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TITANIUM-CONTAINING ZEOLITES WITH MEL STRUCTURE PREPARED FROM [B]ZSM-11 BY GAS-SOLID ISOMORPHOUS REPLACEMENT

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Chinese Journal of Catalysis 1998年第1期 6-7页

作者： Zhang Fazhi, Guo Xinwen, wang xiangsheng (Open Laboratory of Comprehensive Utilization for Carbon Resources, Dalian University of Technology, Dalian 116012)

ＴＩＴＡＮＩＵＭＣＯＮＴＡＩＮＩＮＧＺＥＯＬＩＴＥＳＷＩＴＨＭＥＬＳＴＲＵＣＴＵＲＥＰＲＥＰＡＲＥＤＦＲＯＭ［Ｂ］ＺＳＭ１１ＢＹＧＡＳＳＯＬＩＤＩＳＯＭＯＲＰＨＯＵＳＲＥＰＬＡＣＥＭＥＮＴＺｈａｎｇＦａｚｈｉ... 详细信息

ＴＩＴＡＮＩＵＭＣＯＮＴＡＩＮＩＮＧＺＥＯＬＩＴＥＳＷＩＴＨＭＥＬＳＴＲＵＣＴＵＲＥＰＲＥＰＡＲＥＤＦＲＯＭ［Ｂ］ＺＳＭ１１ＢＹＧＡＳＳＯＬＩＤＩＳＯＭＯＲＰＨＯＵＳＲＥＰＬＡＣＥＭＥＮＴＺｈａｎｇＦａｚｈｉ，ＧｕｏＸｉｎｗｅｎ，ＷａｎｇＸｉ...

关键词： Ti ZSM 11 zeolite Gas solid isomorphous replacement Propylene Epoxidation

Reducing Olefins in FCC Gasoline by Isomerization and Aromatization over Modified Nano-ZSM-5

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催化学报 2003年第3期24卷 159-160页

作者： ZHANGPeiqing wangxiangsheng 等 StateKeyLaboratoryofFineChemicalsandInstituteofIndustrialCatalysts DalianUniversityofTechnologyDalian116012LiaoningChina StateKeyLaboratoryofFineChemicalsandInstituteofIndustrialCatalysts DalianUni

The rapid development of automobile and the greatly increased consumption of fuel have caused more and more serious air-pollution by the emission of tail gas~[1,2]. To reduce the emission of tail gas from gasoline-powered engines, governments all over the world have tightened regulations on the composition of gasoline and required the production and use of clean fuels via the reduction of sulfur and olefins in gasoline. A new standard of the composition of gasoline will soon become effective in our country in which the content of olefins must be under 35%(volume fraction, the same below)~[3]. However, approximately 80% of gasoline used in our country comes from FCC gasoline which contains olefins more than 50%. To decrease the content of olefins in gasoline, several measures have been developed, such as optimization of the FCC process, use of new FCC catalysts (GOR, LBO, RFG),hydrogenation, and so on. But the degree of reduction of olefins is not high(only by 6%-13%), and always accompanied by octane value decreasing. Therefore, it is urgent to develop a novel technique that can maintain the octane value while reducing the olefins in gasoline.

关键词：纳米分子筛 ZSM-5 催化剂 FCC汽油烯烃芳构化异构化

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立宪的国家理性及其中国问题

政法论坛 2017年第1期35卷 107-117页

作者：汪祥胜中国社会科学院法学研究所博士后流动站江苏科技大学马克思主义学院

立宪的国家理性是对工具主义的国家理性在价值上的缺失而作出的拯救,它表明国家安全和存续只是国家存在的"理由",在此基础上还需要有一个国家存在的"正当性"问题,那就是对个人自由和权利的保护。中国在建构立宪的国家理性中存在以下两... 详细信息

立宪的国家理性是对工具主义的国家理性在价值上的缺失而作出的拯救,它表明国家安全和存续只是国家存在的"理由",在此基础上还需要有一个国家存在的"正当性"问题,那就是对个人自由和权利的保护。中国在建构立宪的国家理性中存在以下两个问题:一是由于没有自然法、永恒法和自然权利的传统,缺乏充分理解个人自由和权利的价值背景;二是在内外交困的特殊情势下,"救国图存"和"国家富强"构成了国家存在的理由,自由和权利被当作是实现这一理由的技术或手段,而不是作为价值理性为工具主义的国家理性提供正当性基础。"推进国家治理现代化"和"维护宪法权威"既是针对中国问题作出的回应,也是对立宪的国家理性的谋划。

关键词：立宪的国家理性自然权利身体治理宪法权威

Highly Effective Propylene Epoxidation with Hydrogen-Oxygen Mixture over Ag/TS-1 Catalysts

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催化学报 2003年第5期24卷 319-320页

作者： wang Ruipu, HAO Jingquan, GUO Xinwen, wang xiangsheng (State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, Liaoning, China) Dalian University of Technology State Key Laboratory of Fine Chemicals Dalian 116012

Propylene oxide (PO) is one of the most important chemical feedstocks for producing polyether polyol polymers such as polyurethane. Commercially, PO is manufactured by either chlorohydrin or coproduction (Halcon) route. The chlorohydrin route generates chlorinated by-products, mainly dichloropropane and CaCl_2. The co-production route is capital intensive and its economics is linked to the economic fortunes of the by-products, namely styrene or tert-butyl alcohol.

