李钢
主要研究方向为含钛催化材料制备、催化氧化和油品氧化改质。
个性化签名
- 姓名:李钢
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
催化化学
- 研究兴趣:主要研究方向为含钛催化材料制备、催化氧化和油品氧化改质。
李钢,男,1971年生。1995年9月-2000年3月大连理工大学工业催化专业硕士、博士研究生(硕博连读),获工学博士学位。博士学位论文“钛硅分子筛的合成、表征及催化丙烯环氧化性能研究” 2003年入选“全国优秀博士学位论文”。
2000年4月留校任教,2002年10月晋升副教授。2004年12月?2005年12月,国家公派英国Cardiff大学化学系访问学者。2004年入选“辽宁省新世纪百千万人才工程”千人层次,入选首批教育部“新世纪优秀人才支持计划”。2006年1月晋升教授,2006年6月被评为博士生导师. 近年主要从事钛硅分子筛的合成、表征、成型和催化应用研究,参加和独立申请承担多项重要课题。建立了以TPABr为模板剂、硅溶胶为硅源的钛硅分子筛合成体系,成功放大至5m3规模,具备了工业化生产条件。作为主要完成人完成了国家基金委‘九五’ 重大项目子课题 “环氧丙烷钛硅沸石催化剂及反应过程的基础研究” (29792071),在2001年4月国家自然科学基金委组织的结题验收专家评审中,此课题技术水平被认定为国际先进水平。 2002年获中国石油和化学工业协会科技进步一等奖,排名第四。2003年获国家科技进步二等奖,排名第四。 1997年?2006年完成学术论文九十余篇,其中SCI收录33篇、EI收录33篇。申请中国发明专利12项,其中3项已授权。
现在主要研究方向为含钛催化材料制备、催化氧化和油品氧化改质。在研项目有高等学校全国优秀博士学位论文作者专项资金资助项目(200346)、国家自然科学基金青年基金(20406005)等。
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458
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成果数
10
【期刊论文】Epoxidation of propylene using supported titanium silicalite catalysts
李钢, 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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61浏览
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引用
李钢, 王祥生, 闫海生, 刘民, 刘毅慧, 陈永英
催化学报,2001,22(5):465~468,-0001,():
-1年11月30日
以四丙基溴化铵为模板剂,以硅溶胶为硅源,采用水热合成法制备了不同铝杂质含量的钛硅分子筛,并系统考察了铝杂质对钛硅分子筛性能的影响。结果表明,原料中的铝杂质可促进钛硅分子筛晶化,但同时也引入了酸性中心;在丙烯环氧化反应中,铝杂质形成的酸性中心会催化环氧丙烷与溶剂的副反应;加入少量碱性添加物可抑制铝杂质的酸催化作用,提高环氧丙烷的选择性,但过量碱性添加物会使钛硅分子筛失活。
钛硅分子筛, 铝杂质, 丙烯, 环氧化, 环氧丙烷, 丙二醇单甲醚, 丙二醇
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李钢, 王祥生, , 金长子, 李桂民
催化学报,2004,25(4):315~318,-0001,():
-1年11月30日
以十二胺(DDA)为模板剂,采用室温晶化合成了钛硅中孔分子筛Ti2HMS,并用XRD,IR,UV2Vis和N2吸附对分子筛 样品进行了表征,考察了配料硅/钛比、模板剂用量及晶化时间对合成分子筛的影响,结果表明,Ti2HMS分子筛具有大的比表面,孔径约为3nm。随着配料硅/钛比的降低,Ti2HMS分子筛的比表面积减小,进入骨架的钛量增多,且非骨架钛也增多。n(DDA)/n(SiO2)≤0122时,随着模板剂用量的减少,Ti2HMS分子筛的结晶度下降,骨架钛含量减少,非骨架钛含量增加。晶化时间在9~18h最佳。
钛硅分子筛, Ti2HMS分子筛, 合成, 表征, 十二胺
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【期刊论文】EFFECT OF SOLVENTS ON PROPENE EPOXIDATION CATALYZED BY TITANIUM SILICALITE
李钢, Gang Li a*, Jiwen Meng a, Xiangsheng Wang a, b and Xinwen Guo a, b
React. Kinet. Catal. Lett. Vol. 82, No.1, 73-80 (2004),-0001,():
-1年11月30日
Titanium silicalite was prepared using tetrapropylammonium bromide as a template. Propene epoxidation was studied on this catalyst using the mixtures of methanol with water or 2-propanol or acetone and the solvent effect was investigated systematically.
