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A durable Ni/La-Y catalyst for efficient hydrogenation of γ-valerolactone into pentanoic biofuels

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Journal of Energy Chemistry 2022年第7期31卷 347-355,I0009页

作者： Jiang He Lu Lin Meng Liu caixia miao Zhijie Wu Rui Chen Shaohua Chen Tiehong Chen Yang Su Tao Zhang Wenhao Luo CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Heavy Oil Processing and Key Laboratory of Catalysis of CNPC China University of PetroleumBeijing 102249China Key Laboratory of Advanced Energy Materials Chemistry Nankai UniversityTianjin 300350China

Zeolite-supported metal catalysts containing hydrogenation centers and acid sites are promising in the chemoselective hydrogenation of biomass platform molecules into value-added chemicals and *** primary challenge of employing such bifunctional catalysts for biomass conversion lies in catalyst stability in the liquid phase under harsh conditions. Herein, we have prepared a Ni/La-Y nanocatalyst via an improved wet impregnation method. Compared with Ni nanoparticles on H-Y, La addition shows a significantly enhanced stability and performance in the continuous liquid-phase hydrogenation of γ-valerolactone(GVL) into ethyl pentanoate(EP) at 200 ℃ for 1000 h. Complementary characterization studies reveal that La addition in the metal/zeolite catalyst not only efficiently modulates the acid property of the zeolite to alleviate coke formation, but also suppresses zeolite dealumination and metal agglomeration and leaching upon catalysis over a 1000 h period. These findings provide an efficient approach for improving the stability of zeolite-supported bifunctional catalysts, leading to potential application in hydrogen-assisted biomass valorization under the liquid-phase conditions.

关键词： Nickel Zeolite Hydrogenation Stability Biofuel

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现代有轨电车系统特点及应用前景

都市快轨交通 2013年第3期26卷 9-12页

作者：苗彩霞上海市城市建设设计研究总院上海200125

阐述有轨电车的发展历程、系统特点及路权形式,结合苏州高新区规划的有轨电车案例,探讨现代有轨电车在城市交通中的作用和应用前景。最后得出结论:现代有轨电车作为新型绿色环保交通工具,能很好地适应大中城市的新城区、开发区及二级城... 详细信息

阐述有轨电车的发展历程、系统特点及路权形式,结合苏州高新区规划的有轨电车案例,探讨现代有轨电车在城市交通中的作用和应用前景。最后得出结论:现代有轨电车作为新型绿色环保交通工具,能很好地适应大中城市的新城区、开发区及二级城市的骨干网络交通,其断面布置灵活,能很好地与城市的道路交通体系衔接,具有良好的经济性和应用前景。

关键词：现代有轨电车系统特点适用性节能路权

Creating one-line hybrid crops by synthetic apomixis

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Molecular Plant 2024年第1期17卷 16-18页

作者： Ronghong Liang caixia Gao New Cornerstone Science Laboratory Center for Genome EditingInstitute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing100101China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing100049China

Hybrid breeding plays an important role in increasing crop yields by taking advantage of hybrid vigor,which helps crops grow with superior yields across various climates and contributes to ensuring secure food *** seed production is relatively straightforward and simple in cross-pollinating plants such as maize but is difficult in self-pollinating plants such as rice,wheat,and ***,breeders have developed a three-line breeding strategy,utilizing a sterile line,a maintainer line,and a restorer line,for breeding hybrid rice(Figure 1A;Yuan,1966).

