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Effect of preparation methods of aluminum emulsions on catalytic performance of copper-based catalysts for methanol synthesis from syngas

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Journal of Natural Gas Chemistry 2010年第5期19卷 487-492页

作者： Lili Wang Wen Ding Yingwei Liu weiping fang Yiquan Yang Department of Chemical and Biochemical Engineering College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 Fujian China Department of Chemistry College of Chemistry and Chemical Engineering and National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters Xiamen University Xiamen 361005 Fujian China

Various Cu/ZnO/Al2O3 catalysts have been synthesized by different aluminum emulsions as aluminum sources and their pertormances tor methanol synthesis from syngas have been investigated. The influences of preparation methods of aluminum emulsions on physicochemical and catalytic properties of catalysts were studied by XRD, SEM, XPS,N2 adsorption-desorption techniques and methanol synthesis from syngas. The preparation methods of aluminum emulsions were found to influence the catalytic activity, CuO crystallite size, surface area and Cu0 surface area and reduction process. The results show that the catalyst CN using the aluminum source prepared by addition the ammonia into the aluminum nitrate （NP） exhibited the best catalytic performance for methanol synthesis from syngas.

关键词： aluminum emulsion copper-based catalysts methanol synthesis Cu+/Cu0

Effect of Mg/Al atom ratio of support on catalytic performance of Co-Mo/MgO-Al_2O_3 catalyst for water gas shift reaction

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Journal of Natural Gas Chemistry 2009年第2期18卷 161-166页

作者： Yixin Lian Huifang Wang Quanxing Zheng weiping fang Yiquan Yang Department of Chemistry College of Chemistry and Chemical Engineering National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters Xiamen University Xiamen 361005 Fujian China

Co-Mo-based catalysts supported on mixed oxide supports MgO-Al2O3 with different Mg/Al atom ratios for water gas shift reaction were studied by means of TPR, Raman, XPS and ESR. It was found that the octahedral Mo species in oxidized Co-Mo/MgO（x）-Al2O3 catalyst and the contents of Mo^5＋, Mo^4＋, S^2- and S^2-2 species in the functioning catalysts increased with increasing the Mg/Al atom ratio of the support under the studied experimental conditions. This is favorable for the formation of the active Co-Mo-S phase of the catalysts. Catalytic performance testing results showed that the catalysts Co-Mo/MgO-Al2O3 with the Mg/Al atom ratio of the support in the range of 0.475-0.525 exhibited optimal catalytic activity for the reaction.

关键词： Co-Mo catalyst reduction sulfidation mixed support water gas shift

Study on Ni/C catalysts for vapor phase carbonylation of ethanol

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Journal of Natural Gas Chemistry 2008年第4期17卷 355-358页

作者： Qing Zhang Huifang Wang Guosong Sun Kelin Huang weiping fang Yiquan Yang College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 Fujian China Guangxi Research Institute of Chemical Industry Nanning 530001 Guangxi China

Activated carbon-supported Ni catalysts for vapor phase carbonylation of ethanol to propionic acid in the presence of ethyl iodide as promoter were investigated. Under optimum reaction conditions, the conversions of carbon monoxide and ethanol were measured to be 81.4% and 98.4%, respectively, while the selectivity for propionic acid was found to be 98.65%. The catalyst was stable within 48 h on stream. XRD and XPS methods were used to characterize the structures and surface properties of the fresh and tested catalysts. The characterization results indicated that aggregation of nickel particles and formation of nickel iodide on the catalyst surface should be responsible for the deactivation of the catalysts.

关键词： ethanol carbonylation nickel propionic acid deactivation

Visbreaking of heavy petroleum oil catalyzed by SO_(4)^(2-)/ZrO_(2)solid super-acid doped with Ni^(2+) or Sn^(2+)

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Frontiers of Chemical Science and Engineering 2008年第2期2卷 186-190页

作者： Ping JING Qingbiao LI Mei HAN Daohua SUN Lishan JIA weiping fang Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringKey Lab for Chemical Biology of Fujian ProvinceXiamen UniversityXiamen 361005China Department of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

SO_(4)^(2-)/ZrO_(2) solid super-acid catalysts(SZ)doped with Ni^(2+)or Sn^(2+)(Ni^(2+)/SZ,Sn^(2+)/SZ)were prepared for catalytic visbreaking of heavy petroleum oil from Shengli oil *** visbreaking reactions were carried out at 240uC and 3–4 MPa for 24 h using a heavy petroleum oil to catalyst mass ratio of 100:*** effect of water content on viscosity of heavy petroleum oil was also *** catalysts can promote thermolysis of heavy petroleum oil and the viscosity was reduced from 0.319 Pa·s to 0.135 Pa?s for Ni^(2+)/SZ and 0.163 Pa·s for(Sn^(2+)/SZ)with visbreaking rates of 57.7% and 48.9%,*** visbreaking,the saturated hydrocarbon content increased while aromatics,resin,asphaltene,sulfur and nitrogen content *** presence of water was disadvantageous to visbreaking of heavy petroleum oil.

