STUDY ON ACOPPER MANGANESE OXIDE CATALYST FOR WATER GAS SHIFT REACTION

ＳＴＵＤＹＯＮＡＣＯＰＰＥＲＭＡＮＧＡＮＥＳＥＯＸＩＤＥＣＡＴＡＬＹＳＴＦＯＲＷＡＴＥＲＧＡＳＳＨＩＦＴＲＥＡＣＴＩＯＮＦｅｎｇＳｈｕｂｏ，ＬｉａｎｇＲｕｉ′ｅ，ＤｏｎｇＸｉａｎｄｅｎｇ，ＬｉｕＨｏｎｇｊｉｅ，ＭａＹｕｅ（ＨｅｂｅｉＩｎｓｔｉｔｕｔｅ...     

STUDY ON THE MANNICH-TYPE REACTION OF P-TOLUENESULFONAMIDE

ＳＴＵＤＹ ＯＮ ＴＨＥ ＭＡＮＮＩＣＨ－ＴＹＰＥ ＲＥＡＣＴＩＯＮ ＯＦ Ｐ－ＴＯＬＵＥＮＥＳＵＬＦＯＮＡＭＩＤＥ￥ＲｕＹｕＣＨＥＮ；ＱｉｎｇＤＡＩ（ＩｎｓｔｉｔｕｔｅｏｆＥｌｅｍｅｎｔｏ－ＯｒｇａｎｉｃＣｈｅｍｉｓｔｒｙ，ＮａｎｋａｉＵｎｉｖｅｒ...     

MONTE CARLO SIMULATION OF THE SURFACE REDOXMECHANISM OF WATER GAS SHIFT REACTION 2. KINETICS OF FORWARD WATER GAS SHIFT REACTION

IntroductionThewatergasshift(WGS)reaction,duetoitsimportanceinbothhydrogenproductionandenergytechnology,hasbeenwidelyinvestigated.Inourpreviousworkll],aMonteCarlomodelwasdevelopedtoinvestigatetheconversionofOH*toO*inthesuifaceredoxmechamsmofWGSreaction,an…     

A STUDY ON THE ACTIVITY OF Mo-Fe-S CLUSTER COMPOUNDS FOR CATALYTIC REDUCTION OF C_2H_2 AND ITS RELATION TO THE COMPOSITION AND STRUCTURE OF SUCH COMPOUNDS

Activity on catalytic reduction of C_2H_2 for seven Mo-Fe-S cluster compounds (I. (Et_4N_4)_4[Mo_2Fe_2S_(10)]·2CH_3OH, Ⅱ. Mo_2Fe_2S_4(S_2CNEt_2)_5·CH_3CN, Ⅲ. (Bu_4N)_3 [Mo_2FeS_8O]·Ⅳ·(Et_4N)_3[Mo_2FeS_8O_2], V. (Et_4N)_2[MoFeS_4(SCN)_2(OCH_3)_2]·3CH_3OH, Ⅵ. (Et_4N)_3[Mo_2FeS_8O(OCH_3)_2], Ⅶ. (Et_4N)_4Mo_2Fe_7S_(12)(SPh)_6·6CH_3OH), three Fe-S cluster compounds (Ⅷ.(Et_4N)_2[Fe_4S_4(S_2CNEt_2)_4], Ⅸ. (Bu_4N)_2[Fe_4S_3(SC(CH_3)_3)_4], Ⅹ. (Bu_4N)[Fe_2S_3(SCH_2Ph)_2]) and combination systems of related compounds, has been determined under anaerobic conditions at 25℃ and with KBH_4 as the reductant. In addition, at 15℃, under otherwise the same conditions, activity on catalytic reduction of C_2H_2 for different constituent systems from (NH_4)_2MoS_4 and FeCl_3 has also been determined.     

STUDY ON THE REACTION OF ACYLISOCYANATE AND ARYL UREA

Acyl isocyanate(Ⅰ) was synthesized by the reaction of acyl chloride with lead cyanate in dichloromethane, using pyridine as a catalyst. Then, adding aryl urea(Ⅱ) to acyl isocyanate, 1-acyl-5-aryl-biuret (Ⅲ) can be obtained. 14 compounds have been synthesized by this method.     

