Preparation of stable tetraethylenepentamine-modified ordered mesoporous silica sorbents by recycling natural Equisetum ramosissimum

Shou-Heng Liu, Chi Hong Kuok

Research output: Contribution to journalArticle

Abstract

It is well-known that global warming of the earth is caused by the progressive increase of CO2 concentration in the environment due to the huge utilization of fossil fuels. As a result, the development of an efficient and economic method to capture CO2 from large stationary sources, such as coal-fired power plants, cement and steel factories, and so on is urgent. In this study, ordered mesoporous silicas (E-SBA-15) have been prepared by using Equisetum ramosissimum plants as the silica sources and their subsequently incorporating with amino-containing compounds (tetraethylenepentamine, TEPA) and stabilizers (titanium isopropoxide, TIP). A variety of different spectroscopic and analytical techniques, such as nitrogen adsorption-desorption isotherms, low-angle X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transformed infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA) are used to characterize the physicochemical properties of various materials. CO2 adsorption capacities of prepared sorbents at 75 °C are obtained by TGA at atmospheric pressure. Among all sorbents, TEPA impregnated E-SBA-15 sorbents possess the highest CO2 sorption capacity (1.60 mmol CO2 g−1sorbent) under ambient pressure using dry 15% CO2. However, TEPA/TIP incorporated E-SBA-15 sorbents exhibit enhanced durability during repeated sorption-desorption cycles compared to the above-mentioned sorbents. This significant enhancement in the stability of CO2 sorption-desorption process is most likely due to the decreased decomposition/leaching of TEPA which is restricted via the steric effect of TIP. These synthesized sorbents from inexpensive resources (agricultural waste) exhibit good sorbent capacity and surpassing regenerability, revealing a promising CO2 sorbent for the cost-effective applications in a cyclic adsorption process.

Original languageEnglish
Pages (from-to)566-572
Number of pages7
JournalChemosphere
Volume191
DOIs
Publication statusPublished - 2018 Jan 1

Fingerprint

Equisetum
Recycling
Sorbents
Silicon Dioxide
titanium
desorption
recycling
sorption
silica
Silica
Adsorption
adsorption
coal-fired power plant
physicochemical property
Fossil Fuels
Power Plants
Global Warming
durability
infrared spectroscopy
Sorption

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

@article{f99de929b573427d93aea460e638bf4c,
title = "Preparation of stable tetraethylenepentamine-modified ordered mesoporous silica sorbents by recycling natural Equisetum ramosissimum",
abstract = "It is well-known that global warming of the earth is caused by the progressive increase of CO2 concentration in the environment due to the huge utilization of fossil fuels. As a result, the development of an efficient and economic method to capture CO2 from large stationary sources, such as coal-fired power plants, cement and steel factories, and so on is urgent. In this study, ordered mesoporous silicas (E-SBA-15) have been prepared by using Equisetum ramosissimum plants as the silica sources and their subsequently incorporating with amino-containing compounds (tetraethylenepentamine, TEPA) and stabilizers (titanium isopropoxide, TIP). A variety of different spectroscopic and analytical techniques, such as nitrogen adsorption-desorption isotherms, low-angle X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transformed infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA) are used to characterize the physicochemical properties of various materials. CO2 adsorption capacities of prepared sorbents at 75 °C are obtained by TGA at atmospheric pressure. Among all sorbents, TEPA impregnated E-SBA-15 sorbents possess the highest CO2 sorption capacity (1.60 mmol CO2 g−1sorbent) under ambient pressure using dry 15{\%} CO2. However, TEPA/TIP incorporated E-SBA-15 sorbents exhibit enhanced durability during repeated sorption-desorption cycles compared to the above-mentioned sorbents. This significant enhancement in the stability of CO2 sorption-desorption process is most likely due to the decreased decomposition/leaching of TEPA which is restricted via the steric effect of TIP. These synthesized sorbents from inexpensive resources (agricultural waste) exhibit good sorbent capacity and surpassing regenerability, revealing a promising CO2 sorbent for the cost-effective applications in a cyclic adsorption process.",
author = "Shou-Heng Liu and Kuok, {Chi Hong}",
year = "2018",
month = "1",
day = "1",
doi = "10.1016/j.chemosphere.2017.10.088",
language = "English",
volume = "191",
pages = "566--572",
journal = "Chemosphere",
issn = "0045-6535",
publisher = "Elsevier Limited",

}

Preparation of stable tetraethylenepentamine-modified ordered mesoporous silica sorbents by recycling natural Equisetum ramosissimum. / Liu, Shou-Heng; Kuok, Chi Hong.

