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sulfonated cellulose ball milling

sulfonated cellulose ball milling

  • Ball milling for cellulose depolymerization and

    To reveal the structural changes of cellulose after ball milling pretreatment, the crystallinity was monitored by XRD patterns ()For microcrystalline cellulose (BM0), three characteristic reflections, ie, (101), (10 1 ¯) and (002), of Cellulose I were observedIt is observable that the characteristic shape of Cellulose I crystal structure became less intense asReaction conditions: cellulose pretreated by ballmilling 005 g, catalyst 005 g, water 5 mL, reaction time 24 h, temperature 423 K With this knowledge in mind, we focused on the hydrolytic conversion of cellulose on the new class of sulfonated silica/carbon nanocomposites ( Fig 2 )Sulfonated silica/ carbon nanocomposites as novelBallmilling induced amorphization promotes a substantially higher substrate reactivity, because homogeneous hydrolysis occurs preferentially from less ordered structural domains in cellulose In contrast, concerted ballmilling (CBM) of cellulose with the sulfonated carbon promotes a heterogeneously catalyzed hydrolysis to solubleMechanochemistryassisted hydrolysis of softwood over

  • Roles of Ball Milling Pretreatment and Titanyl Sulfate in

    Production of 5hydroxymethylfurfural (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 facilitate theCellulose (Avicel PH101, microcrystalline) was characterized (i) as received from SigmaAldrich and (ii) after 24 h ballmilling pretreatment Ballmilling with 25 g of cellulose was carried out using ZrO2 balls (mass 75 g; diameter 18 cm) SEM images of cellulose before and after ballmilling are given in Figure S5Electronic Supplementary Information for SulfonatedPang et al employed sulfonated carbon at elevated temperatures for the hydrolysis of cellulose pretreated by ballmilling for 48 h The sulfonation of the carbon materials was carried out by boiling the carbon materials in concentrated sulfuric acid (15 mL per gram of carbon) at 150–300 °C for 24 h under N 2 atmosphereCatalytic ethanolysis of microcrystalline cellulose over a

  • (PDF) Sulfonated silica/carbon nanocomposites

    Hydrolytic conversion of cellulose over heterogeneous acids Reaction conditions: cellulose pretreated by ballmilling 005 g, catalyst 005 g, water 5 mL,pretreated by ballmilling 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 stainlesssteel autoclave with autogenous pressure For each reaction, 027 g of cellulose, 03 g of catalyst and 27 mlHydrolysis of cellulose into glucose over carbonsCellulose can be grinded in different types of ball mills, namely tubular, planetary or vibration mill In our case, a ball mill of 2500x3000mm is used for grinding; the main electric motor has a power of 160kW The armor in the mill is made of rubber, wavyshaped plates with small elevators The load of the mill is 20tTHE CELLULOSE GRINDING energosteel

  • Roles of Ball Milling Pretreatment and Titanyl Sulfate in

    Production of 5hydroxymethylfurfural (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 facilitate theAmorphous cellulose1 (pretreated by phosphoric acid) was more likely to be degraded than amorphous cellulose2 (pretreated by ballmilling) because of the lower crystallinity, and the TRS and glucose yields reached 783% and 697%, respectively, after an 8h reaction (Entry 9)Enhanced hydrolysis of cellulose by highly dispersedHydrolytic conversion of cellulose over heterogeneous acids Reaction conditions: cellulose pretreated by ballmilling 005 g, catalyst 005 g, water 5 mL, reaction time 24 h, temperature 423 K(PDF) Sulfonated silica/carbon nanocomposites

  • Electronic Supplementary Information for Sulfonated

    Cellulose (Avicel PH101, microcrystalline) was characterized (i) as received from SigmaAldrich and (ii) after 24 h ballmilling pretreatment Ballmilling with 25 g of cellulose was carried out using ZrO2 balls (mass 75 g; diameter 18 cm) SEM images of cellulose before and after ballmilling are given in Figure S5cellulose with Aquivion PW 98 (mass of cellulose, 1 g; catalyst, 05 g; milling speed, 400 rpm; zirconium oxide balls diameter, d MB, 10 mm; ballmilling time, 24(PDF) Mechanocatalytic Depolymerization of CelluloseCellulose can be grinded in different types of ball mills, namely tubular, planetary or vibration mill In our case, a ball mill of 2500x3000mm is used for grinding; the main electric motor has a power of 160kW The armor in the mill is made of rubber, wavyshaped plates with small elevators The load of the mill is 20tTHE CELLULOSE GRINDING energosteel

