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Alleviation of the plastic deformation of gel ink under strong stress through an esterification of xanthan gum reinforcing its double helix structure

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Chinese Journal of Chemical Engineering 2024年第3期67卷 49-57页

作者： Xiaokun Li Mingyi Wang Zilu liu Song Yang Na Xu Wei Zhao Gan Luo shoujun liu College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China Shanxi Engineering Center of Civil Clean Fuel Taiyuan University of TechnologyTaiyuan 030024China Shanxi Coking Coal in Yuncheng Salt Refco Group Ltd. Yuncheng 044000China

As a natural organic polymer,xanthan gum(XG)can alleviate the plastic deformation of gel ink under strong stress and realize the reasonable regulation of the rheological properties of gel ***,as the double-helix structure connected by hydrogen bonds cannot resist the mechanical environment of strong stress,XG shows poor shear *** this study,a polymer gel with interpenetrating polymer network structure was prepared by esterifying XG,taking polystyrene maleic anhydride(SMA)as the *** addition to retaining the excellent rheological properties of XG,the generated polymer gel also exhibited high shear *** optimal addition amount of the esterification reaction modifier was determined as mXG:mSMA=5:3 according to the gel ink *** this amount,the viscosity of the modified xanthan gum(SXG)gel increased to 1578.8 mPa·s and 100.7 mPa·s at shear rates of 4 s1 and 383 s1,respectively,and the shear resistance increased more than 2 times compared to the unmodified *** is because of the ester bond formed by esterification that the reaction strengthens the interaction between molecular segments,enabling the new gel to resist to strong mechanical *** new polymer gel studied in this paper and the proposed mechanism of action provide new insights for the development of high-end gel ink and also provide theoretical support for the study of rheological properties of non-Newtonian fluids.

关键词： Gel ink Xanthan gum Esterification Simulation Shear resistance Gels

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Efficient hydrogen production from high-concentration aqueous formic acid over bio-basedγ-Mo_(2)N catalysts

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Carbon Resources Conversion 2024年第3期7卷 8-16页

作者： Zeyu liu Song Yang Yanyan Yang Wenyao Guo Jianfei Wang Bixi Wang Xin Gao Ting Wang shoujun liu Zhongliang Yu College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China School of Chemistry and Environmental Science Shangrao Normal UniversityShangrao 334001China Engineering Center of Civil Clean Fuel Taiyuan 030024China College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China School of Chemistry and Chemical Engineering Kunming UniversityKunming 650214China

Formic acid is regarded to be one of the most prospective hydrogen *** screening of the fitting non-noble-metal-based heterogeneous catalysts to substitute the expensive noble-metal-based ones for FA dehydrogenation is considered as a key to the commercial application for hydrogen ***,dehydrogenation of liquid neat FA achieved a gas production value of 1753.5 mL/gcat./h at 94℃by using a biomass-derivedγ-Mo_(2)N based catalyst synthesized from the earth-abundant molybdenum and soybean with a facile pyrolysis *** effect of material ratio,pyrolysis temperature on the catalytic performance of FA dehydrogenation were studied in *** particular,the catalyst obtained at a pyrolysis temperature of 700℃,weight ratios of ammonium molybdate to soybean of 0.2/1 exhibited the highest *** addition,the catalytic activity increased with the increase of FA concentration,but conversely,the dehydrogenation selectivity decreased with the increasing FA ***,it was found that the Bio-Mo_(2)N catalyst was rather stable over the 40 h continuous reaction period.

关键词： Formic acid Non-noble-metal catalyst Dehydrogenation Hydrogen Molybdenum nitride

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大思政视域下军事体育课程思政设置构想

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当代体育科技 2024年第10期14卷 140-143页

作者：刘文强刘守君中国武警海警学院浙江宁波315800

大思政视野下军校军事体育课程思政设置,需对习近平总书记在全国高校思想政治工作会议上的讲话和军事体育课程教学中所蕴含的思政内涵进行深入分析,旨在增强立德树人的时效性,促进军校学员全面发展,推动军校教育内涵式发展。引导学员在... 详细信息

大思政视野下军校军事体育课程思政设置,需对习近平总书记在全国高校思想政治工作会议上的讲话和军事体育课程教学中所蕴含的思政内涵进行深入分析,旨在增强立德树人的时效性,促进军校学员全面发展,推动军校教育内涵式发展。引导学员在教学实践中反思,树立正确价值观,培养学员“一不怕苦,二不怕死”的战斗作风。大思政视野下军校军事体育课程思政的设置,应充分利用教育资源、借鉴优秀教学方法,不断增强思政内容在军事体育中的实用性与开放性,同时在军事体育教学过程中对军事体育课程思政设置进行探讨研究,以贯彻党的教育方针,达到为战育人,立德树人的目的。

