Recent advances in mechanochemical production of
The yield from ball milling pretreated cellulose (84.5%) was higher than that from ionic liquid pretreated cellulose (78.0%). In addition to high efficiency, ball milling pretreatment is environmentally friendly with simple operations. Ball milling is a physical process that eliminates the use of potentially hazardous chemical reagents.
New insights into the autofluorescence properties of cellulose
Abstract. This work explored the fluorescence properties of nano/cellulose isolated from bleached softwood kraft pulp by TEMPO oxidation. Fluorescence spectra showed that all samples exhibited a ...
Hydrolysis of regenerated cellulose from ionic liquids and …
ff technique to reduce cellulose, its mechanical grinding charac-teristics raises several issues, including high energy consump-tion, prolonged milling time, and damage to …
Hydrolysis of regenerated cellulose from ionic liquids and deep
The hydrolysis kinetics of the regenerated cellulose from ILs and DES were examined at 150 °C using sulfonated carbon catalysts and compared with those of the ball-milled cellulose. Overall, the cellulose pretreatment using the ILs and the DES had superior kinetics for cellulose hydrolysis to the conventional ball milling treatment, suggesting ...
Synthesis and characterization of triazole based sulfonated
Herein, we present the synthesis and characterization of triazole doped sulfonated nanocrystalline cellulose for high temperature fuel cell. Materials and methods. ... (2016) A comparison of cellulose nanocrystals and cellulose nano Fi Bres extracted from bagasse using acid and ball milling methods. Adv Nat Sci Nanosci Nanotechnol 7(3):1–9.
Cellulosic value-added products from sugarcane bagasse | Cellulose
Through the application of ball milling and conventional acid hydrolysis, Sofla et al. produced CNF with increased length and high aspect ratio (Sofla et al. 2016), ... Sulfonated cellulose from MCC is used as a separator membrane in lithium-ion batteries for electrical vehicles as it has high ionic conductivity, and the sustainability of this ...
Carbon-based heterogeneous catalysts for conversion of cellulose …
They observed that ball milling of cellulose, well-dispersed Ru-nanoparticles, suitable acidic sites, and synergistic effect of Ru and –SO 3 H groups were primarily responsible for excellent catalytic activity and selectivity. Moreover, the catalyst was stable, as, after the fifth run, 90.3% conversion and 54.4% sorbitol yield were obtained.
Catalysts | Free Full-Text | Synthesis of Sulfonated …
Mechanochemical pretreatment (ball milling) of waste mask and sulfonated group precursor, followed by thermal carbonization under nitrogen gas, were used to synthesize sulfonated porous carbon. The …
Ball milling as a mechanochemical technology for fabrication of …
Mechanochemical technique aims to strike a balance between defect formation via ball milling and size adjustment of a solid grain to nanoscale (<1000 nm) (Ullah et al., 2014).During the process, a high-energy mill is employed and a specific powder charge is placed along with a milling medium (Lin et al., 2017).The kinetic energy …
Direct conversion of cellulose to glucose and valuable
In fact the tight packing of cellulose chains in microfibrils protects the β-1,4-glycosidic linkages between the glucose units, making the cellulose hard to attack and deconstruct. Harsh hydrolysis conditions very often preceded by a pretreatment (e.g. partial chemical degradation or physical degradation such as ball milling) are thus required ...
Roles of Ball Milling Pretreatment and Titanyl Sulfate in the …
Production of 5-hydroxymethylfurfural (HMF) from cellulose has been expected for a long time, but most catalytic systems generally give low yield and selectivity due to the difficulty of balancing cellulose deconstruction with the uncontrollable degradation of the target product under harsh conditions. Here we show that the ball milling pretreatment could markedly …
Acid-Assisted Ball Milling of Cellulose as an Efficient Pretreatment
Ball milling of cellulose in the presence of a catalytic amount of H2SO4 was found to be a promising pre-treatment process to produce butyl glycosides in high yields. …
Sulfonated silica/ carbon nanocomposites as novel catalysts for
Onda et al. were the first to study the conversion of ball-mill pretreated cellulose over sulfonated activated carbon catalysts, and they achieved a notable glucose yield of 41%. 8 Suganuma et al. investigated the catalytic performance of amorphous carbon bearing SO 3 H, COOH, and OH functional groups. 9 The authors reported 68% cellulose ...
A co-production of sugars, lignosulfonates, cellulose, and …
etary ball mill (Across International Co., USA) was used with a 5-liter capacity steel container and steel balls of ø5 mm, ø10 mm, and ø20 mm for 80 min and 120 min milling time, respectively. One jar was loaded with a ball-to-material ratio (BMR) of 29.6:1. The rotation speed of the disc was maintained at 270 rpm with one rotation direction ...
Synthesis of novel water-soluble sulfonated cellulose
The 2,3-dialdehyde cellulose (4.00 g) was dispersed in deionized water (100.00 mL) and reacted with sodium bisulfite (6.00 g, 57.65 mmol).After stirring for 72 h at rt, the resulting product was dialyzed using cellulose acetate membrane (MWCO 5000) followed by freeze drying.All the samples were prepared using the same amount of …
Magnetic core–shell Fe3O4@C-SO3H nanoparticle catalyst for
Prior to the hydrolysis reaction, the cellulose (Avicel ®, microcrystalline Merck, Germany) was pretreated by ball-milling at room temperature for 4 days with ZrO 2 balls and a speed of 100 rpm. The hydrolysis of cellulose was carried out in a stainless-steel autoclave lined with Teflon (100 mL) in air without stirring.
