@article {49295,
	title = {Continuous flow synthesis of hierarchical low silica X zeolite},
	journal = {Materials Today Communications},
	volume = {39},
	year = {2024},
	month = {JUN},
	pages = {109047},
	type = {Article},
	abstract = {<p>
	Zeolites, renowned for their versatile applications in catalysis, adsorption, and ion exchange, have long been synthesized using conventional batch processes. However, the inherent limitations of these methods, such as resource-intensive conditions and inconsistent product quality, underscore the need for a sustainable and efficient approach. In this study, a continuous flow synthesis process was established for the synthesis of industrially important low silica X (LSX) zeolite using a tubular reactor. The synthesis gel was subjected to aging for 5 days at room temperature to facilitate nucleation and crystal growth combined with the fast-heating rate in a tubular reactor at 363 K \&amp; 1.1 atm., which in turn produces LSX after 40 min. The synthesized product was confirmed by the XRD, FE-SEM, EDS, XRF, TEM, and N2 adsorption-desorption; the data was compared with the LSX sample synthesized by batch process. The result implies that LSX prepared by continuous flow has a pure phase of LSX with the hierarchical structure, which provides better adsorption capacity of CO2 at 298 K up to 20 bar. Due to continuous flow synthesis, the crystallization time was reduced and faster kinetics which may be helpful for scale-up the process for LSX synthesis.</p>
},
	keywords = {Adsorption, Carbon dioxide, continuous flow, Low silica X, Tubular reactor, zeolites},
	doi = {10.1016/j.mtcomm.2024.109047},
	author = {Adarsh, V. K. and Shrotri, Aadesh R. and Birje, Amit R. and Nandanwar, Sachin U.}
}
@article {49022,
	title = {Performance of Li exchange hierarchical X zeolite for CO2 adsorption and H2 separation},
	journal = {Journal of Industrial and Engineering Chemistry },
	volume = {133},
	year = {2024},
	month = {MAY },
	pages = {505-514},
	type = {Article},
	abstract = {<p>
	Li exchange hierarchical X zeolite (Li-H-X) was prepared by decationization of X zeolite by NH4Cl solution followed by Li exchange and subsequent calcination. NH4-X and Li-X were prepared to compare the results of LiH-X. XRD, FE-SEM, EDS, N2 adsorption-desorption, and micro-/mesoporous volume were performed. The higher mesoporosity was confirmed in Li-H-X due to the framework dealumination during decationization. Static and dynamic sorption capacity of sorbents was evaluated to identify the performance of sorbent. The CO2 and H2 equilibrium adsorption capacity of Li-H-X was found to be 9.6 mmol g-1 and 0.78 mmol g-1, respectively, at 298 K and 20 bar, which was 25 \% (CO2) and 30 \% (H2) higher than Li-X. Static experimental data were validated using the Langmuir, Freundlich, and Sips models. The CO2 \&amp; H2 dynamic sorption capacity of Li-H-X sorbent for binary gas (CO2/H2, 25/75 \%) was 4.145 mmol g-1 and 0.258 mmol g-1 at 303 K and 10 bar. The higher sorption capacity of Li-H-X was obtained due to large micro-/mesoporous volume of sorbent, which may allow to access unoccupied sites at higher pressure. This result reveals that micro-/mesoporous structure of zeolite adsorbs significantly higher CO2 from binary gas stream, which can use to separate pure H2 from gas stream.</p>
},
	keywords = {Adsorption, Carbon dioxide, Hydrogen, Microporous-mesoporous, Separation},
	issn = {1226-086X},
	doi = {10.1016/j.jiec.2023.12.027},
	author = {Shrotri, Aadesh R. and Birje, Amit R. and Niphadkar, Prashant S. and V. Bokade, Vijay and Mali, Nilesh A. and Nandanwar, Sachin U.}
}