关键词：课堂思政军事体育军校教育思政设置教学实践

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化学链合成氨中载氮体的设计与应用研究进展

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燃料化学学报（中英文） 2024年第4期52卷 512-524页

作者：巩宙婷张谭李娜杨言言刘守军郑劼余钟亮杨颂太原理工大学化学工程与技术学院山西太原030024 上饶师范学院化学与环境科学学院江西上饶334000 太原理工大学省部共建煤基能源清洁高效利用国家重点实验室山西太原030024 山西省民用洁净燃料工程研究中心山西太原030024

氨不仅是氮肥生产的主要原料,也是可再生能源储存与转化过程中的能源载体之一。因此,开发温和条件下的合成氨技术是近年来重要的研究课题。化学链合成氨技术通过载氮体的传递作用,将合成氨反应解耦为固氮与释氨等多步反应,具有操作简便... 详细信息

氨不仅是氮肥生产的主要原料,也是可再生能源储存与转化过程中的能源载体之一。因此,开发温和条件下的合成氨技术是近年来重要的研究课题。化学链合成氨技术通过载氮体的传递作用,将合成氨反应解耦为固氮与释氨等多步反应,具有操作简便、反应温和、能耗低等优点。载氮体作为化学链合成氨的关键,起到传递能量及氮物种的作用,目前,载氮体固氮效率低,极大地限制了化学链合成氨技术的发展。基于此,本工作对化学链合成氨中载氮体的设计与应用研究进行综述。首先,对载氮体的设计理论进行了归纳与总结;其次,介绍了载氮体的研究现状,重点对如何提高载氮体的产氨速率以及如何提升晶格氮利用率等问题进行了综述;最后,对化学链合成氨技术所面临的机遇与挑战进行了研究,为今后载氮体的设计与开发提供了参考依据。

关键词：合成氨化学链催化剂反应动力学过渡金属金属氮化物

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Role of iron-based catalysts in reducing NO_(x) emissions from coal combustion

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中国化学工程学报:英文版 2023年第7期59卷 1-8页

作者： Yuehua liu Lili Chen shoujun liu Song Yang Ju Shangguan State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024China Shanxi Engineering Center of Civil Clean Fuel Taiyuan University of TechnologyTaiyuan 030024China College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuan 030024China

Nitrogen oxide(NO_(x))pollutants emitted from coal combustion are attracting growing public *** the traditional technologies of reducing NO_(x) were mainly focused on terminal treatment,and the research on source treatment is *** paper proposes a new coal combustion strategy that significantly reduces NO_(x) emissions during coal *** strategy has two important advantages in reducing NO_(x) ***,by introducing iron-based catalyst at the source,which will catalyze the conversion of coke nitrogen to volatile nitrogen during the pyrolysis process,thereby greatly reducing the coke nitrogen *** second is de-NO_(x) process by a redox reaction between NO_(x) and reducing agents(coke,HCN,NH_(3),etc.)that occurred during coke *** to direct combustion of coal,coke prepared by adding iron-based catalyst has 46.1% reduction in NO_(x) *** determine the effect of iron-based additives on de-NO_(x) performance,demineralized coal(de-coal)was prepared to eliminate the effect of iron-based minerals in coal *** effects of iron compounds,additive dosages,and combustion temperatures on de-NO_(x) efficiency are systematically *** results revealed that the NO_(x) emission of the coke generated by pyrolysis of de-coal loaded with 3%(mass)Fe_(2)O_(3) decreases to 27.3% at combustion temperature of 900℃.Two main reasons for lower NO_(x) emissions were deduced:(1)During the catalytic coal pyrolysis stage,the nitrogen content in the coke decreases with the release of volatile nitrogen.(2)Part of the NO_(x) emitted during the coke combustion was converted into N_(2) for the catalytic effect of the Fe-based *** is of great practical value and scientific significance to the comprehensive treatment and the clean utilization process of coal.

