01810nas a2200265 4500008004100000022001400041245009000055210006900145260007100214300001200285490000600297520089200303653002301195653001801218653001101236653001801247653001001265100002501275700002101300700002501321700002801346700002501374700002901399856011601428 2014 eng d a2168-048500aSingle-pot formation of THFAL via catalytic hydrogenation of FFR over Pd/MFI catalyst0 aSinglepot formation of THFAL via catalytic hydrogenation of FFR  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcFEB a272-2810 v23 a

Furfural (FFR) was selectively hydrogenated in a single pot to tetrahydrofurfuryl alcohol (THFAL) over a Si MFI molecular sieve supported Pd catalyst. Studies on catalyst screening revealed that both the metal function and the support were critical for directing the selectivity to the ringhydrogenated product, THFAL. The structural feature of MFI as shown by XRD was completely retained in the used sample of the 3% Pd/MFI catalyst confirming its stability under reaction conditions. XRD, along with SEM characterization of the used samples, established retention of morphology of the structured silicate, suggesting a strong interaction between hexagonal porous silicate and Pd particles. The complete conversion of FFR with an enhanced selectivity of 95% to THFAL could be achieved by recycling the crude of the first hydrogenation experiment over the same 3% Pd/MFI catalyst.

10aBiomass conversion10aHydrogenation10aPd/MFI10aRecyclability10aTHFAL1 aBiradar, Narayan, S.1 aHengne, Amol, M.1 aBirajdar, Shobha, N.1 aNiphadkar, Prashant, S.1 aJoshi, Praphulla, N.1 aRode, Chandrashekhar, V. uhttps://library.ncl.res.in/content/single-pot-formation-thfal-catalytic-hydrogenation-ffr-over-pdmfi-catalyst-001746nas a2200253 4500008004100000022001400041245006400055210006400119260008600183300001100269490000700280520093000287653002301217653001801240653001401258653001101272653001301283653001901296653000801315653002401323100002301347700002901370856009301399 2016 eng d a0161-494000aSolid acid catalyzed synthesis of furans from carbohydrates0 aSolid acid catalyzed synthesis of furans from carbohydrates a530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcJAN a36-1120 v583 a

The alternative feedstock, biomass (particularly lignocelluloses), having the profuse availability, is promising for the synthesis of several value-added chemicals which are currently obtained from fossil feedstock. In this article, the synthesis of two extremely significant furan chemicals viz. furfural and 5-hydroxymethylfurfural (HMF) are discussed. In the synthesis of furans from biomass, numerous challenges, i.e., use of edible sugars as substrates, selectivity to furans, their isolation in pure form, reuse of catalyst, environmental issues, etc., are perceived and in the recent past researchers tried to resolve those by developing advance methodologies. This article comprehensively summarizes the latest progress made in the above-mentioned areas and also provides commentary on the analyses of results, rationale for observed activity and mechanisms, etc. It also discusses future aspects of this work.

10aBiomass conversion10acarbohydrates10acellulose10afurans10afurfural10ahemicelluloses10aHMF10asolid acid catalyst1 aBhaumik, Prasenjit1 aDhepe, Paresh, Laxmikant uhttps://library.ncl.res.in/content/solid-acid-catalyzed-synthesis-furans-carbohydrates-002484nas a2200241 4500008004100000022001400041245008300055210006900138260000800207300001400215490000700229520167000236653001901906653002501925653002301950653003401973653002502007653003302032100002202065700001102087700003002098856011402128 2020 eng d a2155-543500aTiO2-based water-tolerant acid catalysis for biomass-based fuels and chemicals0 aTiO2based watertolerant acid catalysis for biomassbased fuels an cAUG a9555-95840 v103 a