关键词： heavy petroleum oil visbreaking nickel tin solid super-acid catalysis

Effect of Heat Treatments on Tribology Property of Ti6Al4V Alloy Under Dry Friction

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稀有金属材料与工程 2024年第8期53卷 2174-2181页

作者： Huang Junyuan Zhang Wei fang weiping Chen Jingyun School of Mechanical Engineering&Automation Beihang UniversityBeijing 100083China China-Ukraine Institute of Welding Guangdong Academy of SciencesGuangzhou 510650China Beijing Institute of Space Launch Technology Beijing 100076China

Ti6Al4V alloy manufactured by electron powder bed fusion(EPBF)was separately heat-treated by stress-relief annealing at 600℃,annealing at 800℃,and solid solution at 920℃ for 1 ***,the friction and wear tests were conducted on the samples before and after heat treatment to analyze the properties and mechanism of friction and wear *** show that the sample annealed at 600℃ for 1 h has the optimal wear resistance,and the wear mass loss reduces by 44%.The sample annealed at 800℃ for 1 h possesses the optimal anti-friction performance,and the coefficient of friction reduces by 14%.This research provides a simple heat treatment method to improve the friction and wear resistance of Ti6Al4V alloy manufactured by EPBF.

关键词： Ti6Al4V alloy electron powder bed fusion heat treatment anti-friction performance wear resistance

Water gas shift activity of Co-Mo/MgO-Al_2O_3 catalysts presulfided with ammonium sulfide

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Journal of Natural Gas Chemistry 2010年第1期19卷 61-66页

作者： Yixin Lian, Huifang Wang, weiping fang, Yiquan Yang Department of Chemistry, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen University, Xiamen 361005, Fujian, China [a] Department of Chemistry College of Chemistry and Chemical Engineering National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters Xiamen University Xiamen 361005 Fujian China

Co-Mo/MgO-Al2O3 catalyst was presulfided with ammonium sulfide in aqueous solution and activated with synthesis gas for water gas shift reaction. The assay results indicate that the presulfided Co-Mo/MgO-Al2O3 catalyst exhibits an excellent catalytic activity and stability. XRD and EPR characterization results show that the O-S exchange might occur during the impregnation, leading to the formation of （NH4）2MoS4 （or （NH4）zMoxSy） precursor, which was then thermally decomposed and reduced to MoS2. The higher catalytic performance is attributed to an optimization formation of active Co-Mo sulfides, consisting of well dispersed MoS2 and Co-Mo-S phase due to the redispersion of Co sulfide particles over the edges of newly formed MoS2 crystallites.

关键词： Co-Mo-based catalyst ammonium sulfide presulfidation water-gas shift

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BL-代数的直觉模糊滤子

纺织高校基础科学学报 2013年第3期26卷 306-312页

作者：房卫平西北大学数学系陕西西安710127

在BL-代数和直觉模糊集理论的基础上,应用直觉模糊集的方法,定义了BL-代数上直觉模糊滤子和直觉模糊素滤子.然后,讨论了直觉模糊滤子和直觉模糊素滤子的相关性质以及如何由直觉模糊集生成直觉模糊滤子的方法;最后,研究了BL-代数上的直... 详细信息

在BL-代数和直觉模糊集理论的基础上,应用直觉模糊集的方法,定义了BL-代数上直觉模糊滤子和直觉模糊素滤子.然后,讨论了直觉模糊滤子和直觉模糊素滤子的相关性质以及如何由直觉模糊集生成直觉模糊滤子的方法;最后,研究了BL-代数上的直觉模糊滤子的全体的代数结构.

关键词： BL-代数直觉模糊集直觉模糊滤子直觉模糊素滤子直觉模糊滤子格

媒介中的课艺：一个变革时代的文化现象及其历史解读--以早期《学生杂志》(1914-1918)为例

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浙江社会科学 2008年第6期 81-87页

作者：方卫平浙江师范大学儿童文化研究院、人文学院教授金华321004

在清代晚期至民国初期的近代社会变革和文化转型过程中,伴随着近现代中国教育观念、内容、制度等的巨大变革,中国近代的传播媒介也有了惊人的发展,并出现了大量以中小学学生为读者对象的学生杂志,其中尤以当时的商务印书馆创办的《学生... 详细信息

在清代晚期至民国初期的近代社会变革和文化转型过程中,伴随着近现代中国教育观念、内容、制度等的巨大变革,中国近代的传播媒介也有了惊人的发展,并出现了大量以中小学学生为读者对象的学生杂志,其中尤以当时的商务印书馆创办的《学生杂志》办刊时间最长。该杂志早期发表的诸多学生练习和习作,既以一种特殊的方式为中国教育史保存了当时曾经存在过的那些生动的课艺内容,展示了一代学生的集体性格与精神世界,同时它也成为了那个时代整个社会和教育变革、发展的一份生动、别致的历史档案。

关键词：《学生杂志》课艺媒介

商业文化精神与当代童年形象塑造——兼论中国当代儿童文学的艺术革新

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上海师范大学学报(哲学社会科学版) 2013年第4期42卷 108-115页

作者：方卫平浙江师范大学人文学院儿童文化研究院

20世纪70年代末以来的中国儿童文学经历了基础性的艺术话语变迁,在这一过程中,商业文化话语的影响不容忽视。从20世纪90年代起,中国城市生活题材儿童文学作品中的童年形象塑造越来越显示出商业文化精神的影响,它主要表现在儿童文学中童... 详细信息

20世纪70年代末以来的中国儿童文学经历了基础性的艺术话语变迁,在这一过程中,商业文化话语的影响不容忽视。从20世纪90年代起,中国城市生活题材儿童文学作品中的童年形象塑造越来越显示出商业文化精神的影响,它主要表现在儿童文学中童年形象的"日常化"、"肉身化"和"成人化"趋向。这类童年形象是对于传统儿童文学童年美学的一次积极和意义重大的解放,但它还有待于转化为对当代社会童年命运的更为深刻的思考。

关键词：童年形象商业文化童年美学