In: Chemosphere, Vol. 191, 01.01.2018, p. 566-572.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Preparation of stable tetraethylenepentamine-modified ordered mesoporous silica sorbents by recycling natural Equisetum ramosissimum

AU - Liu, Shou-Heng

AU - Kuok, Chi Hong

PY - 2018/1/1

Y1 - 2018/1/1

N2 - It is well-known that global warming of the earth is caused by the progressive increase of CO2 concentration in the environment due to the huge utilization of fossil fuels. As a result, the development of an efficient and economic method to capture CO2 from large stationary sources, such as coal-fired power plants, cement and steel factories, and so on is urgent. In this study, ordered mesoporous silicas (E-SBA-15) have been prepared by using Equisetum ramosissimum plants as the silica sources and their subsequently incorporating with amino-containing compounds (tetraethylenepentamine, TEPA) and stabilizers (titanium isopropoxide, TIP). A variety of different spectroscopic and analytical techniques, such as nitrogen adsorption-desorption isotherms, low-angle X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transformed infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA) are used to characterize the physicochemical properties of various materials. CO2 adsorption capacities of prepared sorbents at 75 °C are obtained by TGA at atmospheric pressure. Among all sorbents, TEPA impregnated E-SBA-15 sorbents possess the highest CO2 sorption capacity (1.60 mmol CO2 g−1sorbent) under ambient pressure using dry 15% CO2. However, TEPA/TIP incorporated E-SBA-15 sorbents exhibit enhanced durability during repeated sorption-desorption cycles compared to the above-mentioned sorbents. This significant enhancement in the stability of CO2 sorption-desorption process is most likely due to the decreased decomposition/leaching of TEPA which is restricted via the steric effect of TIP. These synthesized sorbents from inexpensive resources (agricultural waste) exhibit good sorbent capacity and surpassing regenerability, revealing a promising CO2 sorbent for the cost-effective applications in a cyclic adsorption process.

AB - It is well-known that global warming of the earth is caused by the progressive increase of CO2 concentration in the environment due to the huge utilization of fossil fuels. As a result, the development of an efficient and economic method to capture CO2 from large stationary sources, such as coal-fired power plants, cement and steel factories, and so on is urgent. In this study, ordered mesoporous silicas (E-SBA-15) have been prepared by using Equisetum ramosissimum plants as the silica sources and their subsequently incorporating with amino-containing compounds (tetraethylenepentamine, TEPA) and stabilizers (titanium isopropoxide, TIP). A variety of different spectroscopic and analytical techniques, such as nitrogen adsorption-desorption isotherms, low-angle X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transformed infrared (FTIR) spectroscopy, and thermogravimetric analysis (TGA) are used to characterize the physicochemical properties of various materials. CO2 adsorption capacities of prepared sorbents at 75 °C are obtained by TGA at atmospheric pressure. Among all sorbents, TEPA impregnated E-SBA-15 sorbents possess the highest CO2 sorption capacity (1.60 mmol CO2 g−1sorbent) under ambient pressure using dry 15% CO2. However, TEPA/TIP incorporated E-SBA-15 sorbents exhibit enhanced durability during repeated sorption-desorption cycles compared to the above-mentioned sorbents. This significant enhancement in the stability of CO2 sorption-desorption process is most likely due to the decreased decomposition/leaching of TEPA which is restricted via the steric effect of TIP. These synthesized sorbents from inexpensive resources (agricultural waste) exhibit good sorbent capacity and surpassing regenerability, revealing a promising CO2 sorbent for the cost-effective applications in a cyclic adsorption process.

UR - http://www.scopus.com/inward/record.url?scp=85032874087&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85032874087&partnerID=8YFLogxK

U2 - 10.1016/j.chemosphere.2017.10.088

DO - 10.1016/j.chemosphere.2017.10.088

M3 - Article

VL - 191

SP - 566

EP - 572

JO - Chemosphere

JF - Chemosphere

SN - 0045-6535

ER -