Production of ethylene glycol from direct catalytic conversion of cellulose over a binary catalyst of metal-loaded modified SBA-15 and phosphotungstic acid

Yu, Shitao; Cao, Xincheng; Liu, Shiwei; Lü, Li; Wu, Qiong

doi:10.1039/c8ra03806f

Cited by 20 publications

(13 citation statements)

References 32 publications

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“…However, the polyols yield remained low, owing to the lack of reactive active sites. After adding W species, the cellulose conversion rate increased from 78.4% to 98.3% (Table , entries 5 and 7), which can be ascribed to the acid sites offered by W species for the hydrolysis of cellulose. , For the sample containing only nickel (Table , entry 6), the cellulose conversion rate was 92.3%. Notably, the EG yield was increased to 27.1%, owing to the high-hydrogenation performance of Ni .…”

Section: Resultsmentioning

confidence: 96%

“…As the most abundant biomass resources on Earth, cellulose is considered a critical renewable bioresource for replacing fossil fuels. Cellulose is composed by d -glucose units through β-1,4-glycoside bond linkages, which is the reason cellulose is considered to be a highly crystalline polymer . The stable chemical property of cellulose results from lots of intra- and intermolecular hydrogen bonds, leading to a big challenge in conversion of cellulose to various high-value-added chemicals.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Liu

Zhou

et al. 2020

ACS Sustainable Chem. Eng.

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Direct conversion of cellulose into ethylene glycol is a promising route for transforming sustainable biomass resources into high-value chemicals. Although numerous attempts have been made to exploit tungsten-based hydrogenolysis catalysts in the catalytic conversion of cellulose to ethylene glycol for high conversion rate and selectivity, maintaining catalyst stability remains challenging. Herein, we have developed a Ni−W/M catalyst with good catalytic performance and stability, which were obtained by calcining Ni−W/MIL-125(Ti) precursor. The synthesized catalyst showed good cellulose conversion rate (100%) and ethylene glycol yield (68.7%). The tungsten species was linked to the TiO 2 support by Ti−O−W bonds to reduce loss of the active tungsten component. The formation of new bonds enhanced the catalyst stability and durability, enabling the catalysts to retain high catalytic activity during recycling.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Liu

Zhou

et al. 2020

ACS Sustainable Chem. Eng.

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“…Increasing the Pt loading from 0.6 to 1.6% increased the average pore diameter of the Pt@SAPO-11 catalysts from 8.1 to 9.5 nm (Table ), possibly because the support contained both mesopores and micropores. With increases in the Pt loading amount, supported metal nanoparticles can potentially block micropores such that there is a slight increase in the pore diameter …”

Section: Resultsmentioning

confidence: 99%

“…With increases in the Pt loading amount, supported metal nanoparticles can potentially block micropores such that there is a slight increase in the pore diameter. 35 3.4. X-ray Diffraction.…”

Section: Methodsmentioning

confidence: 99%

Decarboxylation of Oleic Acid Using Pt@SAPO-11 Catalysts Fabricated by In Situ Encapsulation

Liu

2021

Energy Fuels

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An in situ encapsulation process was used to prepare ordered worm-like mesoporous Pt@SAPO-11 catalysts with different Pt loadings. Transmission electron microscopy images showed that Pt nanoparticles encapsulated within the SAPO-11 support mesopores were uniformly distributed and highly dispersed and had a narrow particle size distribution of 2–7 nm. Scanning electron microscopy indicated that increasing the Pt loading from 0.6 to 1.6 wt % did not significantly change the crystalline morphology of the catalyst, although the crystallinity decreased slightly. The specific surface area and average pore diameter of the Pt@SAPO-11 were in the ranges of 72–116 m2/g and 8.1–9.5 nm, respectively, which are determined by the Brunauer–Emmett–Teller method and Barrett–Joyner–Halenda method, respectively. The NH3 thermal-programmed desorption established that increasing the Pt loading gradually decreased the total NH3 desorption and that a loading of 1.2 wt % produced the highest concentration of medium-strong acid sites (6.2 cm3/g STP). X-ray photoelectron spectroscopy and H2 temperature-programmed reduction showed that a Pt loading of 1.2 wt % gave the strongest interaction between Pt nanoparticles and the SAPO-11 support. The Pt@SAPO-11 catalysts were used for the preparation of C8–C17 alkanes by decarboxylation of oleic acid. Employing a reaction temperature of 340 °C, a CO2 atmosphere, a Pt loading on the catalyst of 1.2 wt %, and a reaction time of 4 h, 100% oleic acid conversion was obtained together with an 80% yield of C8–C17 alkanes.

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“…It is more difficult/expensive to recycle the EG fraction of the PET hydrolysate than the terephthalate fraction, because of EG’s high solubility in water and high boiling point (Tournier et al, 2020). EG could also be obtained from cellulosic wastes via a one-pot heterogeneous catalytic process that involves hydrolysis, retro-aldol condensation, and hydrogenation (Hamdy et al, 2017; Ji et al, 2009; Wang and Zhang, 2013; Yan et al, 2008; Yu et al, 2018). The process avoids the use of hydrolyzing enzymes but has not been commercialized mainly due to the high purification cost of EG.…”

Section: Introductionmentioning

confidence: 99%

EngineeringEscherichia colito produce aromatic chemicals from ethylene glycol

Panda

Zhou

Feigis

et al. 2023

Preprint

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Microbial overproduction of aromatic chemicals has gained considerable industrial interest and various metabolic engineering approaches have been employed in recent years to address the associated challenges. So far, most studies have used sugars (mostly glucose) or glycerol as the primary carbon source. In this study, we used ethylene glycol (EG) as the main carbon substrate. EG could be obtained from the degradation of plastic and cellulosic wastes. As a proof of concept,Escherichia coliwas engineered to transform EG into L-tyrosine, a valuable aromatic amino acid. Under the best fermentation condition, the strain produced 2 g/L L-tyrosine from 10 g/L EG at approximately 50% of the theoretical yield, outperforming glucose (the most common sugar feedstock) in the same experimental conditions. To prove the concept that EG can be converted into different aromatic chemicals,E. coliwas further engineered with a similar approach to synthesize other valuable aromatic chemicals, L-phenylalanine andp-coumaric acid. Finally, waste polyethylene terephthalate (PET) bottles were degraded using acid hydrolysis and the resulting monomer EG was transformed into L-tyrosine using the engineeredE. coli, yielding a comparable titer to that obtained using commercial EG. The strains developed in this study should be valuable to the community for producing valuable aromatics from EG.

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Production of ethylene glycol from direct catalytic conversion of cellulose over a binary catalyst of metal-loaded modified SBA-15 and phosphotungstic acid

Cited by 20 publications

References 32 publications

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Enhanced Ni/W/Ti Catalyst Stability from Ti–O–W Linkage for Effective Conversion of Cellulose into Ethylene Glycol

Decarboxylation of Oleic Acid Using Pt@SAPO-11 Catalysts Fabricated by In Situ Encapsulation

EngineeringEscherichia colito produce aromatic chemicals from ethylene glycol

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