Propene, epoxidation, titanium silicalite, solvent effect
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【期刊论文】Titanium species in titanium silicalite TS-1 prepared by hydrothermal method
李钢, Gang Li a, *, Xiangsheng Wang a, Xinwen Guo a, Song Liu a, Qi Zhao b, Xinhe Bao b, Liwu Lin b
Materials Chemistry and Physics 71 (2001) 195-201,-0001,():
-1年11月30日
The titanium species existing in titanium silicalite TS-1, which is prepared by hydrothermal method, were investigated using chemical analysis, XRD, FT-IR, 29Si MAS NMR, UV-VIS, ESR. It has been observed that several kinds of titanium species may exist in titanium silicalite. The form that titanium atoms incorporate into the framework of titanium silicalite synthesized using etrapropylammonium bromide (TPABr) as template differs from that using the classical method. But, the symmetry of titanium silicalite changes from monoclinic to orthorhombic with the increase of titanium content in both methods. The Ti-O2-originated from framework titanium and H2O2 has the moderate stability and may be active site in oxidation reaction. TS-1 synthesized using TPABr as template does not contain anatase, but contains a kind of partly condensed titanium species with six-fold coordination. The titanium species may correspond to 270-280 nm band in UV-VIS spectra and also can form Ti-O2-. But, this kind of Ti-O2-is very stable and cannot be catalytic active site. So, the six-fold coordination titanium species may be inactive in both the oxidation reaction and the decomposition of H2O2. The hypothesis has been further proved by the phenomena that the titanium species is easily washed off using acid, and acid treating will not influence the catalytic performance of TS-1.
Titanium silicalite, TS-1 zeolite, Titanium species, UV-VIS spectra, ESR
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44浏览
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引用
李钢, 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 200 h 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】Effect of sodiumions on propylene epoxidation catalyzed by titanium silicalite
李钢, Gang Li a, *, Xiangsheng Wang a, Haisheng Yan a, Yongying Chen b, Quansheng Su b
Applied Catalysis A: General 218 (2001) 31-38,-0001,():
-1年11月30日
Propylene epoxidation catalyzed by titanium silicalite is easily influenced by acidic or basic impurities. The effect of sodium ions on the reaction was systematically investigated. It has been shown that a proper amount of sodium salt additive can inhibit the further reaction of propylene oxide (PO) with the solvent and can increase the selectivity of PO. But a slightly excessive amount of sodium salt can be a poison to the titanium silicalite catalyst. The sodium salt additive can accumulate on the catalyst in repeated runs of propylene epoxidation in an autoclave, so the catalyst may be poisoned if an equal amount of sodium salt is added in each run. The excessive sodium ions on titanium silicalite can deactivate the catalyst in calcination, while acid treating can restore the activity of titanium silicalite. If the propylene epoxidation is carried out in a fixed bed, the sodium ions on titanium silicalite can gradually come loose and the PO selectivity decreases with time on-stream. A small amount of supplement of sodium salt in the raw material can make the PO selectivity stable for a longer period.
Propylene, Epoxidation, Sodium ion effect, Titanium silicalite, TS-1
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李钢, Li Gang a, Guo Xinwen a, *, Wang Xiangsheng a, Zhao Qi b, Bao Xinhe b, Han Xiuwen b, Lin Liwu b
Applied Catalysis A: General 185 (1999) 11-18,-0001,():
-1年11月30日
Titanium silicalites have been synthesized in the TPABr
Titanium silicalite, TS-1, Template effect, Epoxidation, TPABr
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【期刊论文】Mild oxidation of thiophene over TS-1/H2O2
李钢, Lingyan Kong a, Gang Li a, *, Xiangsheng Wang a, b
Catalysis Today 93-95 (2004) 341-345,-0001,():
-1年11月30日
Titanium silicalite (TS-1) is used as catalyst in selective oxidation of thiophene by hydrogen peroxide at 333K. Fourier transform infrared (FT-IR) and UV-vis characterization shows the presence of framework titanium in all TS-1 samples we prepared with different SiO2/TiO2 ratio. Catalytic test over these catalysts confirms that framework Ti species does influence the oxidation of thiophene. The role of non-framework titanium was discussed by studying acid treating of the catalyst. If TS-1 is treated using HCl (2mol/1) four times, part of the non-framework titanium species will be washed off and the activity of the catalyst increases greatly. These results suggest that framework titanium was crucial for thiophene oxidation. Non-framework titanium is not the active site, but provides steric hindrance for this reaction. Obvious diffusive restriction on the thiophene oxidation was also observed when using TS-1 with different crystal size.
Titanium silicalite, Thiophene, Oxidation, Hydrogen peroxide, Oxidative desulfurization
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李钢, Lingyan Kong a, Gang Li a, a, *, Xiangsheng Wang a, b
Catalysis Letters Vol. 92, Nos. 3-4, February 2004,-0001,():
-1年11月30日
Thiophene is a typical thiophenic sulfur compound in gasoline. Using n-octane containing thiophene as the model compound, the oxidation of thiophene, which is a key step for the oxidative deep desulfurization of gasoline, was carried out to study the reactivity of thiophene in oxidation reactions. It has been observed that thiophene oxidation can occur using water or t-butanol as solvent. Kinetics of the reaction shows a pseudo-first-order toward thiophene or catalyst and a zero order toward hydrogen peroxide. The mechanism for this unique reaction was proposed as the activation of conjugated electron in thiophene ring.
thiophene, oxidation, titanium silicalite, hydrogen peroxide, desulfurization.,
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