查询词典 catalyst

Comparing granular NiP/Al_2O_3 catalyst with pellet NiP/Al_2O_3 catalyst, SEM , XPS and the catalytic activity gave the evidences that the NiP alloy broke off from the support which mainly leads to the deactivation of the pulverous catalyst.

通过对粉末和球形颗粒催化剂反应前后的SEM 和XPS 及催化剂活性对比分析，证明了粉末状非晶态NiP/Al_2O_3 催化剂失活原因主要是活性组分集团NiP的脱落。

Finally, the article discussed the possible mechanism of multi-phase electrochemical degradation of wastewater through the XPS spectrum of the used catalysts surface: In the acid solutions, the electro-generated O_2 may get electrons on the porous graphite cathode and then form H_2O_2, H_2O_2 may diffused to the surface of catalyst and reacted with its active part to produce OH, which in turn can destruct organics. The catalyst functioned as both the catalyst to decompose H_2O_2 and the flocculants to sedimentate the degraded waste.

最后全文结合研究反应后催化剂表面的XPS光电子能谱推断了该体系降解污废水可能的反应机理：在酸性条件下，石墨双阳极产生的O_2被多孔扩散性石墨阴极还原成H_2O_2，并通过扩散传质作用在催化剂的表面活性中心分解为强氧化性中间产物·OH，强氧化性攻击有机物，使其降解为小分子有机物或CO_2和H_2O，催化剂在体系中即起催化作用也起吸附、絮凝作用。

A method for producing fatty acid alkyl esters and/or glycerin comprising a step of bringing a fat or oil into contact with an alcohol in the presence of a catalyst, wherein the catalyst is at least one catalyst selected from the group consisting of the following to: a metal oxide having an ilmenite structure and/or a slyrankite structure; an oxide containing a metallic element belonging to the Group 12 and a metallic element belonging to the Group 4; a mixed oxide containing a metallic element belonging to the Group 12 and a tetravalent transition metallic element; a metal oxide containing zirconium and at least one metallic element selected from the group consisting of metallic elements belonging to the Groups 4, 5 and 8; and a metal oxide containing anatase type titanium oxide and/or rutile type titanium oxide, and the metal oxide containing a sulfur component of 700 ppm or less.

脂肪酸烷基酯和/或甘油的制造方法包括在催化剂的存在下使脂肪或油与醇接触的步骤，其中，所述催化剂是选自由下列～所组成的组中的至少一种催化剂：具有钛铁矿结构和/或斯里兰卡石结构的金属氧化物；含有属于第12族的金属元素和属于第4族的金属元素的氧化物；含有属于第12族的金属元素和四价过渡金属元素的混合氧化物；含有锆和选自由属于第4、5和8族的金属元素所组成的组中的至少一种金属元素的金属氧化物；和含有锐钛矿型氧化钛和/或金红石型氧化钛的金属氧化物，并且所述金属氧化物含有的硫成分为700ppm以下。

39Mt/a continuous catalytic reforming unit during the 2006~2007 period,such as the clogging in the tremie pipe of the catalyst collector,the difficulty in lifting regenerated catalyst and catalyst runoff in the regenerator and the reactor.

39Mt/a 连续重整装置2006～2007年出现的催化剂收集器下料管堵塞、再生催化剂提升困难、再生器和反应器催化剂跑剂等一系列问题，分析了产生这些异常情况的原因以及采取的对策。

This article examines a series of problems arising in Yangzi Petrochemical Company′s 1.39Mt/a continuous catalytic reforming unit during the 2006~2007 period,such as the clogging in the tremie pipe of the catalyst collector,the difficulty in lifting regenerated catalyst and catalyst runoff in the regenerator and the reactor.It analyzes the causes for these abnormities and recommends countermeasures.

摘要介绍了扬子石化公司1.39Mt/a连续重整装置2006～2007年出现的催化剂收集器下料管堵塞、再生催化剂提升困难、再生器和反应器催化剂跑剂等一系列问题，分析了产生这些异常情况的原因以及采取的对策。

The invention uses low cost grease which are mainly waste resources such as the unedible Jatropha curcas seed oil, the waster oil in the restaurant industry and the acid value oil, etc. as raw materials, thereby enlarging the material sources; because the Rhizopus chinensis CCTCC M201021 full cell lipase which is extremely low in cost is used as the catalyst, the problem of high price catalyst is effectively resolved; the toxic action of the alcohol on the biological catalyst is resolved by the batching fed-batch the short chain alcohol, thereby improving the conversion rate of the short chain alcohol.

