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Catalytic Performance of MFI/MFI Core-Shell Zeolites in Benzene Methylation

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China Petroleum Processing & Petrochemical Technology 2014年第4期16卷 94-99页

作者： zhang baozhong Liu Xiaopeng General Research Institute for Nonferrous Metals SINOPEC Tianjin Company

Thanks to its 10-membered-ring structure with a three-dimensional uniform pore system and acid distribution, ZSM-5 zeolite is a key catalytic material for benzene methylation with methanol. After epitaxial inter-growth of a dense layer of shell consisting of nano-particles on the conventional ZSM-5 crystal surface, the MFI/MFI core-shell zeolite not only has much more active surface area, but also can enrich the diffusion and reaction pore system at the same time, which can significantly improve its catalytic performance. In contrast to the performance of conventional ZSM-5 catalyst, an indepth investigation on the reaction parameters of benzene methylation over the core-shell structured zeolite is of great significance.

关键词： core-shell zeolite, methanol, benzene methylation, process parameters

Improving mechanical properties and high-temperature oxidation of press hardened steel by adding Cr and Si

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1865-1875页

作者： Rong Zhu Yonggang Yang baozhong zhang Borui zhang Lei Li Yanxin Wu Zhenli Mi National Engineering Research Center for Advanced Rolling and Intelligent Manufacturing University of Science and Technology BeijingBeijing 102206China Manufacturing Management Department Ningbo Iron&Steel Co.Ltd.Ningbo 315800China Hunan Valin Lianyuan Iron and Steel Co. Ltd.Loudi 417009China

This work investigated the effect of Cr and Si on the mechanical properties and oxidation resistance of press hardened *** indicated that the microstructure of the Cr-Si micro-alloyed press hardened steel consisted of lath martensite,M_(23)C_(6)carbides,and retained *** retained austenite and carbides are responsible for the increase in elongation of the micro-alloyed *** addition,after oxidation at 930℃for 5 min,the thickness of the oxide scales on the Cr-Si micro-alloyed press hardened steel is less than 5μm,much thinner than 45.50μm-thick oxide scales on *** oxide scales of the Cr-Si micro-alloyed steel are composed of Fe_(2)O_(3),Fe_(3)O_(4),mixed spinel oxide(FeCr_(2)O_(4)and Fe_(2)SiO_(4)),and amorphous SiO_(2).Adding Cr and Si significantly reduces the thickness of the oxide scales and prevents the generation of the FeO *** to the increase of spinel FeCr_(2)O_(4)and Fe_(2)SiO_(4)phase in the inner oxide scale and the amorphous SiO_(2)close to the substrate,the oxidation resistance of the Cr-Si micro-alloyed press hardened steel is improved.

关键词： Cr-Si micro-alloyed press hardened steel mechanical properties oxidation resistance amorphous SiO_(2)

Establishment of soil moisture model based on hyperspectral data and growth parameters of winter wheat

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International Journal of Agricultural and Biological Engineering 2023年第3期16卷 160-168页

作者： Xizhi Lyu Weimin Xing Yuguo Han Zhigong Peng baozhong zhang Muhammad Roman Key Laboratory of State Forestry Administration on Soil and Water Conservation College of Soil and Water ConservationBeijing Forestry UniversityBeijing 100083China Yellow River Institute of Hydraulic Research Key Laboratory of the Loess Plateau Soil Erosion and Water Loss Process and Control of Ministry of Water ResourcesZhengzhou 450003China College of Hydraulic Science and Engineering Yangzhou UniversityYangzhou 225009China Forest Ecosystem Studies National Observation and Research StationJixianShanxi 042200China Key Laboratory of Non-point Source Pollution Control Ministry of Agriculture and Rural AffairsBeijing 100081China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China National Center of Efficient Irrigation Engineering and Technology Research-Beijing Beijing 100048China

