02206nas a2200205 4500008004100000022001400041245011300055210006900168260000800237300001400245490000700259520151000266100001701776700002201793700001401815700001601829700001101845700001501856856012901871 2020 eng d a1463-926200aFunctionalized magnetic nanosized materials for efficient biodiesel synthesis via acid-base/enzyme catalysis0 aFunctionalized magnetic nanosized materials for efficient biodie cMAY a2977-30120 v223 a

According to the principles of green chemistry, the rapid recovery and reuse of catalysts after a catalytic reaction are important factors to realize the sustainable management of chemical production processes. The functionalization of magnetic nanoparticles is the basis for the efficient separation of heterogeneous catalysts from the reaction system by using the magnetic separation technology as well as for effectively bridging heterogeneous and homogeneous catalytic processes. This can considerably improve the production efficiency and reduce energy consumption as well. Owing to important applications as a potential biofuel or fuel additive, the synthesis of biodiesel mainly from low-cost biomass feedstocks has received considerable attention in the current biorefinery research. A simple synthesis process coupled with the application of functionalized magnetic catalysts can remarkably reduce the production cost and minimize waste generation, thereby promoting the potential development of green catalytic processes for the large-scale synthesis of biodiesel. In this review, the preparation methods, structural and performance control, and protection and functionalization of magnetic nanoparticles as well as the consequent catalytic effects in the synthesis of biodiesel (mainly long-chain fatty acid methyl esters) have been reported. In addition, various representative reaction mechanisms are discussed, emphasizing the existing challenges and prospects of industrialization.

1 aWang, Anping1 aSudarsanam, Putla1 aXu, Yufei1 aZhang, Heng1 aLi, Hu1 aYang, Song uhttps://library.ncl.res.in/content/functionalized-magnetic-nanosized-materials-efficient-biodiesel-synthesis-acid-baseenzyme01674nas a2200217 4500008004100000022001400041245007800055210006900133260000800202300001400210490000700224520100000231100001601231700001901247700001601266700001801282700001101300700002201311700001501333856010801348 2021 eng d a1463-926200aRoom-temperature quasi-catalytic hydrogen generation from waste and water0 aRoomtemperature quasicatalytic hydrogen generation from waste an cOCT a7528-75330 v233 aA solvation-driven catalyst-free H-2 generation system from water and various waste hydrosilanes at room temperature was developed, with good to quantitative H-2 yields in minutes. Using a green solvent is found to promote the strong coordination of proton carriers with hydrosilane to liberate H-2 based on molecular dynamics simulations. Theoretical calculations clarify that OH(-)in situ generated from H2O enabled by solvation is favorable for activating the Si-H species of hydrosilane, and the in situ formed Si-OH interacts more effectively with the adjacent remaining Si-H, both contributing to the overall enhanced H-2 generation. Moreover, the overall life-cycle impacts of the developed system are less than those of industrial H-2 production processes, especially in ozone layer depletion and abiotic depletion resources - fossil fuels. This protocol realizes the potential of efficiently producing H-2 from waste and water, and opens a new avenue to alleviate petroleum consumption.1 aWu, Hongguo1 aZhang, Li-Long1 aWang, Junqi1 aJiang, Yiyuan1 aLi, Hu1 aSudarsanam, Putla1 aYang, Song uhttps://library.ncl.res.in/content/room-temperature-quasi-catalytic-hydrogen-generation-waste-and-water02065nas a2200265 4500008004100000245011200041210006900153260000800222300001100230490000600241520121800247653002601465653001401491653002801505653001801533653001501551100001501566700002201581700001501603700001701618700001601635700001101651700001501662856012201677 2021 eng d00aSulfonic acid-functionalized heterogeneous catalytic materials for efficient biodiesel production: a review0 aSulfonic acidfunctionalized heterogeneous catalytic materials fo cFEB a1047190 v93 a

The development of social productive forces leads to the increasing consumption of fossil fuels. However, the burning of traditional fossil fuels releases huge amounts of carbon emissions into the atmosphere, resulting in drastically increased global surface temperatures, and hence, global warming and abnormal climate change. Biodiesel, which can be produced by (trans)esterification of bio-oils using solid acid catalysts, is recognized as renewable and clean energy, alternative to fossil-derived diesel, and it can meet society's requirements. This review describes the catalytic conversion of bio-derived oils into biodiesel using various sulfonic acid-functionalized heterogeneous catalytic materials that show higher catalytic efficiency and superior recyclability. Besides, various methods of biodiesel preparation and the appropriate design and preparation of robust and efficient catalytic materials for biodiesel production were provided. Finally, the mechanisms of different catalytic esterification and transesterification reactions for biodiesel synthesis, the relevant reaction kinetic models, and techno-economic analysis of biodiesel production were critically discussed in this review.

10a(Trans)esterification10aBiodiesel10aheterogeneous catalysis10akinetic study10asolid acid1 aTan, Xiang1 aSudarsanam, Putla1 aTan, Jinyu1 aWang, Anping1 aZhang, Heng1 aLi, Hu1 aYang, Song uhttps://library.ncl.res.in/content/sulfonic-acid-functionalized-heterogeneous-catalytic-materials-efficient-biodiesel01902nas a2200253 4500008004100000022001400041245009800055210006900153260000800222300001100230490000800241520108800249653002001337653001601357653001701373653002601390653002001416100001601436700001101452700001801463700002201481700001501503856013001518 2022 eng d a0016-236100aProtophilic solvent-impelled quasi-catalytic CO2 valorization to formic acid and N-formamides0 aProtophilic solventimpelled quasicatalytic CO2 valorization to f cOCT a1250740 v3263 a

As a low-price and luxuriant C1 sustainable resource, CO2 has the privilege of synthesizing hydrogen carriers and valuable chemicals. However, expensive metallic and organic catalysts are often indispensable for going on wheels of the relevant reaction processes. In this work, a protophilic solvent-impelled quasi-catalytic system was developed for efficient synthesis of formic acid and various N-formamides with high yields of 76-94% via reductive CO2 functionalization under mild reaction conditions (50 ?). Direct activation of the liquid hydrosilane toward the reduction of CO2 enabled by DMSO with optimum basicity/protophilicity is the predominant reaction route among the examined interaction models, while carbonic acid potentially derived from excessive CO2 and residual water inhibits the reaction, as explicitly disclosed by theoretical calculations and isotope labeling experiments. In addition, the in situ formed O-formyl species is conductive to the cascade CO2 reduction steps, which remarkably facilitated the overall quasi-catalytic upgrading process.

10aCO2 utilization10aFormic acid10aGreen energy10aNitrogenous chemicals10aQuasi-catalysis1 aWu, Hongguo1 aLi, Hu1 aZhao, Wenfeng1 aSudarsanam, Putla1 aYang, Song uhttps://library.ncl.res.in/content/protophilic-solvent-impelled-quasi-catalytic-co2-valorization-formic-acid-and-n-formamides