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硫化镧
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  “硫化镧”译为未确定词的双语例句
     temperature dependence of the apparent desulfurationconstant of La: IgK_(LaS)~″=-2897/T-3.49;
     硫化镧在碳饱和铁水中标准生成自由能与温度的关系为:△G°_(LaS)=-10640O+33、81T(cal/mol)=-445180+141、46T(J/mol);
短句来源
     The effect of the presence of O2 and SO2 in the feed on the COS hydrolysis was studied over lanthanum oxysulfide and neodymium oxysulfide.
     研究了O_2和SO_2对氧硫化镧和氧硫化钕催化剂上COS水解反应的影响.
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  相似匹配句对
     Radiation Vulcanization of Natural Rubber Latex
     天然橡胶乳液的辐照硫化
短句来源
     On Radiation Vulcanization of Natural Rubber Latex
     天然橡胶乳液的辐射硫化
短句来源
     INTERNAL FRICTION AND MAGNETIC SUSCEPTIBILITY OF LANTHANUM
     的内耗和磁化率
短句来源
     Optical Absorption of Lanthanum-Boron-Silicate Glasses
     硼硅酸盐玻璃的光吸收
短句来源
     The N,N-diethyldithiocarbamic lanthanum compeund which promotes the rubber for crosslink has been studied by crosslinked time and the physical mechanical properties of the crosslinked rubber.
     本文研究了四(N,N-二乙基二硫代氨基甲酸)合二乙铵对橡胶的硫化促进性能。
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  lanthanum sulfide
Extrusion of Gallium Lanthanum Sulfide Glasses for Fiber-optic Preforms
      
Optical properties of and chemical bonds in lanthanum sulfide of variable composition
      


Desulfuration equilibria between La and S in carbon saturated liquidiron at 1300-1500℃ have been determined. Temperature dependence of desul-furation constant and other thermodynamic parameters of La are obtainedas follows: temperature dependence of desulfuration constant of La: IgK_(LaS)=-23257/T+7.39; temperature dependence of the apparent desulfurationconstant of La: IgK_(LaS)~″=-2897/T-3.49; temperature dependence of the stan-dard free energy of formation of LaS:△G_(Las)~0=-106400+33.81 T(cal/mol)=-445180+141.46T...

Desulfuration equilibria between La and S in carbon saturated liquidiron at 1300-1500℃ have been determined. Temperature dependence of desul-furation constant and other thermodynamic parameters of La are obtainedas follows: temperature dependence of desulfuration constant of La: IgK_(LaS)=-23257/T+7.39; temperature dependence of the apparent desulfurationconstant of La: IgK_(LaS)~″=-2897/T-3.49; temperature dependence of the stan-dard free energy of formation of LaS:△G_(Las)~0=-106400+33.81 T(cal/mol)=-445180+141.46T (J/mol); temperature dependence of the standard freeenergy of solution: △G°La(1)-[La]=15430-14. 11 T (cal/mol)=64560-59.04 T(J/mol): temperature dependence of the interaction coefficient e_S~(La)=-63684/T+14.99.

用直接法对1300~1500.℃碳饱和铁水中[La]-[S]平衡关系进行了研究。镧的脱硫常数与温度的关系为:lgK_(Las)=-23257T~(-1)+7、39,碳饱和铁水中镧的表观脱硫常数与温度的关系为:lgK″_(LaS)=-2897T~(-1)-3、49;硫化镧在碳饱和铁水中标准生成自由能与温度的关系为:△G°_(LaS)=-10640O+33、81T(cal/mol)=-445180+141、46T(J/mol);镧在碳饱和铁水中的溶解自由能与温度的关系为 △G°_(La)(1)-[La]=15430—14、11T(cal/mol)=64560-54、04T(J/mol);相互作用系数e_S~(La)与温度的关系为:e_S~(La)=63684T-1+14、99。碳对镧和硫的相互作用系数值的影响正负相反,随温度升高该影响渐小,在1600?℃时这正负影响接近抵消。

The effect of the presence of O2 and SO2 in the feed on the COS hydrolysis was studied over lanthanum oxysulfide and neodymium oxysulfide. When O2 concentration was below 2.0%, the activity was not affected and at the O2 concentration of 2.0% a conversion of over 90% could be obtained over both catalysts when the temperature was over 150 ℃. Thus, the rare earth oxysulfide catalysts showed to be obviously superior to the traditional Al2O3 or TiO2based catalysts with respect to the resistance to the poisoning...