STUDY ON THE EFFECT OF POLYSTYRENE SULFONIC ACID MACROMOLECULES ON THE POLYMERIZATION OF ACRYLAMIDE

The effect of polystyrene sulfonic acid (PSSA) macromolecules on the polymerization of acrylamide (AM) has been studied. It was found that the rates of polymerization of AM were greatly increased in the presence of PSSA in the polymerization system.The maximum value of the rate of polymerization of AM was obtained when the ratio of [—SO_3H]: [AM] reached 3:1. When the insoluble crosslinked PSSA was used instead of the soluble one, this effect decreased considerably. The interaction between molecules of PSSA and AM was determined by infrared spectroscopy, elementary analysis and X-ray photoelectron spectroscopy. The combination form, —SO_3-NH_3~ CO—, formed between sulfonic group and amide group was found to be existed since the infrared absorption band of —NH_2 shifted from 3400cm~(-1) to 3150 cm~(-1), the binding energy of electron N_(18) changed from 399.7 eV to 401.3 eV, and the atomic ratio of N to S of the products was similar to the ratio of reagents. Based on these experimental results, the mechanism of AM polymerization in the presence of PSSA is proposed. The initial step is the combination of AM with sulfonic group to form —CONH_3~ , then followed by polymerization on the PSSA macromolecule. The role of PSSA on the polymerization of AM is discussed.     

EFFECT OF WATER ON THE OXIDATION OF METHANOL OVER ELECTROLYTIC SILVER

The mechanism of methanol adsorption induced by oxygen and the effect of water on the methanol oxidation on electrolytic silver have been studied by ultra-high vacuum temperature programmed reaction spectroscopy(TPRS), transient response method and isotopic exchange experiment. It has been found that oxygen adsorbed on silver can greatly promote methanol adsorption and can also react with methanol to produce water. Experimental results show that oxygen in the water comes from the adsorbed oxygen and hydrogen from the methyl and the hydroxyl in methanol. It has also been found that there exists competitive adsorption between water and oxygen on silver and water can increase the selectivity of methanol oxidation to formaldehyde. This result is consistent with the catalytic activities.     

THE ELECTROCATALYTIC ACTIVITY OF NiCo2O4 FOR THE OXYGEN EVOLUTION REACTION

A spinel oxide NiCo204 prepared by thermal decomposition isof very high activity for the oxygen evolution reaction(OER)in alkalinesolution.The oxygen evolution overpotential on NiCo204 is 0.252-0.262Vin 10 M NaOH solution at 343K and current density 100 mAcm~(-2).     

STUDY ON XPS OF IRON CATALYSTS

IntroduCtioniron-basedcatalystSareactiveinformingliquidfuelsfromthehydrogenationofCO[l~6].However,itiswellknownthatthepoisoningofironcatalystsespeciallythesulfurandoXygenisoneofthemostseriousdeactivationproblemsincommercialproduCtionofsubstitUtenatUralgas…     

STUDY ON LOW Ni CATALYST FOR METHANATION OF TOWN GAS

On the basis of the characterization of typical catalysts by activityevaluation,TPR,XRD and TEM,the effects of nickel content and promoterssuch as MgO,La_2O_3,and MnO_2 were discussed.Formation of MgNiO_2 by thecombination of promoter MgO with NiO increases the catalyst stability.Promot-er La_2O_3 is found well-distributed on the catalyst surface in the form of La_2O_3without any interaction with uther components.With physically scattering ef-fect,La_2O_3 can prohibit active component Ni from sintreing at high temperatureand then improve its thermal stability.It also affects the catalyst activity andreducibility.Introduction of La_2O_3 decreases the content of small Ni crystallite,and is helpful to the prohibition of carbon deposition.A new Ni-based town gasmethanation catalyst of low Ni content with high activity and high carbon depo-sition resistance is successfully developed in the laboratory.     

STUDY ON THE CATALYTIC REACTION OF ACETONE TO DIACETONE ALCOHOL

ＳＴＵＤＹＯＮＴＨＥＣＡＴＡＬＹＴＩＣＲＥＡＣＴＩＯＮＯＦＡＣＥＴＯＮＥＴＯＤＩＡＣＥＴＯＮＥＡＬＣＯＨＯＬＳｕｎＨｏｎｇｗｅｉ，ＨｅＦｅｉ，ＸｕＧｅｎｈｕｉ＊，ＭａＸｉｎｂｉｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｃａｌＥｎｇｉｎｅｒｉｎｇ，Ｔｉａｎ...     

THE EFFECT OF INCLUSION COMPOUNDS ON THE PHOTOPHYSICS AND PHOTOCHEMISTRY OF SCHIFF’s BASES

通过形成希夫碱分子与环糊精或脱氧胆酸的包合化合物的方法,不仅可以使一些固态时具有热致变色性质的希夫碱表现出光致变色的性质,延长光产物的寿命,而且也可以在室温下检测到具有光致变色性质的包合化合物的荧光。     

A QUANTUM CHEMISTRY STUDY ON THE SIZE-DEPENDENCE OF THE CHEMISORPTION OF AMMONIA AND CARBON MONOXIDE ON ALUMINUM CLUSTERS

The chemisorption intensities of NH_3 and CO on aluminum clusters A1_n(n=l-13)have been theoretically predicted by using CNDO/2 method and properly selecting the clusters'geometries.The results show that the chemisorptions of NH_3 and GO on Al_2,Al_6 and Al_12 aremagically stable and thus are in good agreement with the experimental results.In addition,anelectronic structure analysis is made to expound the nature of such a size effect.     