Large area of soil moisture status diagnosis based on plant canopy spectral data remains one of the hot spots of agricultural ***,the existing soil water prediction model constructed by the spectral parameters without considering the plant growth process will inevitably increase the prediction *** study carried out research on the correlations among spectral parameters of the canopy of winter wheat,crop growth process,and soil water content,and finally constructed the soil water content prediction model with the growth days *** results showed that the plant water content of winter wheat tended to decrease during the whole growth *** plant water content had the best correlations with the soil water content of the 0-50 cm soil *** different growth stages,even if the soil water content was the same,the plant water content and characteristic spectral reflectance were also ***,the crop growing days parameter was added to the model established by the relationships between characteristic spectral parameters and soil water content to increase the prediction *** is found that the determination coefficient(R^(2))of the models built during the whole growth period was greatly increased,ranging from 0.54 to ***,the model built by OSAVI(Optimized Soil Adjusted Vegetation Index)and Rg/Rr,two of the highest precision characteristic spectral parameters,were selected for model *** correlation between OSAVI and soil water content,Rg/Rr,and soil water content were still significant(p<0.05).The R^(2),MAE,and RMSE validation models were 0.53 and 0.58,3.19 and 2.97,4.76 and 4.41,respectively,which was accurate enough to be applied in a large-area ***,the upper and lower irrigation limit of OSAVI and Rg/Rr were put *** research results could guide the agricultural production of winter wheat in northern China.

关键词： winter wheat canopy spectra growth process soil water content irrigation threshold soil moisture model prediction

热塑性淀粉含量对PBST复合材料及薄膜性能的影响

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塑料工业 2024年第7期52卷 155-161,173页

作者：张宝忠中国石油化工股份有限公司天津分公司研究院天津300271

为了研究不同热塑性淀粉(TPS)添加量对聚丁二酸丁二醇酯-对苯二甲酸丁二醇酯(PBST)/TPS体系结晶行为和成膜性能的影响,将TPS作为填充物,PBST作为基体,通过熔融共混制备PBST/TPS复合材料。研究发现TPS可以加速PBST的结晶,但PBST的结晶度... 详细信息

为了研究不同热塑性淀粉(TPS)添加量对聚丁二酸丁二醇酯-对苯二甲酸丁二醇酯(PBST)/TPS体系结晶行为和成膜性能的影响,将TPS作为填充物,PBST作为基体,通过熔融共混制备PBST/TPS复合材料。研究发现TPS可以加速PBST的结晶,但PBST的结晶度会随着TPS含量的增加而降低。随着TPS含量的上升,复合材料的黏度逐渐变大,流动性逐渐变差,而当TPS质量份到达40份时,复合材料的旋转流变和拉伸流变特性发生突变使用吹膜成型的方式制备复合薄膜,少量TPS可以降低复合薄膜中PBST的结晶度并改善薄膜厚度稳定性,而当TPS添加到40份时,吹膜成型稳定性降低,薄膜厚度均匀性再度变差,其薄膜拉伸强度降低到只有PBST薄膜的33%。此外随着TPS质量份的上升,复合薄膜的吸水率逐渐上升,薄膜透光率也逐渐下降。

关键词：聚丁二酸丁二醇酯-对苯二甲酸丁二醇酯热塑性淀粉流变吹膜成型

基于Penman方法和互补原理的蒸散发研究历程与展望

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水利学报 2018年第9期49卷 1158-1168页

作者：韩松俊张宝忠中国水利水电科学研究院流域水循环模拟与调控国家重点实验室北京100038 国家节水灌溉北京工程技术研究中心北京100048

Penman方法和互补原理是蒸散发研究的两种主要理论方法,本文梳理了这两类方法的发展历程,对比了其概念和方法上的差异,讨论融合这两类方法的可能和前景。Penman方法从田间尺度蒸散发过程出发,从针对均一下垫面发展到强调空间变异规律和... 详细信息