Solid acid catalysts alone or in combination with redox metals play a pivotal role in biomass valorization to obtain alternative fuels and chemicals. In acid-catalyzed biomass conversions, water is a key reagent/byproduct that can induce leaching/poisoning of catalyst's acid species, a major problem toward catalyst recyclability and product purification. Thus, developing efficient water-tolerant solid acid catalysts is vital for viable biomass valorization. TiO2 is considered to be a promising water-tolerant solid acid catalyst for biomass conversions because of the presence of coordinatively unsaturated Ti4+ sites, which are robust and less prone to leaching in the aqueous medium. Besides, the synergistic combination of TiO2 with redox metals (Ru, Pd, Ni, Cu, etc.) provides abundant bifunctional acid-redox sites, which exhibit a favorable catalytic role in the deoxygenation of biomass molecules to practically useful hydrocarbons. Therefore, this review provides an overview of recent progress toward TiO2-based water-tolerant acid catalysis for biomass conversion, with a focus on hydrothermal stability of TiO2, its acidity, and catalysts' synthesis methods. Various biomass conversions over TiO2-based catalysts, where water-tolerant acid sites or acid-redox dual sites show a significant catalytic effect, were discussed. Structure-activity relationships based on water-tolerant Lewis acidity of TiO2 were emphasized. We believe that this review will provide valuable information for developing efficient water-tolerant solid acid catalysts not only for biomass valorization but also for other challenging reactions in the aqueous medium.

10aAcid catalysis10aacid-redox catalysis10aBiomass conversion10arenewable fuels and chemicals10aTiO2-based catalysts10awater-tolerant Lewis acidity1 aSudarsanam, Putla1 aLi, Hu1 aSagar, Tatiparthi, Vikram uhttps://library.ncl.res.in/content/tio2-based-water-tolerant-acid-catalysis-biomass-based-fuels-and-chemicals01422nas a2200289 4500008004100000022001400041245010600055210006900161260000800230300001100238490000700249520048600256653002300742653002100765653001900786653002300805100002000828700002200848700002400870700002400894700002000918700000500938700001600943700002300959700002100982856012901003 2021 eng d a0019-452200aHydrogenolysis of benzofuran using aqueous ethanol solution over graphite-supported platinum catalyst0 aHydrogenolysis of benzofuran using aqueous ethanol solution over cFEB a1000210 v983 aGraphite-supported platinum catalysts (Pt/G) were highly active for the hydrogenolysis of benzofuran to o-ethylphenol in aqueous ethanol solution at 523 K without using any external hydrogen gas. The hydrogenolysis activities and selectivity to o-ethylphenol in ethanol solution over Pt/G were higher than those with a conventional method using externally supplied hydrogen gas. Both water and ethanol were indispensable for the hydrogenolysis in aqueous ethanol solution at 523 K.10aBiomass conversion10aGraphite support10aHydrogenolysis10aplatinum catalysts1 aHiraishi, Yushi1 aMinakawa, Naohiro1 aTaniguchi, Kenkichi1 aNagasawa, Yoshiyuki1 aNanao, Hidetaka1 a1 aSato, Osamu1 aYamaguchi, Aritomo1 aShirai, Masayuki uhttps://library.ncl.res.in/content/hydrogenolysis-benzofuran-using-aqueous-ethanol-solution-over-graphite-supported-platinum01904nas a2200277 4500008004100000022001400041245011700055210006900172260000900241300001100250490000800261520097300269653002301242653001501265653001901280653001201299653002901311653001801340653003901358100002101397700002101418700001901439700002001458700002101478856012701499 2023 eng d a0926-860X00aPromoting effect of titanium on C-O hydrogenolysis of erythritol to 1,4-butanediol over Pt/W/Ti-SBA-15 catalysts0 aPromoting effect of titanium on CO hydrogenolysis of erythritol  cSEP  a1194250 v6663 a

