Adsorption methodology: Synthesis of Nanostructured nitrogen-doped porous carbon adsorbents for perchloroethylene vapor adsorption
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
View: 58
This Paper With 10 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_AMECJ-3-4_002
تاریخ نمایه سازی: 14 آذر 1402
Abstract:
The perchloroethylene (PCE, tetrachloroethylene), as a representative
of chlorinated ethylenes and volatile organic compounds (VOCs), can
be easily transported and remain in the atmosphere due to its volatility
and stability properties. As a result, there is a crucial need to reduce
this pollution to the extent permitted by international standards.
The concentration of PCE determined with Gas chromatography–
mass spectrometry analyzer (GC-MS). Activated nanocarbons
(ACs) doped with nitrogen functional groups were prepared using
the walnut shell as a precursor to evaluate their adsorption capacity
for PCE vapors. Several techniques, including scanning electron
microscopy (SEM), N۲ adsorption-desorption, and the Fourier
transforms infrared spectrometry (FTIR), were applied to characterize
the physical-chemical properties of the ACs. It is found that the
PCE adsorption considerably increased on the nitrogen-doped ACs
(KNCWS) due to their structural and surface charge properties. By
conducting kinetic study, the pseudo-first-order model matched well
with experimental data that could indicate reversible adsorption of
the PCE on heteroatom doped ACs. The sips model agreed well with
the equilibrium adsorption of PCE on the nitrogen-doped ACs, and
the maximum adsorption capacities for PCE reached ۱۶۶, ۲۸۵, and ۹۵
mg/g for KNCWS-۱۱, KNCWS-۲۱, and KNCWS-۳۱, respectively.
Also, the concentration of PCE were online measured based on
nitrogen-doped ACs as solid-phase extraction (SPE) by the GC-MS
as analytical procedure. Therefore, the nitrogen-doped ACs was good
choices for the removal of PCE vapors.
Keywords:
Perchloroethylene , Adsorption procedure , Gas chromatography mass spectrometry , Porous Nano carbon , Nitrogen-doped adsorbent
Authors
Mohammad Ghasemi Kahangi
Chemical Engineering Department, Islamic Azad University, North Tehran Branch, Tehran, Iran- Carbon and Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran
Alimorad Rashidi
Carbon and Nanotechnology Research Center, Research Institute of Petroleum Industry, Tehran, Iran
Mohammad Samipoorgiri
Chemical Engineering Department, Islamic Azad University, North Tehran Branch, Tehran, Iran