关键词： NO_(x) Coal combustion Coal pyrolysis Fe2O3 catalyst

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浸渍活性炭吸附放射性碘甲烷后失活机理研究

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材料导报 2024年第7期38卷 226-230页

作者：张佳倩王坤俊杨超杨颂上官炬王冰凝刘守军太原理工大学省部共建煤基能源清洁高效利用国家重点实验室太原030024 太原理工大学化学工程与技术学院太原030024 山西省民用洁净燃料工程研究中心太原030024 中国辐射防护研究院环境工程技术研究所太原030006 太原理工大学环境工程学院太原030024

核电站通风净化系统采用浸渍活性炭(IMAC)吸收核反应所产生的放射性气态碘,以确保环境及人员安全。IMAC长时间连续使用后吸附效率明显下降。明晰IMAC的失活机理,对延长其使用寿命及后续高值化利用研究意义重大。选用基炭、浸渍活性炭、... 详细信息

核电站通风净化系统采用浸渍活性炭(IMAC)吸收核反应所产生的放射性气态碘,以确保环境及人员安全。IMAC长时间连续使用后吸附效率明显下降。明晰IMAC的失活机理,对延长其使用寿命及后续高值化利用研究意义重大。选用基炭、浸渍活性炭、失活活性炭为研究对象,分析了其微观形貌和物相组成,探讨了IMAC失活前后的变化规律,推断其失活机理。结果表明:IMAC主要活性组分三乙烯二胺(TEDA)部分与碘甲烷发生反应生成四铵盐,且TEDA易分解,含量减少90%以上。环境中的氧化性物质和IMAC表面含氧官能团对活性炭造成不同程度的氧化,同时微孔比表面积占总比表面积由85%下降至40%以下,碘甲烷吸附场所减少。以上原因造成IMAC表面结构改变,活性位点减少,导致其吸附效率下降。

关键词：浸渍活性炭碘甲烷三乙烯二胺(TEDA) 微孔失活

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基于神经网络-遗传算法的泵体零件热锻模具磨损与应力分析

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锻压技术 2024年第2期49卷 208-214页

作者：刘寿军肖开永牛腾王永王雷刚江苏大学材料科学与工程学院江苏镇江212013 昆山惠众机电有限公司江苏昆山215331

基于Archard磨损模型和BP神经网络-遗传算法,采用有限元模拟研究泵体零件锻造过程中工艺参数对模具的磨损深度及最大应力的影响规律。首先,选取锻造温度、预热温度、摩擦因数、硬度和下压速度进行5因素5水平正交试验,借助灰色关联的分... 详细信息

基于Archard磨损模型和BP神经网络-遗传算法,采用有限元模拟研究泵体零件锻造过程中工艺参数对模具的磨损深度及最大应力的影响规律。首先,选取锻造温度、预热温度、摩擦因数、硬度和下压速度进行5因素5水平正交试验,借助灰色关联的分析确定关键影响因子,即锻造温度和摩擦因数。然后,采用拉丁超立方抽样法对关键影响因子随机取样,并采用DEFORM软件进行模拟,再将锻造温度和摩擦因数作为输入,将磨损深度和最大应力作为输出,构建2×12×2的神经网络-遗传算法优化模型,确定最优锻造温度为481.6℃、摩擦因数为0.38,此时最小磨损深度为1.44×10^(-5) mm、最大应力为1362 MPa。最后,通过实际生产进行验证,得到磨损深度和最大应力的模拟值与预测值吻合,相对误差仅为0.7%和4.0%,主要磨损区域和应力分布情况与实际生产基本吻合,验证了优化模型的可行性。

关键词：神经网络遗传算法 Archard磨损模型锻造温度模具磨损深度

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Upconversion luminescence and temperature sensing performance of Er^(3+) ions doped self-activated KYb(MoO_(4))_(2) phosphors

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Journal of Rare Earths 2024年第8期42卷 1507-1513,I0004页

作者： Ye Tong Wenpeng liu shoujun Ding School of Microelectronics and Data Science Anhui University of TechnologyMaanshan243002China Advanced Laser Technology Laboratory of Anhui Province Hefei230037China Anhui Institute of Optics and Fine Mechanics Chinese Academy of SciencesHefei230031China

In this work,a series of self-activated KYb(MoO_(4))_(2) phosphors with various x at% Er^(3+) doping concentrations(x=0.5,1,3,5,8,10,15) was synthesized by the solid-state reaction *** phase structure of the as-prepared samples was analyzed by X-ray diffraction(XRD),XRD Rietveld refinement and Fourier transform infrared(FT-IR) *** as-prepared samples retain the orthorhombic structure with space group of Pbcn even Er^(3+) doping concentration up to 15 at%.High-purity upconversion(UC) green emission with green to red intensity ratio of 55 is observed from the as-prepared samples upon the excitation of 980 nm semiconductor laser and the optimum doping concentration of Er^(3+) ions in the self-activated KYb(MoO_(4))_(2) host is revealed as 3 at%.The strong green UC emission is confirmed as a two-photon process based on the power-dependent UC *** addition,the fluorescence intensity ratios(FIRs) of the two thermally-coupled energy levels,namely ^(2)H_(11/2) and ^(4)S_(3/2).of Er^(3+) ions were investigated in the temperature region 300-570 K to evaluate the optical temperature sensor behavior of the *** maximum relative sensitivity(S_(R)) is determined to be 0.0069 K^(-1) at300 K and the absolute sensitivity(S_(A)) is determined to be 0.0126 K^(-1) at 300 *** S_(A) of self-activated KYb(MoO_(4))2:Er^(3+)is almost twice that of traditional KY(MoO_(4))2:Er^(3+)/Yb^(3+)codoping *** results demonstrate that Er^(3+) ions doped self-activated KYb(MoO_(4))2 phosphor has promising application in visible display,trademark security and optical temperature sensors.

