王祥生
环境友好钛硅催化剂、丙烯环氧化及纳米分子筛材料的研究
个性化签名
- 姓名:王祥生
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学术头衔:
博士生导师
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学科领域:
催化化学
- 研究兴趣:环境友好钛硅催化剂、丙烯环氧化及纳米分子筛材料的研究
王祥生,1934年11月生,男,1961年毕业于布拉格化工学院获博士学位。现为大连理工大学教授,博士生导师,工业催化剂研究所所长,兼任中国石油化工学会理事、石油学报(石油加工)和催化学报编委,大连化物所兼职研究员,辽宁省劳动模范,大连市特等劳动模范,同时享受国务院政府特殊津贴。多年来从事石油化学和分子筛催化教学和科学研究工作。在分子筛的择形催化和芳烃的催化转化领域取得了多项研究成果。70年代指导完成了“稀土Y型分子筛歧化催化剂移动床评价”、“制取对二甲苯新催化剂”两项国家级成果。进入80年代以来领导研究开发了多种芳烃选择烷基化,大都采用高硅沸石和稀土为主成份的催化剂体系,形成了特色并已有工业生产规模。90年代以来主要从事环境友好钛硅催化剂、丙烯环氧化及纳米分子筛材料的研究,已进入实用性开发。完成重大(重要)科研项目20余项。在“九五”期间作为课题负责人承担了国家自然科学重大基金子课题“环氧丙烷钛硅沸石催化剂及反应过程的基础研究(29792071)”,2001年结题时被评为‘特优’。“对二乙苯直接合成法技术开发”获北京市科技进步一等奖,中国石化总公司三等奖。“IDGA沸石及EA-8402沸石催化剂的研制及工业应用” 及“EA9506催化剂合成高纯度对二乙苯”均获国家教委科技进步二等奖。“择形催化转化沸石催化剂和技术的研究与开发”2002年获中国石油和化学工业协会科技进步一等奖。“高硅择形沸石的研制及其在烃转化中的应用”2003年获国家科技进步二等奖。90年以来在国内外刊物或学术会议上发表论文100余篇,专著(合著)两部,获得国家发明专利3项。
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王祥生, Xiang-sheng Wang*, Xin-wen Guo, Gang Li
Catalysis Today 74(2002)65-75,-0001,():
-1年11月30日
Titanium silicalite (TS-1)was successfully synthesized by using tetra-propylammonium bromide (TPABr) and n-butylamine as the template and the base, respectively. XRD, IR, SEM, 13C CP/MAS NMR, UV-VIS, and UV-Raman techniques were used to characterize the synthesized products. The results show that TS-1 has MFI structure with high crystallinity and large crystal size, and with two kinds of titanium species. Using epoxidation of propylene as the probe, the catalytic properties of TS-1 in the present work were investigated. The crystal size of TS-1 affects much the initial reaction rate of propylene oxide (PO) formation. The effects of reaction conditions on PO reveal that the PO formation is greatly influenced by the solvent and the solution pH value. Methanol is the most preferable solvent, and a portion of water (<30%) in solution does not have much impact on the reaction. Moreover, the addition of base used to neutralize the residual acidity of the catalyst favor the reaction, the catalyst shows high activity and selectivity upon the adequate amount of base and the catalyst can be used repeatedly without regeneration. In the fixed-bed reactor, using ammonium water as the neutralizer, after 200h of reaction, both the conversion and the utilization of H2O2 is about 95%, the selectivity of PO is about 90%.
TS-1, TPABr, Epoxidation of propylene, Solvent effect, Acid-base effect, Aging test
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【期刊论文】Epoxidation of propylene using supported titanium silicalite catalysts
王祥生, Gang Li*, Xiangsheng Wang, Haisheng Yan, Yihui Liu, Xuewu Liu
Applied Catalysis A: General 236(2002)1-7,-0001,():
-1年11月30日
The propylene epoxidation using supported titanium silicalite TS-1 catalyst was systematically investigated in a fixed bed reactor. Different supports such as SiO2 and Al2O3 were used and two molding methods were adopted to prepare the catalyst. Strip TS-1 catalyst of 1mm
Propylene, Epoxidation, Titanium silicalite, TS-1, Supported catalyst
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【期刊论文】Direct Synthesis ofpara-Diethylbenzene over Modified HZSM-5 Zeolites
王祥生, Wang Xiangsheng and Guo Hongchen
,-0001,():
-1年11月30日
The direct synthesis of para-diethylbenzene (PDEB) was achieved commercially via ethylation of ethylbenzene over EA catalysts (modified ZSM-5 zeolites). The preparations of EA catalysts by modifying micron-sized ZSM-5 zeolites and the performances of EA catalysts in industrial units are discussed. It is observed, that the PDEB selectivity of HZSM-5 can be enhanced by strengthening the channels' geometric constraints, decreasing the amount of strong acid sites and eliminating the external surface acid sites of H-type zeolites. And that with combined modifications, an all-sided adjustment of said parameters of HZSM-5 zeolites could be reached, which favors the preparation of commercial catalyst by allowing good activity and durability. Combined modifications also works well in elevating the PDEB selectivity ofnano-sized ZSM-5 zeolite, the promising candidate for a new generation ofpara-selective catalyst.
