عنوان انگلیسی: PtSnNa@SUZ-4-catalyzed propane dehydrogenation
سال نشر: ۲۰۱۶
نویسنده: Hualan Zhou,Jingjing Gong,Bolian Xu,Lei Yu,Yining Fan
تعداد صفحه فارسی: ۱۵ – تعداد صفحه انگلیسی: ۶
دانشگاه: Nanjing University, Nanjing, 210093, China, China b Jiangsu Key Laboratory of Environmental Material and Environmental Engineering, School of Chemistry and Chemical Engineering, Yangzhou University,
نشریه: Process Safety and Environmental Protection
کیفیت ترجمه: ترجمه پلاس
چکیده
Pt-Sn بر پایه-۴- SUZهای کاتالیزور با محتوی یونی سدیم مختلف از طریق روش اشباع مداوم تهیه میشوند. خواص کاتالیزوری و ساختاری کاتالیزورها با روشهای مختلف ترکیبی با تست میکرو-راکتور بررسیشده است. نتایج آزمایشگاهی نشان میدهند که کاتالیزور PtSnNa/SUZ-4 ماندگاری ، جذب پروپیلن و پایداری بالایی با محتوی یون سدیم مناسب نشان میدهد. افزایش یون سدیم محیطهای اسیدی قوی را خنثی میکند و مانع تشکیل زغال (کک) میشود. بااینحال، وجود بیشازحد یون سدیم تنها نمونه قلع را به قلع فلزی کاهش میدهد، که فعالیت کاتالیزور را با شکلدهی آلیاژ PtSn کم میکند، که این به ذرات بیشتر پلاتین داخل منافذ زئولیت (هر نوع سیلیکات آبدار) منجر میشود، که بهراحتی توسط زغال غیرفعال میشود. مشخص شد که کاتالیزوری با محتوی یون سدیم در ۰.۵-۱.۵ wt% باعث بیشترین تبدیل پروپان و جذب پروپیلن میشود.
Abstract
SUZ-4-based Pt-Sn catalysts with different sodium ion contents were prepared through sequential
impregnation method. The structural and catalytic properties of the catalysts were studied by using various techniques combined with micro-reactor tests. The experimental results showed that PtSnNa/SUZ-4
catalysts exhibited high durability, high propylene selectivity and high stability with adequate sodium
ion content. Sodium ion additives neutralized the strong acid sites and prevented the formation of coke.
However, excess sodium ion not only reduced tin species to metallic tin, which reduced the catalyst
activity by forming PtSn alloys, but also led to more Pt particles inside the pore of zeolite, which were
easily deactivated by coke. It was found that catalysts with the sodium ion content at 0.5–۱.۵wt % led to
the highest propane conversion and propylene selectivity
impregnation method. The structural and catalytic properties of the catalysts were studied by using various techniques combined with micro-reactor tests. The experimental results showed that PtSnNa/SUZ-4
catalysts exhibited high durability, high propylene selectivity and high stability with adequate sodium
ion content. Sodium ion additives neutralized the strong acid sites and prevented the formation of coke.
However, excess sodium ion not only reduced tin species to metallic tin, which reduced the catalyst
activity by forming PtSn alloys, but also led to more Pt particles inside the pore of zeolite, which were
easily deactivated by coke. It was found that catalysts with the sodium ion content at 0.5–۱.۵wt % led to
the highest propane conversion and propylene selectivity
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