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Catalytic kinetics of dimethyl ether one-step synthesis over CeO_2–CaO–Pd/HZSM-5 catalyst in sulfur-containing syngas process

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Chinese Journal of Chemical Engineering 2016年第12期24卷 1735-1741页

作者： Ruizhi Chu wenxin hou Xianliang Meng Tingting Xu Zhenyong Miao Guoguang Wu Lei Bai School of Chemical Engineering and Technology China University of Mining & Technology Xuzhou 221116 China High-Tech Research Institute of China University of Mining and Technology Lianyungang 222000 China Department of Chemical and Biomedical Engineering West Virginia University Morgantown 26506 USA

CeO_2–CaO–Pd/HZSM-5 catalyst was prepared for the dimethyl ether(DME) one-step synthesis in a continuous fixed-bed micro-reactor from the sulfur-containing syngas. The catalytic stability over hybrid catalyst of CeO_2–CaO–Pd/HZSM-5 was investigated to ensure that the kinetics experimental results were not significantly influenced by induction period and catalytic deactivation. A large number of kinetic data points(40 sets) were obtained over a range of temperature(240–300 °C), pressure(3–4 MPa), gas hourly space velocity(GHSV)(2000–3000 L·kg^(-1)·h^(-1)) and H_2/CO mole ratio(2–3). Kinetic model for the methanol synthesis reaction and the dehydration of methanol were obtained separately according to reaction mechanism and Langmuir–Hinshelwood mechanism. Regression parameters were investigated by the method combining the simplex method and Runge–Kutta method. The model calculations were in appropriate accordance with the experimental data.

关键词： CeO_2–CaO –Pd/HZSM-5 catalyst DME One-step synthesis Catalytic kinetics Sulfur-containing syngas

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带激波针的高超声速飞行器多目标优化设计

战术导弹技术 2015年第2期 23-27,69页

作者：侯文新吴颂平北京航空航天大学航空科学与工程学院北京100191

为进一步提高激波针减阻和降热的效果,在i SIGHT优化平台的基础上,以阻力系数和热流最小为目标,对激波针外形进行了多目标优化设计,实现了整个优化流程的全自动进行。试验采用优化的拉丁超立方采样技术生成样本点,利用i SIGHT软件的集... 详细信息

为进一步提高激波针减阻和降热的效果,在i SIGHT优化平台的基础上,以阻力系数和热流最小为目标,对激波针外形进行了多目标优化设计,实现了整个优化流程的全自动进行。试验采用优化的拉丁超立方采样技术生成样本点,利用i SIGHT软件的集成功能,实现几何建模、网格划分、数值求解的自动化,并采用径向基神经网络建立近似模型。同时,使用NSGA-II算法进行多目标优化,获得了Pareto解集。最后通过对一个典型外形气动性能的数值求解,验证了此优化设计的优越性。

关键词：高超声速激波针多目标优化设计 iSIGHT

声带息肉切除术后麻醉复苏期的护理干预对策探析

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当代医学 2018年第23期24卷 51-53页

作者：侯文馨徐州市中心医院手术室江苏徐州221008

目的探析声带息肉切除术后麻醉复苏期患者采取临床护理干预的有效措施。方法对2015年9月~2018年1月本院接收的行声带息肉切除术治疗的患者72例作为参研样本,对其临床资料展开回顾性分析,所选患者麻醉苏醒期均采取护理干预,以维持其呼吸... 详细信息

目的探析声带息肉切除术后麻醉复苏期患者采取临床护理干预的有效措施。方法对2015年9月~2018年1月本院接收的行声带息肉切除术治疗的患者72例作为参研样本,对其临床资料展开回顾性分析,所选患者麻醉苏醒期均采取护理干预,以维持其呼吸道畅通与循环系统的稳定性。结果 72例患者接受全面细致的护理后,麻醉苏醒期生命体征处于平稳状态,未出现严重并发症,患者对护理的效果满意度高。结论对声带息肉切除术患者术后麻醉复苏期实施有效积极的护理干预能够降低并发症发生率,保障患者康复的效果,还可密切护患关系。

关键词：麻醉复苏期临床护理声带息肉切除术

阿尔都塞意识形态国家机器理论的两个要点及其启示

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马克思主义哲学研究 2022年第1期 337-342页

作者：侯文鑫曹歌吉林大学马克思主义学院人民出版社马列编辑一部

对于阿尔都塞意识形态国家机器理论的理解,以往学者的研究大多着重于对其本身的结构和机制的阐释,但在两个要点上有所忽视,从而将这一理论可能视为阿尔都塞整体理论体系中的一个独立部分,未能考量出它与整体理论体系发展各阶段的延续性... 详细信息