Robert WOODWARD | Tenure-Track Assistant Professor of
The Cover image is an artistic representation of the collision model for the ball mill operation effecting the mechanocatalytic depolymerization of (ligno-)cellulose resulting in water-soluble ...
Efficient hydrolyzation of cellulose in ionic liquid by novel
To improve the reaction efficiency, ball-milling and solubilization in ionic liquids of cellulose were adopted. A maximum total reducing sugar yield of 81.8 % was obtained in ionic liquid 1-butyl-3-methyl imidazolium chloride at 125 °C for 90 min when the water addition was 10 % of ionic liquid. ... (GCS). The sulfonated solid acids of ...
Ball milling: a green technology for the preparation and
Ball milling is a simple, fast, cost-effective green technology with enormous potential. One of the most interesting applications of this technology in the eld of cellulose is the …
Cellulose Depolymerization over Heterogeneous Catalysts
Ball milling of cellulose and Ru/AC together to promote contact between substrate and catalyst increased the yield of sorbitol to 58% along with 9% mannitol under 0.9 MPa H 2 pressure. ... The hydrolysis of cellulose over sulfonated carbons was promoted greatly by elevating the sulfonation temp. With 250 °C-sulfonated CMK-3 as a …
Effects of Crystallinity on Dilute Acid Hydrolysis of Cellulose by
The dilute acid (0.05 M H2SO4) hydrolysis at 175 °C of samples comprised of varying fractions of crystalline (α-form) and amorphous cellulose was studied. The amorphous content, based on XRD and CP/MAS NMR, and the product (glucose) yield, based on HPLC, increased by as much as a factor of 3 upon ball milling. These results are …
A novel magnetic carbon-based solid acid catalyst suitable for
A sucralose-derived magnetically separable carbon-based solid acid catalyst with cellulose-binding and catalytic sites has been successfully prepared by incompletely carbonizing the sulfonated sucralose with Fe 3+ at high temperature to load ɤ-Fe 2 O 3 nanoparticles onto the surface of the catalyst. The resultant magnetic catalyst was fully …
Synthesis and characterization of sulfonated activated carbon as …
The highest bio-jet fuels (aromatics and C9-16 alkanes) obtained was 97.51% using the SAC catalyst sulfonated at 100 °C for 5 h. Results showed that SAC has great potential as catalyst in the co-pyrolysis of biomass and plastics …
Mechanocatalytic Depolymerization of Cellulose With …
Aquivion PW98, sulfonated SBA-15 and sulfonated mesoporous carbon (CMK-3-SO 3 H) were either synthesized, or purchased, and initially screened as potential solid acid catalysts for the effective depolymerization of cellulose via ball-milling. More information on these solid acid catalysts are provided in the supporting information (SI).
Roles of Ball Milling Pretreatment and Titanyl Sulfate in the …
Here we show that the ball milling pretreatment could markedly facilitate the conversion of microcrystalline cellulose to HMF by titanyl sulfate (TiOSO 4). The ball milling …
Efficient Microwave-Assisted Hydrolysis of Microcrystalline Cellulose
Abstract A feasible approach was developed to quickly hydrolyze microcrystalline cellulose (MCC) into glucose using a new carbon-based solid catalyst (CSC). The catalysts possessed the structure of mesoporous carbon with weak acidic carboxylic and phenolic groups. 83.94% yield of glucose was achieved at 200 °C for 50 …
Hydrolysis of cellulose to glucose over carbon catalysts …
microcrystalline cellulose was pre-treated by ball-milling for 48 hours in order to decrease the crystallinity (Fig. S3†). 19 The hydrolysis of cellulose was performed under the following con-
Production of cellulose nanofibrils: A review of recent advances
Ball milling. Ball milling is another technique which was reported very recently for the production of CNF. In this method, a cellulose suspension is placed in a hollow cylindrical container, partially filled with balls (e.g., ceramic, zirconia or metal). While the container rotates, cellulose is disintegrated by the high energy collision ...
Sulfonated cellulose nanofibrils obtained from wood pulp through
The consecutive pre-treatment of cellulose with periodate and bisulfite was used as a new potential method to promote nanofibrillation of hardwood pulp and to obtain nanofibrils with sulfonated functionality. Nanofibrils having typical widths of 10–60 nm were obtained from sulfonated celluloses having low anionic charge densities (0.18–0.51 …
Hydrolysis of cellulose into glucose over carbons sulfonated …
Prior to the hydrolysis reaction, the microcrystalline cellulose (Avicel) was pretreated by ball-milling at room temperature for 48 h, with ZrO2 balls and a speed of 500 rpm (PM 100, RETSCH ball mills, 50 ml). The hydrolysis of cellulose was carried out in a stainless-steel autoclave with autogenous pressure.