关键词： breeding crops sterile

Self assembled electron blocking and lithiophilic interface towards dendrite-free solid-state lithium battery

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Chinese Chemical Letters 2024年第4期35卷 220-225页

作者： caixia Li Yi Qiu Yufeng Zhao Wuliang Feng Institute for Sustainable Energy&College of Sciences Shanghai UniversityShanghai 200444China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

The poor interfacial contact is one of the biggest challenges that solid-state lithium batteries suffer *** the solid-state electrolyte surface energy by transforming the interface from lithiophobic to lithiophilic is effective to promote the interfacial contact, but electronic conductive interphases usually increase the risk of electron attack, thus leading to uncontrollable Li dendrite growth. Herein, we propose a self-assembled thermodynamic stable Li I interphase to simultaneously improve the interfacial contact between the garnet electrolyte Li_7La_(3)Zr_(2)O_(12)(LLZO) and Li anode, and prohibit the electron attack. The direct contact between LLZO and Li and the high temperature Li melting process was ascribed to Zr4+reduction, which facilitated Li dendrite formation and propagation. With the modification of the high lithiophilic I_(2) thin film, the area specific interfacial resistance of LLZO/Li was reduced from 1525 Ω/cm^(2) to 57 Ω/cm^(2). More importantly, LLZO was protected from being reduced due to the outstanding electronic insulativity of the Li I interphase, which leaded to a high critical current density of 1.2/7.0 m A/cm^(2) in the time/capacity-constant modes, respectively.

关键词： Li_7La_(3)Zr_(2)O_(12) LiI interphase Interfacial contact Li dendrite Thermodynamic stable

Application of DSAPSO Algorithm in Distribution Network Reconfiguration with Distributed Generation

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Energy Engineering 2024年第1期121卷 187-201页

作者： caixia Tao Shize Yang Taiguo Li School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou730070China

With the current integration of distributed energy resources into the grid,the structure of distribution networks is becoming more *** complexity significantly expands the solution space in the optimization process for network reconstruction using intelligent ***,traditional intelligent algorithms frequently encounter insufficient search accuracy and become trapped in local *** tackle this issue,a more advanced particle swarm optimization algorithm is *** address the varying emphases at different stages of the optimization process,a dynamic strategy is implemented to regulate the social and self-learning *** Metropolis criterion is introduced into the simulated annealing algorithm to occasionally accept suboptimal solutions,thereby mitigating premature convergence in the population optimization *** inertia weight is adjusted using the logistic mapping technique to maintain a balance between the algorithm’s global and local search *** incorporation of the Pareto principle involves the consideration of network losses and voltage deviations as objective functions.A fuzzy membership function is employed for selecting the *** analysis is carried out on the restructuring of the distribution network,using the IEEE-33 node system and the IEEE-69 node system as examples,in conjunction with the integration of distributed energy *** findings demonstrate that,in comparison to other intelligent optimization algorithms,the proposed enhanced algorithm demonstrates a shorter convergence time and effectively reduces active power losses within the ***,it enhances the amplitude of node voltages,thereby improving the stability of distribution network operations and power supply ***,the algorithm exhibits a high level of generality and applicability.

关键词： Reconfiguration of distribution network distributed generation particle swarm optimization algorithm simulated annealing algorithm active network loss

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丙烷脱氢反应Pt基催化剂研究进展

石油学报（石油加工） 2023年第3期39卷 690-702页

作者：苗彩霞刘萌吴志杰中国石油大学(北京)重质油国家重点实验室和CNPC催化重点实验室北京102249

丙烷脱氢(PDH)反应Pt基催化剂具有单程转化率高、丙烯选择性好、稳定性优异的特点。通过对PDH反应机理的阐述,分析了Pt基催化剂中各组分的协同作用机理和金属-载体强相互作用对金属烧结和积炭等催化剂失活行为的影响。详细概述了Pt基催... 详细信息

丙烷脱氢(PDH)反应Pt基催化剂具有单程转化率高、丙烯选择性好、稳定性优异的特点。通过对PDH反应机理的阐述,分析了Pt基催化剂中各组分的协同作用机理和金属-载体强相互作用对金属烧结和积炭等催化剂失活行为的影响。详细概述了Pt基催化剂的制备方法,包括后合成法(浸渍法、离子交换法、接枝法/锚固法、原子层沉积法)和原位合成法(共沉淀法、溶胶-凝胶法、原位水热法),以期通过Pt基催化剂活性中心构筑方法和技术来改进Pt基催化剂的失活行为,开发高活性、高选择性和高稳定性的Pt基催化剂。