对于阿尔都塞意识形态国家机器理论的理解,以往学者的研究大多着重于对其本身的结构和机制的阐释,但在两个要点上有所忽视,从而将这一理论可能视为阿尔都塞整体理论体系中的一个独立部分,未能考量出它与整体理论体系发展各阶段的延续性与关联性,并由此误判了这一理论所具有的探索性和功能分量。这两个要点,均是在前提性意义上而言的:一个是生产关系的再生产,另一个是阶级立场。尤其是后者,表面上与阿尔都塞前期如《保卫马克思》中的理论有所区别,但在实质上,是阿尔都塞自身总问题的不断精确与推进:他始终关注的只是什么东西压抑、限制了人的能动性;他想告诉人们的其实是,要反抗某种压制你的东西,首先要知道这个东西是什么/你要反抗的是什么。正是在这个意义上,他提出了意识形态国家机器的理论:在资本主义发展到新的时期,这一辅助性国家机器,正在更多地起着决定性作用,并让人们能够无意识地顺从于占据统治地位的文化,从而对这一统治体系起着保障、维持和分泌的作用。

关键词：意识形态国家机器生产关系的再生产阶级立场文化领导权

助剂对Pd/γ-Al_2O_3催化剂一步法合成二甲醚反应稳定性的影响

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化工进展 2016年第8期35卷 2474-2479页

作者：褚睿智徐婷婷孟献梁吴国光侯文心中国矿业大学化工学院江苏徐州221008 中国矿业大学连云港徐圩新区高新技术研究院江苏连云港222000

采用浸渍法制备了一系列不同助剂下的负载型Pd/γ-Al_2O_3催化剂,考察了助剂类型对Pd/γ-Al_2O_3催化剂一步法合成二甲醚(STD)反应稳定性的影响规律;采用氮吸附、XRD、H_2-TPR及TG等多种表征手段考察了稳定性试验前后以及烧炭再生后催... 详细信息

采用浸渍法制备了一系列不同助剂下的负载型Pd/γ-Al_2O_3催化剂,考察了助剂类型对Pd/γ-Al_2O_3催化剂一步法合成二甲醚(STD)反应稳定性的影响规律;采用氮吸附、XRD、H_2-TPR及TG等多种表征手段考察了稳定性试验前后以及烧炭再生后催化剂的表面物化性质及结构变化。结果表明,助剂成分对Pd/γ-Al_2O_3催化剂的STD反应稳定性影响显著。相比Pd/γ-Al_2O_3催化剂,添加Ce O_2可以提高Pd在γ-Al_2O_3表面的分散度,但会覆盖表面的部分酸性位,一定程度上提高了催化剂的活性和稳定性,但仍存在Pd烧结和积炭现象;添加复合助剂Ce O_2-Zr O_2后形成的Ce-O-Zr固熔晶面能显著促进Pd均匀分散,提高催化剂的抗积炭能力和抗烧结能力,催化剂的活性和稳定性更高;经SO_4^(2–)改性后Pd/γ-Al_2O_3催化剂会因为表面积炭加剧和表面硫流失严重,中强酸酸性位减少而快速失活。Ce O_2-Zr O_2-Pd/γ-Al_2O_3催化剂经历20h的稳定性试验后CO转化率仍保持59%以上,二甲醚选择性65%以上,烧炭再生后催化活性恢复至新鲜催化剂的91.83%。

关键词： Pd/γ-Al2O3催化剂助剂制备稳定性失活一步法合成二甲醚合成气

Practical approach for detecting k-nonseparability of multipartite quantum states

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 32-48页

作者： Jie Guo Jinchuan hou Xiaofei Qi Kan He College of Mathematics Taiyuan University of Technology School of Mathematics and Statistics Shanxi University Key Laboratory of Complex Systems and Data Science of Ministry of Education Shanxi University

The instantaneous detection of entanglement in quantum states poses a significant challenge in the fields of quantum computation and quantum information, and there are no practical methods or tools to complete this task satisfactorily so far. We propose a sufficient and necessary criterion of k-nonseparability for any n-partite finite or infinite dimensional systems, 2 ≤ k ≤ n. This criterion serves as the foundation for a practical scheme designed to detect entanglement and k-nonseparability across multipartite finite-dimensional systems. To exemplify the application of our scheme, we have developed a software tool that facilitates swift and precise identification of entanglement, k-nonseparability, and genuine entanglement within n-qubit systems, specifically tailored for systems with 2 ≤ n ≤ 4.

