Study on the Acid Strength and Distribution of Solid Phosphoric Acid Catalyst 固体磷酸催化剂的酸强度及其分布研究
The relations between the structure and the acid strength of inorganic oxyacid of non-metal elements 非金属元素无机含氧酸的结构和酸强度的关系
Correlation of the Support Acid Strength Distribution of Sulfide Catalysts with Their Reactivity for Methanol Synthesis 硫化物催化剂体系载体酸强度分布及其与反应性能的关联
The selectivity is related to the porous structure and acid strength of the catalyst. 选择性与催化剂的结构和酸强度有关;
The Determination of the Acid Strength and its Distribution in Solid Catalyst by Hammett Indicator 用Hammett指示剂法测定固体催化剂的酸强度及其分布
For all fluorinated adsorbents, the specific surface area decreases, while the pore radius, acidity and acid strength increase, in comparison with the original samples. 与未氟化样品比较,所有氟化吸附剂的比表面均降低,而平均孔半径、酸度和酸强度增加;
It is found that Mn and La ion modification could decrease the total amount of acid sites and weaken the acid strength. 沸石经La、Mn、Co离子交换和水蒸气处理改性,可以改变其酸性:交换La降低Hβ总酸中心量,主要是强酸中心量减少和强度减弱;
It directly influences the distribution of acid strength. 它直接影响催化剂的酸强度分布。
Study of Effective Acid Strength of Acetic Esterification Catalyst 乙酸酯化反应催化剂有效酸强度的研究
The chlorination efficiency increased as the organic acid strength increased. 提高有机酸强度可增加次氯酸叔丁酯对BR的氯化效率;
Compared with the surface acidic property of modified zeolite determined by NH_3-TPD and IR, the effect of effective pore size of zeolite on the selectivity of light olefins in MeOH conversion reaction is less than the effect of surface Bronsted acidic amount and acid strength of zeolite. 与用NH3-TPD及IR所测得的改性沸石表面酸性质相比,沸石的有效孔径的因素对甲醇转化反应中低碳烯烃选择性的影响小于沸石表面B酸量和酸强度的因素。
The results show that the supported heteropoly acids still remain their keggin structure but the acid strength have been improved. 负载后HPA的酸强度得到了提高,其Keggin结构仍然保持。
Acid Strength and the Framework Structure of Zeolite 沸石的骨架结构与酸强度
An Improved Calculation for the Acid Strength of Covalent Hydride 对共价氢化物酸强度计算公式的改进
The surface acidity and acid strength distribution, the phase structure, the surface composition, and the calcination procedure of the catalysts were analyzed and characterized by Hammett indicator, Py-TPD 、 XRD 、 EDX 、 SEM 、 DTA/ TG 、 FT-IR and LRS. 利用Hammett指示剂、吸附吡啶的TPD、XRD、EDX、SEM、DTA/TG、FT&IR、LRS等技术对催化剂酸性及酸强度分布、物相结构、表面组成、催化剂的焙烧过程等进行了分析表征。
The results showed that as a supporter Al 2O 3 could obviously retard the decomposition of Zr ( SO 4) 2, crystal phase transform of ZrO 2 and considerably increase the acid content and acid strength of the catalysts. 在Al2O3上明显地延缓了Zr(SO4)2的分解和ZrO2的晶相转变.并且使酸量和酸强度有所提高。
The results show that the modification of H β zeolite by phosphorus suppresses acid strength and also significantly decreases the total amount of acid and the content of n-propylbenzene, and therefore the alkylation selectivity is increased; 结果表明:磷使强酸受到抑制,正丙苯的含量较Hβ分子筛有显著下降,多异丙苯生成量有所降低,从而提高了Hβ催化剂的选择性;
Relationships of acid strength of catalyst and its distribution on catalyst with stability of catalyst and product distribution in methanol conversion were discussed. 结合催化剂的表征与评价结果,探讨了催化剂酸强度及其分布与催化剂稳定性和甲醇转化产物分布的关系。
Effect of the Lewis Acid Strength of Doping Elements on Electronic Properties of Doped In_2O_3 掺杂元素的Lewis酸强度对掺杂In2O3电性质的影响
Based on the recent trends, research advances of sulfonic acid resin, zeolite, heteropolyacid is reviewed, and the effect of zeolites structure, acid density, acid strength on etherification property is discussed in this paper. 针对近期的发展动态,着重综述了大孔磺酸型离子交换树脂、分子筛、杂多酸等新型醚化催化剂的研究进展,详细讨论了分子筛催化剂的结构、酸密度、酸强度对醚化性能的影响。
Since Dy can not only adjust the acid strength distribution, but also decrease the carbon deposition of the catalyst and restrain the loss of SO 4 2-by forming mosaic structure, the stability of the catalyst can be improved effectively. 镝对催化剂ZDSH的酸强度和酸量具有较大的调变作用,且能降低催化剂表面的积炭量,并且能通过形成镶嵌式结构抑制SO42-的流失,显著提高催化剂ZDSH的稳定性。
The acid strength of such acid is higher than common acid. 其酸强度比普通酸(如100%硫酸)强。
The surface acid strength and its distribution were characterized by Hammett indicator and Py TPD. 采用Hammett指示剂法、吸附吡啶的TPD法,考察催化剂ZDSH的酸强度及其分布;
Acetonitrile was utilized as an IR molecular probe to determine the acid type ( Brnsted or Lewis acid) and Lewis acid strength of the ionic liquids. 采用乙腈探针红外光谱法测定了离子液体的酸类型(Br¨onsted/Lewis酸),并指示了离子液体的Lewis酸强度。
The influence of acid strength of the ionic liquids, reaction temperature, reaction time, and CO pressure was studied. 研究了离子液体的酸强度、反应温度、反应时间和CO压力等对反应活性的影响。
The influence of acid strength and pore confinement effect on Beckmann rearrangement reaction has been systematically studied by DFT calculations. 本文中利用理论计算的方法系统地研究了固体酸的酸强度以及分子筛的孔道限域效应对贝克曼重排反应机理以及活性的影响。
NH3-TPD show that the characterization of the acid strength of catalyst with the incorporation of Ga decreased. NH3-TPD表征催化剂的酸强度随着Ga的掺入有所降低。
Characterization of catalyst structure, the catalyst could removal thiophene in the coking benzene because of catalyst surface area and acid strength increase. 通过对催化剂结构的表征,表明催化剂比表面积和酸强度的增加是其能在焦化苯中脱除噻吩的原因。