The C-O hydrogenolysis of erythritol was investigated using Pt/W/Ti-SBA-15 catalysts (4 wt% Pt, 1 wt% W and Si/Ti molar ratio = 50, 33, 20 and 10). Ti-incorporation enhanced the hydrogenolysis activity and the yield of 1,4-butanediol (1,4-BDO). A catalyst with Si/Ti = 20 afforded erythritol conversion of 94 mol% with 1,4-BDO yield of 32.6 mol% and total BDOs yield of 51.7 mol% at 190 degrees C, 50 bar H2 and 12 h. For the catalyst with no titanium (Pt/W/SBA-15), a double the time was required to achieve such yield. There observed electronic connectivity amongst Ti, Pt and W. For the catalyst with Si/Ti = 20, a greater amount of interfacial Pt-O-W(Ti) sites with Pt in + 2 oxidation state was present. The enhanced catalytic performance of these catalysts was corresponded to dispersed Pt (that facilitate hydrogen activation and spillover) and acidic interfacial Pt-O-W sites (that promote the adsorption and hydrogenolysis of erythritol to diols).

10aBiomass conversion10aErythritol10aHydrogenolysis10aPolyols10aPromotional effect of Ti10aTerminal diol10aTi-SBA-15-supported Pt/W catalysts1 aBhowmik, Susmita1 aAkula, Venugopal1 aSethia, Govind1 aMarimuthu, Banu1 aDarbha, Srinivas uhttps://library.ncl.res.in/content/promoting-effect-titanium-c-o-hydrogenolysis-erythritol-14-butanediol-over-ptwti-sba-1502710nas a2200229 4500008004100000022001400041245010600055210006900161260000900230300001600239490000700255520191300262653002502175653002302200653001902223653002702242653001402269653002802283100002002311700002202331856012702353 2023 eng d a1944-824400aSelective and robust Ru catalyst for the aqueous phase aerobic oxidation of furfural to 2-furoic acid0 aSelective and robust Ru catalyst for the aqueous phase aerobic o cSEP  a47004-470150 v153 a

Synthesis of 2-furoic acid (FURA) via oxidation of furfural (FAL) is vital in evolving the biorefinery concept as FURA has numerous important applications in the pharmaceuticals and optic areas. Though few works on this reaction are done, those are marred with shortcomings such as the nonrecyclability of catalyst, dilute solutions, lower yields, or use of H2O2 as an oxidizing agent. Herein, we report catalytic aqueous phase oxidation of FAL to FURA using molecular oxygen as an oxidizing agent. For the synthesis of FURA, various catalysts with a combination of metal (Pt, Pd, Ru) and supports (carbon, Al2O3) were prepared and characterized by multiple techniques (X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS)). Oxidation of FAL carried out over 5 wt % Ru/C catalyst in the presence of Na2CO3 yielded 83% of FURA at 120 degrees C and 15 bar oxygen pressure. The catalyst could show potential for reusability as similar activity was achieved after subjecting the spent catalyst to mild reduction treatment (150 degrees C). Studies on the effects of temperature, pressure, and time could help accomplish enhanced yields of FURA. Additionally, learning about the effect of base (weak/strong/solid) revealed that due to the weak basicity of Na2CO3, higher yields could be achieved by maintaining approximately a pH of 11, which is optimal for suppressing side reactions. Under the given conditions, FURA is stable (>90%) and also adsorption studies divulge that it is immediately removed from the catalyst surface, and hence higher yields could be achieved in our catalytic system. Using the initial rates methodology, an activation energy of 21.91 kJ mol(-1) was derived and also a high turn over frequency (TOF) (85.9 h(-1)) was observed under optimized conditions.