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【期刊论文】Synthesis, characterization and catalytic properties of low cost titanium silicalite
王祥生, Xiang-sheng Wang*, Xin-wen Guo
Catalysis Today 51(1999)177-186,-0001,():
-1年11月30日
The synthesis of titanium silicalite by two methods (gas-solid isomorphous substitution of Ti4+ for Si4+ and hydrothermal crystallization synthesis), aiming at decreasing its cost, and the characterization of the prepared catalyst are presented. In the hydrothermal crystallization synthesis method of titanium silicalite-1 (TS-1), TPABr can be used to replace TPAOH and the amount of TPABr can be decreased to 0.05 (TPA+/SiO2). Organic amine cannot act as a template in the presence of TPA+. It can only regulate the basicity of the gel. The order of the template effect of different templates is as follows: TPA+>TBA+>TEA+>>organic amine. In the preparation of titanium-containing zeolite by secondary synthesis, the nature of the precursor and the preparation conditions have great influence on the incorporation of titanium into the framework. The mechanism of gas-solid isomorphous substitution is proposed, and under its guidance, we have successfully prepared Ti-ZSM-5, Ti-ZSM-11, Ti-β, and Ti-mordenite. The synthesized titanium-containing zeolites have been evaluated through catalytic hydroxylation of phenol, oxidation of styrene and epoxidation of propylene with aqueous H2O2. Results show that the Ti-containing zeolites possess high activity both in hydroxylation, styrene oxidation and in epoxidation.
Titanium silicalite, Gas-solid isomorphous substitution, Synthesis, Template effect, Selective oxidation, Reaction mechanism
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【期刊论文】Ethylation of ethylbenzene to produce para-diethylbenzene
王祥生, Wang Xiangsheng, Wang Guiru, Guo Hongchen and Wang Xueqin
H. Chon, S.-K. Ibm and Y.S. Uh (Editors) Progress in Zeolite and Microporous Materials Studies in Surface Science and Catalysis. Vol. 105,-0001,():
-1年11月30日
taining 65% ethylene to produce diethylbenzene (DEB). Alkylation over the RE-Si-ZSM-5 catalysts yielded 95~98% P-DEB. The high para-setec-tivity is due to the reduction in acid strength within the pores and the reduction in acid sites on the crystal's external surface. These catalysts have good performance in the industrial application.
ZSM-5,, Ethylbenzene ethylation,, P-diethylbenzene
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【期刊论文】PHYSICOCHEMICAL FEATURES AND CATALYTIC PROPERTIES OF NANOCRYSTAL ZSM-5 ZEOLITES
王祥生, Xueqin Wang, Xiangsheng Wang, Hongchen Guo, and Guiyan Yu
,-0001,():
-1年11月30日
Nanocrystal (20nm) and microcrystal (10μm) ZSM-5 zeolites were synthesized by using the same gel composition. Results of characterization reveal that nanocrystal ZSM-5 with the morphology of polycrystalline grains has larger pore volume, higher adsorptioncapacity and larger surface area than microcrystal ZSM-5. High 2,2,3-trimethylbutane adsorption ability indicates the existence of secondary pores in nanocrystal grains. In nanocrvstal ZSM-5 zeolite the surface Si/Al ratio was close to the bulk Si/Al value. Catalytic action of nanocrystal HZSM-5 was studied for different reactions. In the alkylation of benzene with ethene, nanocrystal HZSM-5 displays higher activity and longer catalytic life than microcrystal HZSM-5, although higher amount of coke deposit is found on the former after reaction. In the ethylation of benzene (thiophene content 1000ppm) with ethylalcohol (95%) nanocrystal HZSM-5 demonstrats its high ability to resist sulfide poisoning. Catalytic alkylation of toluene with propene over HZSM-5 catalysts shows that nanocrystal zeolite exhibits high selectivity for alkylation.
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【期刊论文】苯-乙烯烷基化HzSM-5沸石催化剂积炭失活的研究Ⅰ. 不同晶粒大小沸石的合成及HZSM-5沸石的积炭过程
王祥生, 王学勤
石油学报(石油加工),1994,10(2):038~043,-0001,():
-1年11月30日
通过调变晶化条件合成出一系列晶粒大小不同的沸石。对其H型沸石进行了苯-乙烯烷基化快速失活反应考察。应用微反色谱仪、脉冲吸附量测定等方法研究了沸石积炭模型及机理。结果表明,小晶粒团聚体沸石除在晶体内、外表面积炭外,同时在晶粒间空隙处积炭;堵孔作用是大晶粒沸石失活的重要原因。
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【期刊论文】Side-chain alkylation of toluene with methanol on KX/KZSM-5 binary zeolite catalysts
王祥生, Xiangsheng Wang, Guiru Wang, Dongmin Shen, Chengbi Fu, and Ming Wei
ZEOLITES, 1991, Vol 11, March,-0001,():
-1年11月30日
The side-chain alkylation of toluene with methanol catalyzed by the modified binary zeolite catalysts of KX and Al2O3, KX, KY, KM, or KZSM-5 has been studied. It was found that the selectives of styrene increased with the partial charge on the (A104) tetrahedra in the second zeolite component. The KX/KZSM-5 binary zeolite catalysts had much higher activities than did the separate zeolite catalysts, and the catalytic properties were greatly improved after H3BO3 and KOH modifications. Comparing the alkylation data with the t.p.d, measurements of NH3 and C02, Sanderson's electronegativity, and the partial charge on the(A104) tetrahedra, it is concluded that the side-chain alkylation of toluene with methanol on the binary zeolite catalysts is an acid-base cooperative, selective reaction.
Zeolite, KX, KZSM-5, alkylation, toluene, methanol
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