关键词： Er^(3+)ions doped KYb(MoO_(4))_(2) Self-activated phosphors Upconversion luminescence Solid-state reaction method Optical temperature sensors Rare earths

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Industrial Application of an Iron-Tolerant FCC Catalyst CMT-1HN

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China Petroleum Processing & Petrochemical Technology 2022年第3期24卷 61-66页

作者： liu Liqiang liu Qianqian Chen Zhenyu Ren Fei liu shoujun Zhu Yuxia SINOPEC Hainan Refining&Chemical Company Co. LtdYangpuHainan 578101 SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing 100083

CMT-1HN(catalyst with metal trap),the new iron-tolerant catalyst for fluidized catalytic cracking(FCC),has been successfully applied in the resid catalytic cracking unit of Sinopec Hainan Refinery and Chemical Co.,Ltd(HNRC).Two test runs were carried out to compare its performance with that of the catalyst used in the Base *** properties of the feedstocks and operating conditions were almost *** the first test run,the added iron on the catalyst reached 7628μg/g,and the total iron,nickel,vanadium,and calcium contents were equivalent to those in the base *** yield of“LPG+gasoline”increased by 0.65 percentage points,and that of dry gas decreased by 45%;the volume ratio of hydrogen to methane decreased by 9.33%.During the second test run using the upgraded CMT-1HN catalyst,the added iron on the catalyst reached 6579μg/g,and the total iron,nickel,vanadium,and calcium contents reached 23210μg/*** yield of“LPG+gasoline”increased by 1.15 percentage points,and that of dry gas decreased by 20%;the volume ratio of hydrogen to methane decreased by 20.67%.Industrial application of the CMT-1HN catalyst proved its strong tolerance to metal contamination,especially iron poisoning,as well as its strong bottom cracking ability,leading to improved product *** CMT-1HN,the tank-bottom crude at HNRC lying in storage since several years,which is the main source of iron contamination in the equilibrium FCC catalyst(FCC E-cat),can be continuously processed to ensure smooth and cost-effective execution of the process scheme in the refinery.

关键词： catalytic cracking iron poisoning catalyst

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A review on nitrogen transformation and conversion during coal pyrolysis and combustion based on quantum chemical calculation and experimental study

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Chinese Journal of Chemical Engineering 2021年第7期34卷 107-123页

作者： Tingting Jiao Huiling Fan shoujun liu Song Yang Wenguang Du Pengzheng Shi Chao Yang Yeshuang Wang Ju Shangguan State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024China Shanxi Engineering Central of Civil Clean Fuel Taiyuan University of TechnologyTaiyuan 030024China College of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030000China Taiyuan Green Coke Energy Co. Ltd.Taiyuan 030006China

The emission of NOx during coal combustion contributes to the formation of acid rain and photochemical smog,which would seriously affect the quality of atmospheric ***,the decrease of NOx is of great importance for improving the efficient utilization of *** present review comprehensively summarized the influence factors and mechanisms of migration and transformation of nitrogen during the coal pyrolysis and combustion based on experimental study and quantum chemical ***,in the process of pyrolysis:the occurrence state and transformation of nitrogen were *** influence of temperature,atmosphere,heating rate and catalyst on formation of NOx precursor and nitrogen migration path at the molecular level were summarized;Secondly,during the process of combustion:the influence of temperature,ambient oxygen concentration,physical structure of coal char,catalyst on heterogeneous oxidation of char(N)were summarized;The effects of char surface properties,catalyst and ambient atmosphere on heterogeneous reduction of NOx were also *** on the quantum chemical calculation,the reaction path of heterogeneous oxidation of char-N and heterogeneous reduction of NOx were described in *** studies focus more on the generation of HCN and NH3,but in order to reduce the pollution of NOx from the source,it is necessary to further improve the process conditions and the optimal formula of producing more N2 during pyrolysis,as well as clarify the path of the generation of *** study and quantum chemistry calculation should be combined to complete the research of directional nitrogen reduction during pyrolysis and denitration during combustion.

关键词： Coal combustion Pyrolysis Environment Nitrogen oxides Quantum chemical calculation

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