Synthesis of amine-modified solid Fe-Zr adsorbents for CO₂adsorption

Abstract

BACKGROUND With the aggravation of the greenhouse effect, much attention is given to the capture of CO2 before its emission into the atmosphere. So far, various solid adsorbents have been developed and used. Among them, solid materials modified with organic‐amines are promising on account of good adsorption and desorption performance. In the present work, triethylenetetramine (TETA) modified solid Fe‐Zr adsorbents were synthesized and characterized. The performance of the adsorbents for CO2 adsorption was tested in a stream of 5% CO2. RESULTS The Fe‐Zr support was first synthesized, and TETA was successfully grafted onto its surface. The adsorbents show good thermal stability and CO2 adsorption ability. Increase in the amount of TETA and increased gas flow rate have a positive influence whereas increase of the adsorption temperature has a negative effect on CO2 adsorption capacity. At 200 mg TETA loading and a flow rate of 20 cm3 g−1, the adsorbent achieves a maximum adsorption capacity of 4.1 mmol g−1 at 75 °C. In addition, the adsorbent exhibits excellent reusability and cyclic performance. CONCLUSION Remarkable adsorption capacity and good recyclability suggest that synthesized TETA‐functionalized Fe‐Zr adsorbents have high potential for CO2 capture in industry. © 2015 Society of Chemical Industry

The synthesis of zirconium and tetraethylenepentamine bi-functionalized TiO2 for efficient CO2 adsorption

“…4(d)). The results are in accordance with the previous work [22], which is attributed to the reaction between Zr atoms coming from TiO 2 (Zr 0.1 ) and N species originating from TEPA. The XPS results provide further evidence for the successfully synthesis of ICP and XPS are used in combination for the detection of elements content.…”

“…Tetraethylenepentamine (TEPA) functionalized TiO 2 (Zr N ) was synthesized by a wet impregnation method [22,25]. Typically, a desired amount of TEPA was dissolved in 10 g of ethanol, and followed by the addition of 0.5 g of as-synthesized TiO 2 (Zr N ).…”

“…Similar to our previous work, CO 2 adsorption experiment was carried out using a Micromeritics AutoChem II 2920 Chemisorption analyzer [22,25]. Typically, a desired amount of adsorbent was exposed to a pure argon flow at 100 °C in order to remove the impurities adsorbed on the surface.…”

“…In CO 2 mitigation technologies, CO 2 adsorption with kinds of solid adsorbents receives a great attention because of the large adsorption capacity and less corrosion to the equipment [6]. For efficient adsorption, various organic amine functionalized adsorbents are developed, such as molecular sieves [7][8][9][10], carbon [11][12][13][14], metalorganic framework (MOFs) materials [15][16][17][18], polymer [19][20][21] and bimetal materials [22].…”

Microwave-assisted synthesis of amine functionalized mesoporous polydivinylbenzene for CO2 adsorption

“…Recently, functional groups like N-donor Lewis base sites such as in organic amines have more tendency to adsorb CO 2 molecules [47]. Amine functionality provides Lewis base sites with lone pair electrons which coordinate favourably with CO 2 molecules [48] with several triazine-based polymeric adsorbents being developed for CO 2 adsorption [49][50][51]. Amine functionalized silicas have been shown to experimentally and theoretically influence the CO 2 adsorption mechanism [52] by the formation of intermolecular ammonium carbamates with primary amines, while being stabilized with secondary amines by forming carbamic acid.…”