关键词：氢氧混合体系 Ag/TS-l催化剂丙烯环氧化反应钛硅分子筛负载型银催化剂

SYNTHESIS OF CERIUM-CONTAINING HIGH SILICA ZEOLITES New Catalysts for Hydroxylation of Phenol

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Chinese Journal of Catalysis 1997年第3期 12-13页

作者： Guo Hongchen *, wang xiangsheng (Institute of Industrial Catalysts, Dalian University of Technology, Dalian 116012) Zou Bensan (Research Institute of Yanshan Petrochemical Corporation, Beijing 102550)

ＳＹＮＴＨＥＳＩＳＯＦＣＥＲＩＵＭ┐ＣＯＮＴＡＩＮＩＮＧＨＩＧＨＳＩＬＩＣＡＺＥＯＬＩＴＥＳＮｅｗＣａｔａｌｙｓｔｓｆｏｒＨｙｄｒｏｘｙｌａｔｉｏｎｏｆＰｈｅｎｏｌＧｕｏＨｏｎｇｃｈｅｎ＊，ＷａｎｇＸｉａｎｇｓｈｅｎ... 详细信息

ＳＹＮＴＨＥＳＩＳＯＦＣＥＲＩＵＭ┐ＣＯＮＴＡＩＮＩＮＧＨＩＧＨＳＩＬＩＣＡＺＥＯＬＩＴＥＳＮｅｗＣａｔａｌｙｓｔｓｆｏｒＨｙｄｒｏｘｙｌａｔｉｏｎｏｆＰｈｅｎｏｌＧｕｏＨｏｎｇｃｈｅｎ＊，ＷａｎｇＸｉａｎｇｓｈｅｎｇ（ＩｎｓｔｉｔｕｔｅｏｆＩｎｄｕ...

关键词： Cerium Incorporation High silica zeolite Hydroxylation Phenol

Synthesis of Titanium Silicalite-1 in the Presence of Tween 40

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催化学报 2003年第3期24卷 161-162页

作者： wangLiqin wangxiangsheng 等 DepartmentofChemicalEngineering QiqiharUniversityQiqihar161006HeilongjiangChina StateKeyLaboratoryofFineChemicals DepartmentofCatalyticChemistryandEngineeringDalianUniversityofT

Traditionally, the hydrothermal synthesis of titanium silicalite-1 (TS-1) needs a large amount of tetrapropyl ammonium hydroxide (TPAOH) as a template(n(TPAOH)/n(SiO_2)=0.4-1.0), and the crystallization time takes 10-30d~[1]. Recently, much attention has beenpaid to the modification of synthesis methods, and many improvements have been made~[2-7]. In this work, a new method was developed to synthesize nanometer-sized TS-1 in the presence of Tween 40 as surfactant, which is based on using a non-ionic surfactant to decrease the surfacetension of solution and to iduce the orientation of the template molecules~[8]. Using this method, the n(TPAOH)/n(SiO_2) can be decreased to 0.1-0.2, so the synthesis cost of TS-1 is less. Furthermore, the synthesis time can be shortened to 24h, the amount of anatase TiO_2 is reduced and the crystal size of TS-1 is more uniform. The synthesized TS-1 samples show excellent catalytic performance.

关键词：吐温40 钛硅分子筛合成催化剂

Multiple SiGe/Si layers epitaxy and SiGe selective etching for vertically stacked DRAM

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Journal of Semiconductors 2023年第12期44卷 133-140页

作者： Zhenzhen Kong Hongxiao Lin Hailing wang Yanpeng Song Junjie Li Xiaomeng Liu Anyan Du Yuanhao Miao Yiwen Zhang Yuhui Ren Chen Li Jiahan Yu Jinbiao Liu Jingxiong Liu Qinzhu Zhang Jianfeng Gao Huihui Li xiangsheng wang Junfeng Li Henry HRadamson Chao Zhao Tianchun Ye Guilei wang Key Laboratory of Microelectronics Devices&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China Beijing Superstring Academy of Memory Technology Beijing 100176China Research and Development Center of Optoelectronic Hybrid IC Guangdong Greater Bay Area Institute of Integrated Circuit and SystemGuangzhou 510535China Microelectronics Institute University of Chinese Academy of SciencesBeijing 100049China Hefei National Laboratory Hefei 230088China

