“Burr Puzzle”-Like Hierarchical Beta zeolite composed of crisscrossed nanorods

Li, Shiqing; Si, Xiaomeng; Peng, Rusi; Pan, Huang; Xu, Hao; Jiang, Jingang; Ma, Yao; Wu, Peng

doi:10.1016/j.micromeso.2022.111843

Cited by 7 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The product was collected by filtration, washing with distilled water, and drying at 373 K for 12 h. Then, an acid treatment by 2.0 M HNO 3 aqueous solution was performed with a solid-to-liquid weight ratio of 1:50 at 413 K for 12 h to remove extra-framework Ti, followed by calcination at 823 K for 6 h. For comparison, TS-1 zeolites were prepared following a reported protocol [18] . Ti-MOR zeolites were obtained by commercial H-MOR combining dealumination and TiCl 4 treatment, according to the previous work [34,35] .…”

Section: Synthesis Of Different Titanosilicatesmentioning

confidence: 99%

Hydrophilic Ti-MWW for catalyzing epoxidation of allyl alcohol

Gong,

Tuo,

Wang

et al. 2024

Chem Synth

Self Cite

View full text Add to dashboard Cite

Titanosilicates are widely applied in the alkene epoxidation reactions with high reaction rate and selectivity to desired products. Their catalytic performance depends on the structure topology, the micro-environment of Ti active sites, and the hydrophobicity/hydrophilicity of zeolite framework. Herein, we focus on a hydrophilic substrate of allyl alcohol (AAL) and investigated catalytic performance of four titanosilicates (TS-1, Ti-MOR, Ti-MWW, and Re-Ti-MWW) in the AAL epoxidation reaction with hydrogen peroxide as the oxidant. Among them, Re-Ti-MWW, synthesized via the post-modification of Ti-MWW with piperidine, exhibited the highest activity. Moreover, the preferred solvent changed from MeCN for Ti-MWW to H2O for Re-Ti-MWW. The relative diffusion rate of AAL over Re-Ti-MWW was up to 466 × 10-7 s-1, much larger than those of other zeolites. The higher diffusion rate of Re-Ti-MWW was probably derived from the higher framework hydrophilicity as revealed by the smaller water contact angle of Re-Ti-MWW compared to the other zeolites, which contributed to the high activity in AAL epoxidation. In the continuous slurry reactor, Re-Ti-MWW achieved a high catalytic lifetime of 163 h, with the selectivity of desirable glycidol product maintained at > 97% in the H2O solvent system, showing high potential as an industrial catalyst for the AAL epoxidation reaction.

show abstract

Section: Synthesis Of Different Titanosilicatesmentioning

confidence: 99%

Hydrophilic Ti-MWW for catalyzing epoxidation of allyl alcohol

Gong,

Tuo,

Wang

et al. 2024

Chem Synth

Self Cite

View full text Add to dashboard Cite

show abstract

“…The combustion of sulfur in fuel oil will lead to the production of SO x in vehicle engines. 1 The toxic SO x released into the air can form sulfonation smoke particles with ozone, 2 other gases and particles, which will have a serious impact on the environment, 3 and also cause irreversible toxicity to metal catalysts. In addition, several heterocyclic sulfides in the exhaust gas of fuel oil combustion are considered to be carcinogens and mutagens, which are potentially harmful to human health.…”

Section: Introductionmentioning

confidence: 99%

Catalytic oxidative desulfurization performance of a modified nano-sized β zeolite loaded with different structural polyoxometalates

Li,

Song

et al. 2024

New J. Chem.

View full text Add to dashboard Cite

show abstract

“…14 On the other hand, Zhao et al obtained the nanocrystal high-silica Beta zeolite, 15 and Li et al synthesized the Beta nanorods with a hierarchical pore system. 16 These two Beta catalysts both possessed attractive propylene selectivity in MTP reaction. The crystal morphology was also demonstrated to influence the MTO performance of CHA-type SAPO-34 catalyst.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Wu and co-workers confirmed that the lifetime and selective production of propylene in MTP reaction over highly dealuminated mordenite zeolites were closely related to the crystal size along the c -axis of MOR topology, whereas the MOR nanosheets synthesized with b -axis orientation exhibited a highly ethylene selectivity for methanol-to-olefin (MTO) reaction . On the other hand, Zhao et al obtained the nanocrystal high-silica Beta zeolite, and Li et al synthesized the Beta nanorods with a hierarchical pore system . These two Beta catalysts both possessed attractive propylene selectivity in MTP reaction.…”

Section: Introductionmentioning

confidence: 99%

A Nanostrips-Assemble Morphology of ZSM-5 Zeolite for Efficient Propylene Production from Methanol Conversion

Peng

Zheng

et al. 2023

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

Turning the morphology and orientated growth of zeolite crystals is essential to alter their catalytic performances. MFI-type ZSM-5 nanostripes (named as D-Z5) with a sea-urchin-like overall morphology were directly synthesized with a commercially available and small-molecular organic structure-directing agent (OSDA) of 1-butyl-1-methylpyrrolidinium hydroxide. Their nanostrip crystals exhibited a unique dioriented morphology with thin thicknesses of ∼8 nm and ∼70 nm along the a-axis and b-axis, respectively. The dealuminated D-Z5 displayed higher propylene selectivity (∼57%), longer lifetime (60 h) and much higher propylene-to-ethylene ratio (>12) in methanol-to-propylene (MTP) reaction than those conventional ZSM-5 with known crystal morphologies. Computational simulation and experimental measurements provided solid proof that the diorientated crystals decreased the bulky molecular diffusion resistance, postponed the secondary reaction and then promoted propylene to diffuse rapidly out of two sets of micropores in zeolites. This unusual diorientation phenomenon is not only beneficial for improving the MTP catalytic performance of ZSM-5, but also expected to be versatile to develop other useful zeolite catalysts.

show abstract

“Burr Puzzle”-Like Hierarchical Beta zeolite composed of crisscrossed nanorods

Cited by 7 publications

References 34 publications

Hydrophilic Ti-MWW for catalyzing epoxidation of allyl alcohol

Hydrophilic Ti-MWW for catalyzing epoxidation of allyl alcohol

Catalytic oxidative desulfurization performance of a modified nano-sized β zeolite loaded with different structural polyoxometalates

A Nanostrips-Assemble Morphology of ZSM-5 Zeolite for Efficient Propylene Production from Methanol Conversion

Contact Info

Product

Resources

About