  • One Pot Synthesis of BioEthylene Glycol from Cellulose

    Long ball milling time would increase the contact between these two solids The ball milling time and the functional groups on active carbon play important roles in this reaction The results demonstrated that one pot synthesis of EG from cellulose is economically and technically feasibleThe yield from ball milling pretreated cellulose (845%) was higher than that from ionic liquid pretreated cellulose (780%) 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 reagentsRecent advances in mechanochemical production ofThis study demonstrated the technical potential for the largescale coproduction of sugars, lignosulfonates, cellulose, and cellulose nanocrystals Ballmilled woods with two particle sizes were prepared by ball milling for 80min or 120min (BMW80, BMW120) and then enzymatically hydrolyzed 783% cellulose conversion of BMW120 was achieved, which wasA coproduction of sugars, lignosulfonates, cellulose, and

  • Bridging the gap between cellulose chemistry and

    CH2 scissoring motion in the cellulose I crystal The ballmilling allows the regular arrangement of the CH2OH group on C6 to relax into a more random one, resulting in a broader band at 1430 cm1 Figure 4: IR spectra of cellulose before (a) and after ballmilling (b) 12 Hydrolysis of cellulose to glucoseby using ball milling pretreatment, neutral sulfite delignification, and cellulose upgradation, generating four target products (sugars, lignosulfonates, cellulose, and cellulose nanocrystals) The product yields are balanced to provide an intuitive view of the integrated profitability of multiproducts In order to coproduce more prodA coproduction of sugars, lignosulfonates, cellulose,Production of 5hydroxymethylfurfural (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 facilitate theRoles of Ball Milling Pretreatment and Titanyl Sulfate in

  • A coproduction of sugars, lignosulfonates, cellulose, and

    Ballmilled woods with two particle sizes were prepared by ball milling for 80min or 120min (BMW 80, BMW 120) and then enzymatically hydrolyzed 783% cellulose conversion of BMW 120 was achieved, which was three times as high as the conversion of BMW 80Amorphous cellulose1 (pretreated by phosphoric acid) was more likely to be degraded than amorphous cellulose2 (pretreated by ballmilling) because of the lower crystallinity, and the TRS and glucose yields reached 783% and 697%, respectively, after an 8h reaction (Entry 9)Enhanced hydrolysis of cellulose by highly dispersedCellulose can be grinded in different types of ball mills, namely tubular, planetary or vibration mill In our case, a ball mill of 2500x3000mm is used for grinding; the main electric motor has a power of 160kW The armor in the mill is made of rubber, wavyshaped plates with small elevators The load of the mill is 20tTHE CELLULOSE GRINDING energosteel

  • Hydrothermally Stable Sulfonated Carbons as Solid Acid

    The propensity of cellulose to undergo autohydrolysis could be enhanced by amorphizing its crystal structure through mechanical pretreatment in ballmill A heterogeneously catalyzed hydrolysis was achieved through mechanocatalytic processes facilitated by the concerted ballmilling (CBM) of the sulfonated carbon with the substrateDirect depolymerization of crystalline cellulose into watersoluble sugars by solventfree ball milling was examined in the presence of a strongly acidic layered metal oxide, HNbMoO 6, resulting in full conversion with 72 % yield of watersoluble sugarsMeasurements by 13 C crosspolarization magic angle spinning NMR spectroscopy and Xray diffraction revealed thatMechanochemical Decomposition of Crystalline CelluloseLong ball milling time would increase the contact between these two solids The ball milling time and the functional groups on active carbon play important roles in this reaction The results demonstrated that one pot synthesis of EG from cellulose is economically and technically feasibleOne Pot Synthesis of BioEthylene Glycol from Cellulose

  • Selective Hydrolysis of Cellulose and Polysaccharides

    Ballmilling treatment of microcrystalline cellulose resulted in an insoluble material with β1,4glycosidic bonds but containing large noncrystalline regions as confirmed by XRD and CP/MAS 13C NMR21) The reaction rate of cellulose hydrolysis using dilute sulfuric acid at 448 K increased with decreasing cellulose crystallinity21)Feng Shen, Shuang Sun, Jirui Yang, Mo Qiu, Xinhua Qi*, Coupled pretreatment with liquid nitrogen and ball milling for enhanced cellulose hydrolysis in water, ACS Omega, 2019, 4(7): 1175611759 DOI: 101021/acsomega9b01406 24漆新华 Nankai University

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