氧化铝酸性质的调变规律研究  

Study on Regulation of Acid Properties of Alumina

作　　者：陈华[1] 彭家琴 CHEN Hua;PENG Jia-qin(Chongqing University of Science and Technology,Chongqing 401331,China)

机构地区：[1]重庆科技学院,重庆401331

出　　处：《广州化工》2022年第11期49-50,66,共3页GuangZhou Chemical Industry

基　　金：重庆市教育委员会科学技术研究项目(No:KJQN201801526)。

摘　　要：催化剂是甲醇制烯烃工艺发展瓶颈,催化剂成型过程至关重要。氧化铝粘结剂中的L酸利于积碳反应和甲烷等副产物生成。故本文对活性氧化铝酸性质调变规律进行研究。研究结果表明,单一非金属元素的加入(F、B、Si)能与氧化铝中的不饱和键或羟基结合从而增加氧化铝表面B酸性位。F、Si共同作用对γ-Al_(2)O_(3)表面酸性质调变效果最为显著。(NH_(4))_(2)SiF_(6)含量为12%时B酸位最大,L酸量最低,反应产物中甲烷生成受到明显抑制,丙烯收率提高。Catalyst is the bottleneck of methanol to olefin process.The shaping process of catalyst from the above zeolite is very important.The L acid in Al_(2)O_(3) is beneficial to the carbon deposition reaction and the formation of by-products such as methane.Therefore,the regulation of the acid properties of γ-Al_(2)O_(3) was studied.The addition of a single non-metallic element(F,B,Si)can combine with the unsaturated bond or hydroxyl group in the alumina to increase the acidic sites of B on the alumina surface.The combined effect of F and Si had the most significant effect on the surface acid properties ofγ-Al_(2)O_(3).When the content of (NH_(4))_(2)SiF_(6) was 12%,B acid site was the largest.The methane production in the reaction product was significantly inhibited,and the propylene yield increased.

关 键 词：MTP工艺 酸性质 改性 γ-Al_(2)O_(3) 

分 类 号：G642.0[文化科学—高等教育学]