关键词：丙烷脱氢 Pt基催化剂丙烯机理失活

Assessment of desertification sensitivity using an improved MEDALUS model in Northern China

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Research in Cold and Arid Regions 2024年第3期16卷 141-148页

作者： NingJing Tan caixia Zhang YingYing Wu ZhenTing Wang Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China University of Chinese Academy of Sciences Beijing 100049China Research Station of Gobi Desert Ecology and Environment Northwest Institute of Eco-environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China

Assessment of land sensitivity to desertification is an important step to support desertification monitoring and *** on the Mediterranean Desertification and Land Use(MEDALUS)model,we defined four quality indicators(soil,climate,vegetation and management)to evaluate the sensitivity of land in northern China to *** improved MEDALUS via excluding cities from the areas at risk of desertification by means of defining a threshold value for population *** framework,validated in northern China,further optimizes the model to link priority areas and land restoration programmed to support desertification *** found that the four indicators influenced and restricted each other,which jointly affected the distribution of desertification sensitivity in northern *** spatial distribution of sensitivity in northern China showed large regional differences,with clear boundaries and concentrated distributions of regions with high and low sensitivity;the overall sensitivity decreased,with some areas rated as having moderate,severe,and extremely severe sensitivity changing to slight sensitivity;and the influence weight was much higher for the management quality index than for the climate,vegetation,and soil *** suggests that management was the main factor that affected desertification sensitivity in northern China,and that climate factors exacerbated sensitivity,but the factors that are driving the spatial heterogeneity of the influencing factors need further study。

关键词： Desertification Sensitivity MEDALUS Factor analysis Northern China

Parameter matching and experiment of the combined cyclone separation and cylinder sieve cleaning system for rape combine harvester

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 128-136页

作者： Jiacheng Yuan Qingxi Liao Xingyu Wan Jia Yang caixia Shu College of Engineering Huazhong Agricultural UniversityWuhan 430070China Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River Ministry of Agriculture and Rural AffairsWuhan 430070China

Existing rape combine harvester with a cyclone separation cleaning device has the challenge that the loss rate and the cleaning rate increase and decrease simultaneously.A cleaning process route was proposed,which involves the cyclone separation cleaning device removing light and tiny impurities,and the cylinder sieve device removing coarse and long impurities such as pod shells and short stems.A novel cleaning system combining the cyclone separation cleaning device and cylinder sieve cleaning devices was *** ranges of the structure and operation parameters for each component were analyzed based on kinematics and dynamic analysis.A four-factor five-level quadratic orthogonal test was carried out,in which the loss rate and cleaning rate were taken as the evaluation *** velocity at the suction port,the rotation speed of the cylinder sieve,the screw pitch of the spiral blade and the diameter of the sieve hole were taken as the influencing *** orthogonal test results showed that the cleaning system performed best at a rotation speed of the winnower is 600 r/min,an airflow velocity at the suction port is 18.25 m/s,a rotation speed of the cylinder sieve is 87 r/min,a screw pitch of the spiral blade is 440 mm and a diameter of the sieve hole is 4.48 *** this time,the loss rate of the cleaning system is 3.22%,and the cleaning rate is 95.67%.Compared to the conventional cyclone separation cleaning device,the loss rate is reduced by 2.17%and the cleaning rate is increased by 1.05%.This study can provide a reference for the optimal cleaning system design for rape combine harvesters.

关键词： agricultural engineering cleaning system cyclone separation cylinder sieve rapeseed combine harvester

Targeted genome duplications by amplification editing (AE)

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Science China Life Sciences 2024年

作者： Chao Sun caixia Gao New Cornerstone Science Laboratory Center for Genome Editing Institute of Genetics and Developmental Biology Chinese Academy of Sciences College of Advanced Agricultural Sciences University of Chinese Academy of Sciences

Ongoing advances in genomics and genetics have led researchers to highlight the significant role of large DNA structural variants (SVs) in genetic diversity. SVs are genomic sequence variants of various types, including insertions, deletions, inversions, translocations, and copy number variants (CNVs or duplications).

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