Hierarchical Zeolitic Imidazolate Framework‐8 Catalyst for Monoglyceride Synthesis

Wee, Lik Hong; Lescouet, Tristan; Ethiraj, Jayashree; Bonino, Francesca; Vidruk, Roxana; Garrier, Eva; Packet, Dirk; Bordiga, Silvia; Farrusseng, David; Herskowitz, M.; Martens, Johan A.

doi:10.1002/cctc.201300581

Cited by 85 publications

(71 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…More importantly, the loading of CO 2 on ZIF-8_A1 is always higher than that on C-ZIF-8. As the micropore surface area of ZIF-8_A1 (1158 m 2 g -1 ) is much smaller than that of C-ZIF-8 (1355 m 2 g -1 ), the enhanced diffusion rate of ZIF-8_A1 can be attributed to the presence of many more mesopores and macropores which allow quick diffusion of the guest molecules to the active centers [42,44]. Similar profiles are observed for CH 4 adsorption on the ZIF-8_A1 and C-ZIF-8 samples (Fig.…”

Section: Enhancement Of Co 2 /Ch 4 Adsorption and Selectivitymentioning

confidence: 99%

Rapid room-temperature synthesis of hierarchical porous zeolitic imidazolate frameworks with high space-time yield

Duan

Xiao

et al. 2017

Sci. China Mater.

View full text Add to dashboard Cite

Hierarchical porous zeolitic imidazolate frameworks (ZIFs) have potential for adsorption, catalysis and chemical sensing applications. Ultrafast synthesis of ZIFs at room temperature and pressure is particularly desirable for large-scale industrial production. Here, we developed a green and versatile method using organic amines as supramolecular templates (organic amine-template) to rapidly synthesize hierarchical porous ZIFs (ZIF-8, ZIF-61 and ZIF-90) at room temperature and pressure. The synthesis time was reduced dramatically to within 1 min, and the resulting ZIFs had multimodal hierarchical porous structures with mesopores/ macropores interconnected with micropores. Notably, the space-time yield (STY) of hierarchical porous ZIF-8 was up to 1.29×10 4 kg m -3 d -1 , which is more than three times higher than that reported using other methods. Furthermore, the morphologies and porosities of the produced ZIFs could be readily tuned by controlling the synthesis time or type of organic amine. The organic amine played two roles in the synthesis: (1) a protonation agent to deprotonate organic ligands, facilitating the formation of ZIF crystals, and (2) an structure directing agent to direct mesopore/macropore formation. The resulting hierarchical porous ZIF-8 exhibited enhanced uptake capacities and diffusion rates for guest molecules relative to its microporous counterpart. This work provides a new direction for the green and efficient synthesis of various hierarchical porous ZIFs with high STYs for a wide range of applications.

show abstract

Section: Enhancement Of Co 2 /Ch 4 Adsorption and Selectivitymentioning

confidence: 99%

Rapid room-temperature synthesis of hierarchical porous zeolitic imidazolate frameworks with high space-time yield

Duan

Xiao

et al. 2017

Sci. China Mater.

View full text Add to dashboard Cite

show abstract

“…More recently the use of Sn-metal organic framework and zeolitic imidazolate framework in t-butanol has been proposed for this reaction [29,30]. Selectivity to monoglycerides was very high but conversion never exceeded 60 %.…”

Section: Resultsmentioning

confidence: 99%

The use of rice bran oil within a biorefinery concept

Zaccheria

Mariani

Ravasio

2015

Chem. Biol. Technol. Agric.

View full text Add to dashboard Cite

Background: A waste of the rice production chain, namely bran, can be used to produce an oil with a very high content in free fatty acids (FFA). Due to its very high acidity, this material cannot be used neither to feed power generators nor as raw material for oleochemicals synthesis, and therefore it is not even extracted. Results: Rice bran oil with a content of 84 % in free fatty acids can be converted into a mixture of triglycerides or into useful oleochemicals such as monoglycerides, widely used as emulsifiers in food. Monoglycerides were obtained carrying out a one step esterification + transesterification reaction over an amorphous solid acid. Yields are higher than those obtained by enzymatic transesterification of oil and competitive with the esterification of free fatty acids involving the use of homogeneous acids generating significant amounts of wastewaters. On the other hand, esterification with higher amount of glycerol, a low value by-product of the biodiesel industry, gave an oil with low acidity suitable to feed power generators. Conclusions:The use of solid acid catalysts is a valuable tool for the valorization of rice bran oil. The chance to produce a low acidity oil or monoglycerides in one step from RBO may add value to the whole rice productive chain while setting the stage for the design of biorefineries based on the use of agro-industrial residues.

show abstract

“…Several MOFs for example have been shown to be active in transesterification reactions. 4,5 In particular, one exceptionally stable 6 MOF type, zeolite imidazolate framework ZIF-8, is active in the (trans)esterification reactions, 7,8 as well is in the range of other acid-base catalysed reactions. [9][10][11][12] However, it is not straightforward to identify the catalytic active sites from the crystal structure of ZIF-8.…”

mentioning

confidence: 99%

“…Wee et al described spontaneous formation of mesopores in ZIF-8 during the direct glycerol esterification with oleic acid. 8 They proposed that oleic acid treatment alone can be a viable procedure for mesopore introduction. We applied the suggested oleic acid treatment to ZIF-8, which resulted in crystals etching (Figure 4A,B).…”

mentioning

confidence: 99%

“…The bulk-scale catalytic activity of the etched ZIF-8 based on the measured fluorescein concentration was estimated to be about 80% of the activity of the original catalyst sample. It is important to note that in the study of Wee et al 8 etched sample activity could not be compared with original sample due to oleic acid etching being the inherent side reaction. To the best of our knowledge no other investigation was studying the effect of oleic acid on structure and activity of ZIF-8.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Surface acid–base catalytic activity of ZIF-8 revealed by super-resolution fluorescence microscopy

Kubarev

Roeffaers

2017

CrystEngComm

View full text Add to dashboard Cite

show abstract

Hierarchical Zeolitic Imidazolate Framework‐8 Catalyst for Monoglyceride Synthesis

Cited by 85 publications

References 64 publications

Rapid room-temperature synthesis of hierarchical porous zeolitic imidazolate frameworks with high space-time yield

Rapid room-temperature synthesis of hierarchical porous zeolitic imidazolate frameworks with high space-time yield

The use of rice bran oil within a biorefinery concept

Surface acid–base catalytic activity of ZIF-8 revealed by super-resolution fluorescence microscopy

Contact Info

Product

Resources

About