Fifteen periods of Si/Si_(0.7)Ge_(0.3)multilayers(MLs)with various Si Ge thicknesses are grown on a 200 mm Si substrate using reduced pressure chemical vapor deposition(RPCVD).Several methods were utilized to characterize and analyze the ML *** high resolution transmission electron microscopy(HRTEM)results show that the ML structure with 20 nm Si_(0.7)Ge_(0.3)features the best crystal quality and no defects are *** Si_(0.7)Ge_(0.3)ML structures etched by three different methods were carried out and compared,and the results show that they have different selectivities and *** this work,the fabrication process influences on Si/Si Ge MLs are studied and there are no significant effects on the Si layers,which are the channels in lateral gate all around field effect transistor(L-GAAFET)*** vertically-stacked dynamic random access memory(VS-DRAM),it is necessary to consider the dislocation caused by strain accumulation and stress release after the number of stacked layers exceeds the critical *** results pave the way for the manufacture of high-performance multivertical-stacked Si nanowires,nanosheet L-GAAFETs,and DRAM devices.

关键词： RPCVD epitaxy SiGe/Si multilayers L-GAAFETs VS-DRAM

Shape-Selective Synthesis of 4,4′-Dimethylbiphenyl over Hydrothermally Treated HZSM-5 Catalysts

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催化学报 2003年第9期24卷 647-648页

作者： GUOXinwen wangxiangsheng SHENJianping SONGChunshan StateKeyLaboratoryofFineChemicals DalianUniversityofTechnologyDalian116012LiaoningChina DepartmentofEnergy~zndGeo-EnvironmentalEngineering ThePennsylvaniaStateUniversity209AcadeTnicProjectsBuildingUniversityParkPA16802USA

The shape-selective alkylation of polycyclic hydrocarbons is used to synthesize symmetric intermediates such as 4, 4'-dialkylbiphenyl (4, 4'-DABP) and 2, 6-dialkylnaphthalene (2, 6-DAN) which are important precursors of advanced polymer materials~[1]. The alkylation to prepare 4, 4'-DABP can be carried out using either a large group like isopropyl or a small group such as ethyl or methyl. However, it is difficult to selectively obtain 4, 4'-dimethylbiphenyl (4, 4'-DMBP) through the methylation of biphenyl (BP) and its derivatives~[2,3]. Recently, a break-thorough in the methylation of 4-methylbiphenyl (4-MBP) with methylation of 4,4'-DMBP was as high as 65% over HZSM-5 modified with inorganic P compounds and 80% over MgO-modified HZSM-5. However, the catalyst activity decreased with time on stream due to the formation of coke. it is known that hydrothermal treatment can remove framework aluminum from a zeolite and modified its properties. Catalysts modified in this way show improved stability as well as increased p-selectivity ~[6] in the alkylation of aromatics. This work reports the methylation of 4-MBP with methanol over hydrothermally treated HZSM-5.

关键词：水热处理 HZSM-5 分子筛催化剂择形催化合成 4,4′-二甲基联苯

Ti-HMS催化氧化脱除模拟燃料中的硫化物

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催化学报 2005年第7期26卷 567-570页

作者：王云李钢王祥生金长子大连理工大学催化化学与工程系辽宁大连116012

将噻吩、苯并噻吩、二苯并噻吩和4,6二甲基二苯并噻吩(DMDBT)分别溶于正辛烷配成模拟燃料,以TiHMS为催化剂,以H2O2为氧化剂,对模拟燃料的氧化脱硫进行了研究,考察了TiHMS的催化活性及硅/钛比和结晶度对催化剂活性的影响.结果表明,在TiHM... 详细信息

将噻吩、苯并噻吩、二苯并噻吩和4,6二甲基二苯并噻吩(DMDBT)分别溶于正辛烷配成模拟燃料,以TiHMS为催化剂,以H2O2为氧化剂,对模拟燃料的氧化脱硫进行了研究,考察了TiHMS的催化活性及硅/钛比和结晶度对催化剂活性的影响.结果表明,在TiHMS上硫化物氧化的难易顺序是由噻吩环上硫原子的电子云密度和硫化物分子的空间位阻共同决定的;氧化反应发生在分子筛孔道内,骨架钛原子为活性中心;DMDBT在TiHMS上的氧化脱除效果比在TS1,Tiβ或TiMCM41上好.随着TiHMS中硅/钛比的增大,DMDBT的脱除率降低;随着TiHMS分子筛结晶度的升高,DMDBT的脱除率升高.

关键词： Ti-HMS分子筛硅/钛比结晶度双氧水噻吩苯并噻吩二苯并噻吩二甲基二苯并噻吩氧化脱硫