STUDY ON ACTIVITY OF CATALYSTS FOR HYDROLYSIS OF CARBON DISULFIDE AT LOW TEMPERATURE

lntroductionCS2,oneoforganicsulfurcompounds,existsinClauseeffiuent,petroleum,nauralgas,andvariousrawgasesmadefromcoal.TraceofCS2cangreatlyreducethecatalghcactivityardlifetimeofsomecatalystsaPpliedindownstreamprocesses,suchasthesynthesesofmethanol,arYunoniaandurea.TherearemmpsmallandmediumsizechemicalplantsinChina.Usingcoalasthcmainrawmaterialtoproducesynthesisgashasbecomeabasicpointoflong4ermpolicyforthoseplants.TheelednationofsulfurcomPoundsfromthesynthesisgas,however,isoneofthemainproble…     

STUDY ON THE INTERACTION OF Se AND ERYTHROCYTE MEMBRANE——EFFECT OF Se ON THE Na, K-ATPase ACTIVITY AND FLUIDITY OF ERYTHROCYTE MEMBRANES

The content of binding-Se in erythrocyte membrane may affect its structure and function. Decrease in So content will lead to a lower activity of Na, K-ATPase and lipid fluidity in ghosts, and a marked increase in Na, K-ATPase activity as well as lipid fluidity of erythrocyte membrane was observed by supplementation of low concentration of Na_2SeO_3 (0.03—0.3 ppm Se), in vitro. This effect was obvious only when the ghosts wore incubated with Se at 0—4°C for at least half an hour prior to assay.     

A STUDY ON THE STRUCTURAL EFFECT OF DOUBLE-BRIDGED CONJUGATIVE SYSTEMS

In this paper, the following carbonyl-imino bridged compounds and related analogs havebeen synthesized:X= C1, m = 0); and the structural effect of the carbonyl-imino bridges has been studied by means of the UV and other properties of the compounds. A new conception of conjugative segment is put forward. The structural bases for each of the three π-π* bands of (C) are ascertained and verified by modification on structure of segments, such as eliminating, merging, lengthening or shortening of segments. It is demonstrated that both bridges -CO-and -NH- can block the conjugated polarization of the whole molecule so as to form three segments S, M and L of which the λmax each exhibits relative independence. The electronic absorption peaks resulting from different segments can be readily recognized and the existence of each segment can be ascertained. This may provide a new way for structural analysis of bridged compounds.     

AB INITIO STUDY ON THE REACTION OF CH WITH NH3

ＡＢＩＮＩＴＩＯＳＴＵＤＹＯＮＴＨＥＲＥＡＣＴＩＯＮＯＦＣＨＷＩＴＨＮＨ３￥ＺｈｉＸｉａｎｇＷＡＮＧ；ＲｕｏＺｈｕａｎｇＬＩＵ；ＭｉｎｇＢａｏＨＵＡＮＧ；ＺｈｏｎｇＨｕａＹＵ（Ｄｅｐａｒｔｍｅｎｔｏｆｃｈｅｍｉｓｔｉｙ，ＢｅｉｊｉｎｇＮｏｒｍａｌＵｎ...     

AM1 METHOD STUDY ON THE REACTION OF OZONE WITH ETHYLENE

ＡＭ１ＭＥＴＨＯＤＳＴＵＤＹＯＮＴＨＥＲＥＡＣＴＩＯＮＯＦＯＺＯＮＥＷＩＴＨＥＴＨＹＬＥＮＥ￥ＳａｎＧｕｏＨＯＮＧ；ＳｈｅｎＷＡＮＧ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＪｉａｎｇｘｉＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙ，Ｎａｎｃｈａｎｇ３３００...     

THE THEORETICAL STUDY ON INTERSECTION POINT RULE FOR HOMOLOGUES IN GAS CHROMATOGRAPHY

The intersection point rule for homologues in gas chromatography was discovered manyyears ago,now more and more application and development are occurring in recent years~[2-6],but there are few systemic theoretical studies.In this paper,based on the basic equation of reten-tion values in gas chromatography,we prove the intersection point rule of homologues frommathematics,study the factors affecting intersection point position,give the physical meaning ofintersection point,and explain the experimental rules in references.