The effect of the presence of O2 and SO2 in the feed on the COS hydrolysis was studied over lanthanum oxysulfide and neodymium oxysulfide. When O2 concentration was below 2.0%, the activity was not affected and at the O2 concentration of 2.0% a conversion of over 90% could be obtained over both catalysts when the temperature was over 150 ℃. Thus, the rare earth oxysulfide catalysts showed to be obviously superior to the traditional Al2O3 or TiO2based catalysts with respect to the resistance to the poisoning of oxygen. The presence SO2 would cause the reversible poison. The reversible deactivation of catalyst may be related to the competitive adsorption between SO2 and COS on the catalyst surface.

研究了O_2和SO_2对氧硫化镧和氧硫化钕催化剂上COS水解反应的影响.结果表明,当φ(O_2)<2.0%时,稀土氧硫化物显示出了良好的抗氧性能,而且温度增加有利于提高催化剂的抗氧能力.一定量的SO_2会导致催化剂活性的降低,但这种失活是可逆的,可能是由于SO_2和COS在催化剂表面的竞争吸附所致.

The hydrolysis of carbonyl sulfide was studied over a novel type of rare earth oxysulfides catalyst. The order of catalytic activity of the rare earth oxysulfides was in the sequence: La≈Pr≈ Nd≈ Sm>Eu>Ce>Gd≈Ho>Dy>Er. The analysis of XRD reveals that the catalytic activity could be well related to the easiness of the sulfidation from their oxides to the corresponding oxysulfides and the rare earth oxysulfide is the active phase for the hydrolysis of COS. The effect of the presence of O 2 or SO 2 in the feed...

The hydrolysis of carbonyl sulfide was studied over a novel type of rare earth oxysulfides catalyst. The order of catalytic activity of the rare earth oxysulfides was in the sequence: La≈Pr≈ Nd≈ Sm>Eu>Ce>Gd≈Ho>Dy>Er. The analysis of XRD reveals that the catalytic activity could be well related to the easiness of the sulfidation from their oxides to the corresponding oxysulfides and the rare earth oxysulfide is the active phase for the hydrolysis of COS. The effect of the presence of O 2 or SO 2 in the feed was investigated over La 2O 2S and Nd 2O 2S, respectively. At the O 2 volume fraction below 1.5% there was not any effect on the COS conversion and at 2% a COS conversion of higher than 90% was obtained at temperature over 150 ℃. The catalytic activity of COS hydrolysis decreased in the presence of SO 2 at a temperature below 300 ℃. The poisoning effect of SO 2 was reversible and may be caused by the competitive adsorption between SO 2 and COS on the surface of rare earth oxysulfides.

研究了一种新型的羰基硫水解催化剂——稀土氧硫化物 .考察了稀土系列氧化物硫化后的水解活性 ,发现其活性顺序为 La≈ Pr≈ Nd≈ Sm >Eu>Ce>Gd≈ Ho>Dy>Er. XRD物相分析表明 ,各种稀土氧化物经水合及硫化后呈现出不同的物相变化特性 ,稀土氧硫化物是 COS水解的活性物质 .在氧硫化镧和氧硫化钕催化剂上研究了 O2 和 SO2 对羰基硫水解反应的影响 ,与传统的氧化铝基和氧化钛基水解催化剂相比 ,稀土氧硫化物显示出良好的抗氧化性能 ,而 SO2 对催化活性的影响是可逆的 .

 
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