Adding a catalyst can ___ the rate of a chemical reaction. A. raise B. lower C. double D. affect 相关知识点: 试题来源: 解析 D。本题考查词汇及对催化剂作用的理解。raise 通常用于“提升,提高(数量、水平等)”。lower 表示“降低”,催化剂不是单纯地提高或降低反应速率。double 意思是“加倍”...
This difference in reactivities allows the reaction mixture to be formed and manipulated at the first temperature until polymerization is desired. When appropriate, the reaction mixture is heated to a suitable temperature (preferably greater than 50掳 C.) to activate the catalyst and to initiate ...
The preparative scale kinetic resolution of amine 1 was performed by adding 0.200 g CALB catalyst to a mixture 1 (0.484 g, 4 mmol) and 4-pentenoic acid (300 mg, 3 mmol)in [bdmim]tfms ionic liquid (2 mL) and kept under stirring at 40 ◦C and 5mmHg for 72 h. The reaction ...
aOngoing Projects 持续的项目 [translate] aA low molecular oligoglycerol moiety can be produced by heating glycerol at 200 uC under vacuum with potassium hydroxide as a catalyst. Carbon dioxide should be bubbled through the reaction vessel to prevent oxidation 低分子oligoglycerol份额可以通过加热丙三醇...
摘要: It is found that the addition of Co into MoO3/Al2O3 catalyst can improve the catalytic activity. Mo-Co/Al catalyst exhibits higher activity than Co-Mo/Al in methanation reaction.关键词: promoter cobalt molybdenum impregnation sequence sulfur-resistant methanation synthetic natural gas DOI:...
3)What effects, if any, will adding a catalyst has on the position of equilibrium? answer choices : A)shifts to product side B) shifts to reactant side C) will increase the concentration of [Co(H2O)6]2+ Show transcribed image text ...
HZSM-5 with varying Si/Al2 ratios were modified with Mn and alkaline treatment and tested as FCC catalyst additives to enhance the yield of ligh... O.,Awayssa,N.,... - 《Applied Catalysis A General》 被引量: 13发表: 2014年 Study of the anisotropic dielectric behavior of Rb_ ...
Dang, Effect of hydrothermal time on catalyst activity of counter electrode Cu2S-rGO composite to enhance the efficiency of quantum dot solar cells. Ceram. Int. 50, 27127 (2024). Google Scholar T. Zhang, H. Yu, D. Cui, L. Xu, and F. Li, constructing a stable and high-performance ...
composition comprising a reaction product of a polyamine and a Michael addition receptor reacted in the presence of a catalyst comprising a phenolic compound, with the proviso that the phenolic compound is not a phenol which is substituted with tert-butyl groups in both ortho positions to the ...
1. A process for preparation of high solid polyester polyol/silica nanocomposite resin with low viscosity, comprising mixing an alcoholic monomer, a diacid monomer and a colloidal silica alcosol, evaporating the solvent from said colloidal silica alcosol by distillation, adding a catalyst, and then...