of CO2 content in natural Ras for vehicle fuel.

关键词： Biogas purification C02 removal water washing Pilot system

A low-carbon strategy for revival of degraded single crystal LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)

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Rare Metals 2023年第2期42卷 459-470页

作者： Kai Yuan Rui-Qi Ning Li-Jiao Zhou Chao Shen Si-Si Zhou Jing Li Ting Jin Xiang-Gong Zhang Ke-Yu Xie State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an710072China Wuhan Institute of Marine Electric Propulsion China Shipbuilding Industry CorporationWuhan430064China Research and Development Institute of Northwestern Polytechnical University in Shenzhen Northwestern Polytechnical UniversityShenzhen518057China State Key Laboratory of Environment-Friendly Energy Materials School of Material Science and EngineeringSouthwest University of Science and TechnologyMianyang621010China

Single crystal LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)is currently widely used due to the outstanding cycle stability and ***,its sensitivity to the environment and the high residual alkali makes the electrochemical performance and processing property severely degraded after long-term storage,especially for the Ni-rich single crystal ***,it is highly urgent to develop a cost-effective strategy for the revival of degraded Ni-rich cathode ***,a low-carbon strategy is proposed to revive the degraded single crystal LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(SCNCM622)through water *** solid-liquid reaction mechanism of SCNCM622 and water was revealed and the strong dependence of the recovery effect on the washing time was *** optimized conditions,the sample with a washing time of 24 h shows 31.2%reduction in viscosity,18.4%improvement in discharge capacity,15.3%enhancement in cycle life,and excellent rate performance compared to the blank ***,this strategy can achieve higher utilization of single crystal Ni-based cathode materials with a lower cost.

关键词： Li-ion battery Ni-rich cathode materials Single crystal LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2) water washing Electrochemical performance

SO_2 poisoning and regeneration of Mn-Ce/TiO_2 catalyst for low temperature NO_x reduction with NH_3

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Journal of Rare Earths 2012年第7期30卷 676-682页

作者：盛重义胡宇峰薛建明王小明廖伟平 Research and Development Center Guodian Science and Technology Research Institute College of Energy and Mechanical Engineering Nanjing Normal University

SO2 poisoning and regeneration of Mn-Ce/TiO2 catalyst prepared by a novel co-precipitation method for low temperature selective catalytic reduction （SCR） of NOx with ammonia were investigated in this study. When 700 ppm SO2 was fed in, the Mn-Ce/TiO2 catalyst had good resistance to SO2, but the deactivation of Mn-Ce/TiO2 poisoned by SO2 still occurred. The NO conversion of Mn-Ce/TiO2 （the molar ra-tio of Ce to Ti is 0.075） catalyst decreased from 92.5% to 34.6% in 13 h. Characterizations of fresh and SO2-poisoned Mn-Ce/TiO2 catalysts were carried out by Brunauer-Emmett-Teller method （BET）, ion chromatography （IC）, X-ray photoelectron spectroscopy （XPS）, and X-ray diffraction （XRD）. The characterized results indicated that the deposition of sulfates and nitrates on the surface made the catalyst deactivated. water washing, thermal regeneration and reductive regeneration were used to regenerate the deactivated Mn-Ce/TiO2. And water washing showed best performance on the regeneration of poisoned catalysts, especially with ultrasonic vibration. The Mn-Ce/TiO2 catalyst showed high stability under a series of deactivation-regeneration experiments for ten cycles.

关键词： low temperature SCR Mn-Ce/TiO2 deactivation regeneration water washing rare earths

Re-Examination of the Oil and Gas Origins in the Kekeya Gas Condensate Field,Northwest China——A Case Study of Hydrocarbon-Source Correlation Using Sophisticated Geochemical Methods

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Acta Geologica Sinica(English Edition) 2017年第1期91卷 186-203页

作者： GONG Deyu WANG Zhaoyun LIU Gang CHEN Gang FANG Chenchen XIAO Zhongyao Research Institute of Petroleum Exploration and Development PetroChina Tarim Oilfield Company PetroChina

This work discussed the origins, alteration and accumulation processes of the oil and gas in the Kekeya gas condensate field based on molecular compositions, stable carbon isotopes, light hydrocarbons, diamondoid hydrocarbons and biomarker fingerprints. A comparison study is also made between the geochemical characteristics of the Kekeya hydrocarbons and typical marine and terrigenous hydrocarbons of the Tarim Basin. Natural gas from the Kekeya gas condensate field is derived from Middle–Lower Jurassic coal measures while the condensates are derived from Carboniferous–Permian marine source rocks with a higher maturity. In the study area, both natural gas and condensates have experienced severe water washing. A large amount of methane was dissolved into the water, resulting in a decrease in the dryness coefficient. water washing also makes the carbon isotopic compositions of the natural gas more negative and partially reverse. Considering that the gas maturities are higher than once expected, gas generation intensity in the study area should be much stronger and the gas related to the Jurassic coal measures could promise a greater prospecting potential. As a result of evaporative fractionation, the Kekeya condensates are enriched in saturates and lack aromatics. Evaporative fractionation disguises the original terrigenous characteristics of the light hydrocarbons associated with the natural gas, making it appear marinesourced. Thus, alteration processes should be fully taken into consideration when gas–source correlations are carried out based on light hydrocarbons. With the condensates discovered in the study area all being ＂migration phase＂, the pre-salt Cretaceous and Jurassic reservoirs may promise great exploration potential for the ＂residual phase＂ hydrocarbons. This research not only is of significance for oil and gas exploration in the southwest Tarim Basin, but also sheds light on the oil/gas-source correlations in general.

关键词： Kekeya gas condensate field evaporative fractionation water washing coal-derived gas marine condensates stable carbon isotopes diamondoid hydrocarbons

Recovery of titanium from undissolved residue(tionite) in titanium oxide industry via NaOH hydrothermal conversion and H_2SO_4 leaching

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Transactions of Nonferrous Metals Society of China 2016年第6期26卷 1696-1705页

作者：孟凡成薛天艳刘亚辉张国之齐涛中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室北京100190 中国科学院过程工程研究所绿色过程与工程院重点实验室北京100190 中国科学院大学北京100049

To recover titanium from tionite, a new process consisting of NaOH hydrothermal conversion, water washing, and H2SO4 leaching for TiO2 preparation was developed. The experimental results show that under the optimum hydrothermal conversion conditions, i.e., 50% NaOH （mass fraction） solution, NaOH/tionite mass ratio of 4：1, reaction temperature of 240 ℃reaction time of 1 h and oxygen partial pressure of 0.25 MPa, the titanium was mainly converted into Na2TiO3, and the conversion was 97.2%. The unwanted product Na2TiSiO5 remained stable in water washing, and its formation was prevented by improving NaOH concentration. In water washing process, about 97.6% of Na＋ could be recycled by washing the hydrothermal product. The NaOH solutions could be reused after concentration. 96.7% of titanium in the washed product was easily leached in H2SO4 solution at low temperatures, forming titanyl sulfate solution to further prepare TiO2.

关键词： tionite titanium recovery NaOH hydrothermal conversion water washing H2SO4 leaching