بانک مقالات

کاهش برنامه ریزی شده دمایی کاتالیست تغییرشکل بخار نیکل با گلوکز

Temperature-programmed reduction of nickel steam reforming catalyst with glucose

سال انتشار : 2016

تعداد صفحه : 8

کلیدواژه ها: Nickel oxide, Reforming catalyst, Glucose char, Reduction, TGA-FTIR

   دانلود    سفارش ترجمه

ABSTRACT

Temperature-programmed reduction (TPR) of a NiO/-Al2O3 steam reforming catalyst with glucose under a N2 flow was investigated using TGA-FTIR technique. A series of catalyst samples obtained at different temperatures during the TPR were characterised by XRD, CHN elemental analysis, SEM-EDX and TPO. Results showed that the whole TPR covering from room temperature to 900 ◦C consisted of two reactive processes. They were glucose pyrolysis producing carbonaceous materials (char), and NiO reduction by the char resulting in CO2 as a main product. When the initial mass ratio of glucose to the catalyst was 1:10, the catalyst could be completely reduced without carbon remaining. Moreover, two mass loss peaks were observed at around 440 ◦C and 670 ◦C, respectively, during the reduction. Based on the experiments of char characterisation, H2 TPR and excess glucose TPR, a two-stage reduction mechanism was proposed. The first reduction stage was attributed to a solid reaction between NiO and char. The second stage was assigned to NiO being reduced by the CO produced by char gasification with CO2. Their apparent activation energies were 197 ± 19 kJ/mol and 316 ± 17 kJ/mol, respectively, estimated using the Kissinger method.

زبان فایل

مجلات و ژورنال های بین المللی

Elsevier

ترجمه

نوع فایل

رایگان

سال انتشار

2016

دیدگاهها

هیچ دیدگاهی برای این محصول نوشته نشده است.

اولین نفری باشید که دیدگاهی را ارسال می کنید برای “کاهش برنامه ریزی شده دمایی کاتالیست تغییرشکل بخار نیکل با گلوکز”

نشانی ایمیل شما منتشر نخواهد شد. بخش‌های موردنیاز علامت‌گذاری شده‌اند *