(381ac) Synthesis of Amine-Functionalized Zeolite for Carbon Dioxide Separation

With the growing concern about
global warming placing greater demands on improving energy efficiency and
reducing CO₂ emissions, the need for improving the energy intensive,
separation processes involving CO₂ is well recognized. The US
Department of Energy estimates that the separation of CO₂ represents
75% of the cost associated with its separation, storage, transport, and
sequestration operations. Hence, energy efficient, CO₂ separation
technologies with improved economics are needed for industrial processing and
for future options to capture and concentrate CO₂ for reuse or
sequestration. The overall goal of this research is to faster the development
of zeolite adsorbent with amine functionalized to improve manufacturing
efficiency and reduce CO₂ emissions. This research focuses on the
power, petrochemical, and other CO₂ emitting industries, and
provides a detailed review of the current commercial CO₂ separation
technology, i.e. adsorption, an overview of the emerging adsorption technology
for CO₂ separation, and both near and long term recommendations for
future research on adsorption. Our research work aims at the synthesis of Y-zeolite
and commercially available of Y60 zeolite with a modification by piperazine to
study their characterizations and adsorption/desorption properties of carbon
dioxide from gas streams. Further, the synthesis was carried out by
hydrothermal method for large internal and external surface area with uniform
particle size. By researching the characterization of Y-zeolite and amine
functionalized Y-zeolite through X-ray diffraction pattern and Fourier
Transform Infrared Spectrum. The diffraction peaks located at 2θ were
clearly observed for both samples indicating evidence of a well ordered
structure. The IR spectrum for both Y zeolite and amine functionalized zeolite
shows significant bands which was related to O-H, H-O-H, and Si-O-Si stretching
vibrations. The IR spectrum exhibit bands to C-H₂, N-H₂,
N-H, and -NH₃⁺O-Si/-NH₂⁺O-Si vibrations
after the piperazine modification confirmed that piperazine has been grafted on
Y-zeolite. Our research reflects that the both amine functionalized Y and Y60
zeolite can be potentially shows a promising and cost-effective adsorbents with
high CO₂ adsorption capacity (<4.27mmol of CO₂ /g of
sorbent) for the application in carbon dioxide separation for natural gas
purification.