10a2-furoic acid (FURA)10aBiomass conversion10afurfural (FAL)10aheterogeneous catalyst10aOxidation10aruthenium on carbon etc1 aLokhande, Priya1 aDhepe, Paresh, L. uhttps://library.ncl.res.in/content/selective-and-robust-ru-catalyst-aqueous-phase-aerobic-oxidation-furfural-2-furoic-acid01915nas a2200217 4500008004100000022001400041245013500055210006900190260000800259490000700267520113100274653002301405653002701428653002101455653002301476653001601499100001701515700001801532700001801550856012901568 2025 eng d a1867-388000aSelective hydrogenation of furfural to furfuryl alcohol over Pd supported on ternary oxide in aqueous medium under mild conditions0 aSelective hydrogenation of furfural to furfuryl alcohol over Pd  cAUG0 v173 a

We report palladium (Pd) supported on a mixed CuO/ZnO/Al2O3 catalyst for the synthesis of furfuryl alcohol (FA) from furfural (FF) using hydrogen under near atmospheric pressure (balloon pressure) conditions. A systematic study of various metal oxide combinations revealed that the best support for Pd nanoparticles is a CuO/ZnO/Al2O3 mixed system, which results in excellent catalytic performance. A series of control experiments highlighted the essential role of mixed Cu-Zn-Al oxide support in facilitating the adsorption and activation of FF. Our results demonstrate that under optimal conditions (40 degrees C, balloon pressure H2), the catalyst yields FF conversion exceeding 98%, with remarkable selectivity for FA reaching up to 99% with water as solvent. The catalyst exhibited almost comparable activity up to three catalytic cycles without extra catalyst treatment or reactivation with negligible Pd leaching. These findings shed insight into the design of mixed metal oxide-based support for active metal interactions in optimizing catalytic performance in furfural hydrogenation under mild conditions.

10aBiomass conversion10aFurfural hydrogenation10aFurfuryl alcohol10amixed metal oxides10aPd catalyst1 aNehra, Pooja1 aBetsy, K., J.1 aVinod, C., P. uhttps://library.ncl.res.in/content/selective-hydrogenation-furfural-furfuryl-alcohol-over-pd-supported-ternary-oxide-aqueous02206nas a2200241 4500008004100000022001400041245011400055210006900169260000800238300001600246490000700262520137500269653000601644653001801650653002301668653002501691653001801716100003201734700002501766700002201791700002001813856013101833 2025 eng d a2190-681500aTowards efficient conversion of sucrose to 1,2-propanediol selectively over Cu-La on activated carbon support0 aTowards efficient conversion of sucrose to 12propanediol selecti cNOV a29241-292570 v153 a

In this study, we investigated the conversion of sucrose to 1,2-propanediol (1,2-PDO) using various Cu-La metals supported on activated carbon (AC), a versatile support known for its hydrophobicity and high surface area. Among the catalysts tested, 6% Cu-20% La/AC demonstrated the highest activity, achieving a 72% yield of 1,2-PDO under optimal reaction conditions of 200 degrees C, 40 bar H2, and 6-h reaction time. Comparative studies using cellulose, sucrose, glucose, and fructose as substrates identified sucrose as the most favorable feedstock for 1,2-PDO production. Detailed catalyst characterization (XRD, TEM, FE-SEM, TPR, TPD, XPS) revealed that the high dispersion, presence of metallic copper, and synergy between Cu and La, along with the presence of optimal acidic and basic sites, were responsible for the catalyst's high selectivity of 1,2-PDO. Additionally, the effect of different supports, including HY, NaY, HZSM-5, NaZSM-5, gamma-Al2O3, and AC, on sucrose conversion was examined, with AC showing superior performance. The catalyst's reusability was also assessed.Graphical abstractInvestigation of Cu-La metals supported on activated carbon for the catalytic conversion of sucrose to 1,2-propanediol, with an emphasis on choice of support, feedstock selection, catalyst performance, and stability under optimized reaction conditions.

10a110a2-Propanediol10aBiomass conversion10aBiomass-to-chemicals10aHydrogenation1 aAnilan, Anusree, Elavanapar1 aSreekantan, Sreejith1 aRacha, Arundhathi1 aMarimuthu, Banu uhttps://library.ncl.res.in/content/towards-efficient-conversion-sucrose-12-propanediol-selectively-over-cu-la-activated-carbon