本发明以廉价油脂为原料，主要是非可食用性的麻疯籽油以及餐饮业废油、酸价油等废物资源，扩大了原料的来源；采用价格极其低廉的华根霉全细胞脂肪酶作为催化剂，有效地解决了催化剂价格高昂的问题；分批流加短链醇以解决醇对生物催化剂的毒害作用，提高短链醇转化率。

The present dissertation deals with:(1) Exploring the feasibility of the CO〓 methanation and the conversion CH〓/H〓 into C〓 hydrocarbons under plasma with catalyst at ambient temperature and atmosphere.(2) Designing a reactor and preparing some catalysts suited for the conversion of carbon dioxide via the cooperation effect of plasma and catalysts.(3) Optimizing reaction conditions of conversion carbon dioxide to C〓 hydrocarbons in the proposed process.(4) Studying the reaction mechanism of conversion carbon dioxide to C〓 hydrocarbons under plasma by using in situ OES technology.(5) By the results of characterizing coked catalysts, exploring the reasons that result in the coking of catalyst and the paths for decreasing the deposit in the catalyst under plasma.(6) Analyzing the energy efficiency of the plasma catalysis and exploring the paths for improving the energy efficiency.

论文的主要研究工作包括：（1）探索脉冲电晕等离子体与催化剂共同作用CO〓／H〓甲烷化和由CH〓/H〓合成C〓烃反应的可行性；（2）研制等离子体催化CO〓转化的反应器和适配的催化剂；（3）优化等离子体催化CO〓转化制C〓烃反应的工艺条件和电参数；（4）利用原子发射光谱原位技术对等离子体反应的诊断结果，对等离子体催化CO〓转化制C〓烃反应的机理进行推断；（5）通过对积碳催化剂的表征结果，分析积碳的类型及其成因，并探讨减少积碳的途径；（6）通过对等离子体催化CO〓转化制C〓烃反应能量效率的分析，探讨提高等离子体催化反应能量效率的途径。

The influence of CFC-12 content, effect of fluorination temperature and fluorinating time on the structure and hydrodesulfurization activity of the catalysts were examined systematically. The results revealed that hydrodesulfurization activity of the catalyst fluorinated by 1% CFC-12 at 623 K was obviously improved With an increase of 20%-30% as compared With that of the unfluorinated catalyst, the commercially available BY2 catalyst, and NH4F-fluorinated catalysts.

通过对0.5%~7%各种氟里昂浓度和473~773K各种温度及不同时间氟化处理的样品进行详细考察，发现在623K下由含氟里昂1%的湿空气氟化的载体制备的催化剂样品，其噻吩的加氢脱硫的活性有明显改善，相对於非氟化样品、BY-2工业催化剂以及氟化铵溶液浸渍处理的催化剂活性提高20%~30%，且非常稳定。

Ni/ZSM-35 catalyst, as another kind of upgrading catalyst, was used for skeletal isomerizing and hydrogenating olefin in FCC gasoline in the reactor of 100ml catalyst loading.

此外通过添加钼改性ZSM5催化剂，在确保芳构化反应性能的基础上改善了催化剂的脱硫性能，对于硫含量为3070ppm的汽油，脱硫率达到90％。

Since H〓S and SO〓 adsorbed on TiO〓 could react with each other and TiO〓 is the medium of their electron transfer, thus SO〓 could not be adsorbed quite strong on the active site of TiO〓, which makes it more resistant to sulfating and increase the stability of catalyst. Finally, the model and mechanism of the reduction of SO〓 by NH〓 to elemental sulfur is advanced as follows: on the sulfide catalyst, ammonia is decomposed to N〓 and H〓, and H〓 reacts with SO〓 to form the intermedium of H〓S; then H〓S and SO〓 react as Claus reaction on TiO〓 catalyst.

反应系统中过量水蒸气的存在使催化剂表面某些活性位被水蒸气抑制使活性和选择性有较大幅度降低，但这种影响是可逆的，不会造成催化剂永久性中毒；另外当单质硫和水蒸气同时存在时，在〓催化剂上能够生成硫化氢和二氧化硫，而且由于硫化氢和二氧化硫化学吸附能力不同而导致它们的脱附顺序不同，硫化氢的生成温度总是低于二氧化硫的生成温度，说明过量水蒸气的存在会导致氧化物催化剂上逆克劳斯反应的发生；而在硫化物催化剂上几乎没有硫化氢和二氧化硫生成，说明硫化物催化剂能够抑制逆克劳斯反应的发生。

It inculcates justification before God on the ground of human merits.

它说明在上帝灌输在地上人类优点。

TH Leaguer has excellent Quality Control and Management System.

本公司具有完善的品管部门。