关键词： multipartite systems entanglement states entanglement witnesses ${\bm~k}$-nonseparability

Low-temperature chlorination roasting technology for the simultaneous recovery of valuable metals from spent LiCoO_(2)cathode material

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 80-91页

作者： Junjie Shi Changle hou Jingjing Dong Dong Chen Jianzhong Li Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China

With the continuous increase in the disposal volume of spent lithium-ion batteries(LIBs),properly recycling spent LIBs has become essential for the advancement of the circular *** study presents a systematic analysis of the chlorination roasting kinetics and proposes a new two-step chlorination roasting process that integrates thermodynamics for the recycling of LIB cathode *** activation energy for the chloride reaction was 88.41 kJ/mol according to thermogravimetric analysis–derivative thermogravimetry data obtained by using model-free,model-fitting,and Z(α)function(αis conversion rate).Results indicated that the reaction was dominated by the first-order(F1)model when the conversion rate was less than or equal to 0.5 and shifted to the second-order(F2)model when the conversion rate exceeded *** conditions were determined by thoroughly investigating the effects of roasting temperature,roasting time,and the mass ratio of NH_(4)Cl to LiCoO_(2).Under the optimal conditions,namely 400℃,20 min,and NH_(4)Cl/LiCoO_(2)mass ratio of 3:1,the leaching efficiency of Li and Co reached 99.43% and 99.05%,*** of the roasted products revealed that valuable metals in LiCoO_(2)transformed into CoCl_(2) and ***,the reaction mechanism was elucidated,providing insights for the establishment of a novel low-temperature chlorination roasting technology based on a crystal structure *** technology can guide the development of LIB recycling processes with low energy consumption,low secondary pollution,high recovery efficiency,and high added value.

关键词： spent lithium-ion battery thermodynamics chlorination roasting kinetics circular economy

Defect Engineering with Rational Dopants Modulation for High‑Temperature Energy Harvesting in Lead‑Free Piezoceramics

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Nano-Micro Letters 2025年第3期17卷 87-101页

作者： Kaibiao Xi Jianzhe Guo Mupeng Zheng Mankang Zhu Yudong hou Key Laboratory of Advanced Functional Materials Ministry of EducationCollege of Materials Science and EngineeringBeijing University of TechnologyBeijing 100124People’s Republic of China

High temperature piezoelectric energy harvester(HTPEH)is an important solution to replace chemical battery to achieve independent power supply of HT wireless ***,simultaneously excellent performances,including high figure of merit(FOM),insulation resistivity(ρ)and depolarization temperature(Td)are indispensable but hard to achieve in lead-free piezoceramics,especially operating at 250°C has not been reported ***,well-balanced performances are achieved in BiFeO3–BaTiO3 ceramics via innovative defect engineering with respect to delicate manganese *** to the synergistic effect of enhancing electrostrictive coefficient by polarization configuration optimization,regulating iron ion oxidation state by high valence manganese ion and stabilizing domain orientation by defect dipole,comprehensive excellent electrical performances(Td=340°C,ρ250°C>10^(7)Ωcm and FOM_(250°C)=4905×10^(–15)m^(2)N^(−1))are realized at the solid solubility limit of manganese *** HT-PEHs assembled using the rationally designed piezoceramic can allow for fast charging of commercial electrolytic capacitor at 250°C with high energy conversion efficiency(η=11.43%).These characteristics demonstrate that defect engineering tailored BF-BT can satisfy high-end HT-PEHs requirements,paving a new way in developing selfpowered wireless sensors working in HT environments.

关键词： Lead-free piezoceramic Defect engineering Dopants modulation High-temperature Piezoelectric energy harvester

太赫兹光谱技术在表征双相无机钙钛矿材料特性中的应用

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半导体技术 2024年第7期49卷 682-688页

作者：常青程士嘉侯文鑫王引书北京师范大学珠海校区教务部实验教学平台广东珠海519087 北京师范大学珠海校区未来教育学院广东珠海519087 北京师范大学珠海校区文理学院广东珠海519087 南洋理工大学电子电气工程学院新加坡639798

钙钛矿材料制备过程中的成分监控与表征对材料科学与钙钛矿技术的发展至关重要。采用时间分辨太赫兹光谱(TRTS)技术对双相CsPbBr3-CsPb2Br5薄膜材料在光泵浦作用下的光致电导特性进行了详细分析。通过观察和区分不同成分的Cs-Pb-Br三元... 详细信息

钙钛矿材料制备过程中的成分监控与表征对材料科学与钙钛矿技术的发展至关重要。采用时间分辨太赫兹光谱(TRTS)技术对双相CsPbBr3-CsPb2Br5薄膜材料在光泵浦作用下的光致电导特性进行了详细分析。通过观察和区分不同成分的Cs-Pb-Br三元钙钛矿材料的光谱特征,确认了不同声子模式的来源。使用Drude-Smith模型的延伸模型对样品的光致电导进行拟合分析,进一步探究了薄膜材料的载流子动力学过程以及晶体结构的变化过程。本实验为太赫兹时域光谱技术在钙钛矿鉴别中的应用提供了新的视角,也为钙钛矿材料在光伏领域的潜在应用提供了坚实的理论依据。

关键词：钙钛矿时间分辨太赫兹光谱(TRTS) 载流子动力学光学声子光伏特性