Enhancement of CNTs Supported Cobalt Nanocatalyst Activity, Selectivity and Stability in Fischer-Tropsch Synthesis by Functionalization of Support with Ozone and Hydrogen Peroxide
Author(s):
Abstract:
Functionalization of carbon nanotubes (CNTs) was applied, during preparation of FischerTropsch synthesis (FTS) cobalt nanocatalysts, to modify the surface properties of CNTs supports. Carbon nanotubes functionalization effects on the particle size, dispersion, activity and selectivity of Co/CNTs nanocatalyst in FTS werw investigated. CNTs were functionalized with ozone and hydrogen peroxide. 15 wt.% Cobalt was impregnated on the functionalized and un-functionalized supports. Catalyst samples were characterized by different methods and assessed in a fixed bed micro reactor. Optimal catalyst activity is usually dependent on the size of the active metal phase, so the catalyst metal particles on the support with finer particles showed higher activity due to higher distribution, than the catalyst with larger size and poor dispersion. This phenomenon is the consequence of the existence of more metal particles which are more accessible to the reactants. In this work, the presence of functional groups decreased the active metal particle size to 8.8 nm. Furthermore, functionalization increased the percentage conversion of carbon monoxide by a factor of 1.16%. In addition, rate of catalyst deactivation decreased by 46% during 20 days continues synthesis. Finally, synthesis products showed a slight shift to lighter hydrocarbons.
Keywords:
Language:
Persian
Published:
Petroleum Research, Volume:26 Issue: 88, 2016
Page:
93
magiran.com/p1628314
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!