CAJ | 학술논문

以传统固相烧结法制备的不稳定的层状 K2Ti2O5为前驱体，直接将钛酸钾晶须进行离子交换得到具有纳微复合结构的TiO2载体，等体积浸渍法制备出MoO3/TiO2催化剂，运用SEM、XRD、BET、TEM等技术手段对载体和催化剂进行表征，并考察了该TiO2复合结构负载催化剂的加氢脱硫催化活性。SEM和XRD分析显示：该纳微米复合结构是由纳米颗粒与微米晶须构成的特殊结构，拥有不同形貌和尺寸的TiO2却具有相同的锐钛矿相。与单独TiO2纳米粒子和TiO2晶须相比，TiO2复合结构负载催化剂表现出更佳的脱硫催化能力，在温度310℃、压力2.1 MPa、体积空速6 h?1、氢/油体积比600条件下，催化剂表现出优异的DBT脱硫性能。
이전통고상소결법제비적불은정적층상 K2Ti2O5위전구체，직접장태산갑정수진행리자교환득도구유납미복합결구적TiO2재체，등체적침지법제비출MoO3/TiO2최화제，운용SEM、XRD、BET、TEM등기술수단대재체화최화제진행표정，병고찰료해TiO2복합결구부재최화제적가경탈류최화활성。SEM화XRD분석현시：해납미미복합결구시유납미과립여미미정수구성적특수결구，옹유불동형모화척촌적TiO2각구유상동적예태광상。여단독TiO2납미입자화TiO2정수상비，TiO2복합결구부재최화제표현출경가적탈류최화능력，재온도310℃、압력2.1 MPa、체적공속6 h?1、경/유체적비600조건하，최화제표현출우이적DBT탈류성능。
With unstable layered K2Ti2O5 as the precursor in the traditional preparation of solid phase sintering, nano/micro-composite TiO2 (TiO2-m) derived from K2Ti2O5 was synthesized via ion-exchange. Supported MoO3/TiO2-m catalysts were prepared by incipient impregnation. Simultaneously, the properties of supports and catalysts were characterized by means of SEM, XRD, BET and TEM. An investigation into the HDS performance of MoO3/TiO2-m catalysts for dibenzothiophene was performed. SEM and XRD results showed that the prepared TiO2-m supports were shaped in nano-scale particle and micron-sized whisker morphology, having the same anatase phase with different morphologies and sizes of TiO2. Compared with pure morphology control sample, HDS tests indicated that Mo catalysts supported on TiO2-m showed the best HDS catalytic activity under relatively mild reaction conditions (310℃, 2.1 MPa, LHSV 6 h?1 and H2/feed ratio 600 m3·m?3 ).