Penman方法和互补原理是蒸散发研究的两种主要理论方法,本文梳理了这两类方法的发展历程,对比了其概念和方法上的差异,讨论融合这两类方法的可能和前景。Penman方法从田间尺度蒸散发过程出发,从针对均一下垫面发展到强调空间变异规律和植物生理生态行为对蒸散发的控制机制。互补原理从区域尺度蒸散发过程出发,从传统的线性互补关系发展到基于非线性函数的广义互补原理。Penman方法和互补原理分别侧重蒸散发的陆面过程和大气过程,未来需要融合这两类方法以提升对蒸散发的认识和研究水平。

关键词：蒸散发 Penman方法互补原理

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管材专用PE100-RC的结构与性能

合成树脂及塑料 2019年第2期36卷 49-52页

作者：张宝忠中国石油化工股份有限公司天津分公司研究院天津市300270

研究了国内外3种管材专用耐开裂PE100级聚乙烯(PE100-RC)的结构与性能,从而找出其性能上的差异。结果表明:进口PE100-RC1相对分子质量分布更宽,兼顾加工性能和力学性能;进口PE100-RC2刚性偏低,抗氧化性能优;优化工艺后的国产PN049-030-1... 详细信息

研究了国内外3种管材专用耐开裂PE100级聚乙烯(PE100-RC)的结构与性能,从而找出其性能上的差异。结果表明:进口PE100-RC1相对分子质量分布更宽,兼顾加工性能和力学性能;进口PE100-RC2刚性偏低,抗氧化性能优;优化工艺后的国产PN049-030-122RC刚韧平衡性能好,多分散指数提高,改善了管材的加工性能。PN049-030-122RC通过了8 760 h的耐慢速裂纹增长测试,成为国内首家应用于非开挖管道施工的原料;同时通过GB/T 17219—1998的检测,满足生活饮用水管的要求。

关键词： PE100级聚乙烯管材专用耐慢速裂纹增长性能耐开裂静液压强度非开挖

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大体积混凝土温度裂缝的控制

工业建筑 2007年第z1期37卷 951-953页

作者：张宝忠扬州牧羊钢结构工程有限公司扬州225127

大体积混凝土施工过程中,原材料的选用、配合比的确定、混凝土内部及表面的测温、降温和保养等几个方面应严格把好质量关,这样才能将大体积混凝土的内外温差控制在规范允许范围之内,避免混凝土温度裂缝的产生。

关键词：大体积混凝土温差温度裂缝测控

基于现代学徒制的高职商科专业人才培养路径研究

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中国高教研究 2016年第10期 103-106页

作者：张宝忠浙江商业职业技术学院院长教授浙江杭州310053

着力实施现代学徒制的人才培养模式是推进现代职业教育体系建设的重要举措,是提高技术技能人才培养质量的重要途径。针对工学结合不紧、校企合作不热等问题,在总结商科专业现代学徒制人才培养模式主要特点的基础上,分析商科专业现代学... 详细信息

着力实施现代学徒制的人才培养模式是推进现代职业教育体系建设的重要举措,是提高技术技能人才培养质量的重要途径。针对工学结合不紧、校企合作不热等问题,在总结商科专业现代学徒制人才培养模式主要特点的基础上,分析商科专业现代学徒制的主要模式,提出组建混合所有制二级学院、优化制度设计、锻造教练型师资团队、重构教学质量评价体系等方式,是提升高职商科专业技术技能人才培养质量的可行路径。

关键词：现代学徒制技能人才路径

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聚苯硫醚共混改性研究进展

精细石油化工 2023年第3期40卷 73-78页

作者：张宝忠中国石油化工股份有限公司天津分公司天津300271

综述了聚苯硫醚(PPS)共混改性方面的研究进展情况,简述了PPS与聚合物、纳米材料以及其他物质共混时性能的变化规律,叙述了不同材料对PPS性能的影响,指出了PPS应用改性方向。还对PPS共混改性的发展趋向进行评述。

关键词：聚苯硫醚共混改性复合材料