Enhanced CO<sub>2</sub> Adsorption Performance on Hierarchical Porous ZSM-5 Zeolite

Liu, Qing; He, Pingping; Qian, Xingchi; Fei, Zhaoyang; Zhang, Zhuxiu; Chen, Xian; Tang, Jihai; Cui, Mifen; Qiao, Xu; Shi, Yao

doi:10.1021/acs.energyfuels.7b02543

Cited by 70 publications

(43 citation statements)

References 55 publications

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“…Microporous ZSM‐5 zeolites that contain mesopores have attracted much attention in adsorption processes because they have exhibited enhanced adsorption performance when mesopores are introduced. A huge variety of research has been devoted to incorporating mesopores.…”

Section: Introductionsupporting

confidence: 92%

Selective Adsorption of p‐Cresol from a Mixture of m‐Cresol and p‐Cresol over ZSM‐5 with Controlled Micro‐ and Mesoporosity

Guo

et al. 2019

ChemistrySelect

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Ammonium hexafluorosilicate (AHFS) 1 at different concentrations was utilized as a mesopore‐generating agent to synthesize hierarchical ZSM‐5 (Si‐ZSM‐5) adsorbents; K+‐exchanged hierarchical ZSM‐5 (K−Si‐ZSM‐5) was successfully prepared by an impregnation method. The properties of adsorbents were characterized using XRD, XRF, N2 adsorption‐desorption and NH3‐TPD. The selectivity separation of p‐cresol 2 and m‐cresol 3 on adsorbents were experimentally investigated using a liquid breakthrough method. The enhanced adsorption capacity of Si‐ZSM‐5 is attributed to the creation of mesopores, which probably led to higher adsorption diffusion. The introduction of K+ into hierarchical ZSM‐5 diminishes the acid sites, strengthens adsorption sites, and reduces the mesopore diameter. Thus, K−Si‐ZSM‐5 possessed higher separation efficiency compared with the parent HZSM‐5. The concentration of AHFS had significant impact on adsorption capacity and the separation efficiency of adsorbents, and AHFS at a concentration of 0.5 M exhibited the optimal adsorption performance. Furthermore, the adsorbent is easy to prepare under laboratory conditions, and through a large scaled‐up breakthrough experiment, it is suitable for practical industrial applications. Also, we propose separation mechanisms of m‐cresol 3 and p‐cresol 2, and these are mainly controlled by shape selection and adsorbent‐adsorbent interactions.

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Section: Introductionsupporting

confidence: 92%

Selective Adsorption of p‐Cresol from a Mixture of m‐Cresol and p‐Cresol over ZSM‐5 with Controlled Micro‐ and Mesoporosity

Guo

et al. 2019

ChemistrySelect

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“…The aggregates showed a higher CO 2 adsorption rate and capacity compared to conventional ZSM‐5. [ 204 ] Similar CO 2 adsorption studies were done by Qian et al. who used organosilanes with different chain lengths: I) trimethoxypropylsilane, II) trimethoxyoctylsilane, and III) trimethoxydodecylsilane.…”

Section: Synthesis Of Hierarchical 10‐mr Zeolitesmentioning

confidence: 79%

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

et al. 2020

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Zeolites are highly crystalline aluminosilicates with welldefined pores that are constructed of SiO 2 and AlO 4 tetrahedra. These tetrahedra can be linked together in different unique ways to form various materials with a specific topology. [1] According to the International Zeolite Association (IZA), more than 250 different topologies, which are all assigned with a three-letter code, have been identified. [2] The micropores in zeolites are typically constructed from 8, 10, or 12 tetrahedral atoms

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“…The selectivity of CO 2 /N 2 (15%/85% in volume) was calculated by using the ideal adsorption solution theory (IAST), which was described particularly in the Appendix A [26].…”

Section: Methodsmentioning

confidence: 99%

Structure Manipulation of Carbon Aerogels by Managing Solution Concentration of Precursor and Its Application for CO2 Capture

Qian

Fei

et al. 2018

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A series of carbon aerogels were synthesized by polycondensation of resorcinol and formaldehyde, and their structure was adjusted by managing solution concentration of precursors. Carbon aerogels were characterized by X-ray diffraction (XRD), Raman, Fourier transform infrared spectroscopy (FTIR), N 2 adsorption/desorption and scanning electron microscope (SEM) technologies. It was found that the pore structure and morphology of carbon aerogels can be efficiently manipulated by managing solution concentration. The relative micropore volume of carbon aerogels, defined by V micro /V tol , first increased and then decreased with the increase of solution concentration, leading to the same trend of CO 2 adsorption capacity. Specifically, the CA-45 (the solution concentration of precursors is 45 wt%) sample had the highest CO 2 adsorption capacity (83.71 cm 3 /g) and the highest selectivity of CO 2 /N 2 (53) at 1 bar and 0 • C.

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Enhanced CO₂ Adsorption Performance on Hierarchical Porous ZSM-5 Zeolite

Cited by 70 publications

References 55 publications

Selective Adsorption of p‐Cresol from a Mixture of m‐Cresol and p‐Cresol over ZSM‐5 with Controlled Micro‐ and Mesoporosity

Selective Adsorption of p‐Cresol from a Mixture of m‐Cresol and p‐Cresol over ZSM‐5 with Controlled Micro‐ and Mesoporosity

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

Structure Manipulation of Carbon Aerogels by Managing Solution Concentration of Precursor and Its Application for CO2 Capture

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Enhanced CO2 Adsorption Performance on Hierarchical Porous ZSM-5 Zeolite

Cited by 70 publications

References 55 publications

Selective Adsorption of p‐Cresol from a Mixture of m‐Cresol and p‐Cresol over ZSM‐5 with Controlled Micro‐ and Mesoporosity

Selective Adsorption of p‐Cresol from a Mixture of m‐Cresol and p‐Cresol over ZSM‐5 with Controlled Micro‐ and Mesoporosity

State of the Art and Perspectives of Hierarchical Zeolites: Practical Overview of Synthesis Methods and Use in Catalysis

Structure Manipulation of Carbon Aerogels by Managing Solution Concentration of Precursor and Its Application for CO2 Capture

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Enhanced CO₂ Adsorption Performance on Hierarchical Porous ZSM-5 Zeolite