Selectivity Control of C-O Bond Cleavage for Catalytic Biomass Valorization

Abstract

Increasing fossil fuels consumption and global warming have driven the global revolution towards renewable energy sources. Lignocellulosic biomass is the main source of renewable carbon-based fuels. The abundant intermolecular linkages and high oxygen content between cellulose, hemicellulose, and lignin limit the use of traditional fuels. Therefore, it is a promising strategy to break the above linkages and remove oxygen by selective catalytic cracking of C–O bond to further transform the main components of biomass into small molecular products. This mini-review discusses the significance of selectivity control in C–O bond cleavage with well-tailored catalytic systems or strategies for furnishing biofuels and value-added chemicals of high efficiency from lignocellulosic biomass. The current challenges and future opportunities of converting lignocellulose biomass into high-value chemicals are also summarized and analyzed.

Upcycling of the Used Cigarette Butt Filters through Pyrolysis Process: Detailed Kinetic Mechanism with Bio-Char Characterization

“…This can be related to the random dissociation of the bonds in the cellulosic chains along a fiber axis—1,4-β-glycosidic linkages. Further, a very important fact that should be emphasized is the following: the catalytic reaction step C → D represents the hydrolytic decomposition of cellulose by the catalytic cleavage of the glycosidic bonds because the glycosidic linkage in the cellulose molecules is very sensitive to acid-catalyzed hydrolysis [ 94 ]. Namely, the degree of this sensitivity varies according to accessibility (amorphous or crystalline region), type of acid and concentration, and also temperature.…”

Combustion Behavior of Cellulose Ester Fibrous Bundles from Used Cigarette Filters: Kinetic Analysis Study

“…However, since it is a complex reaction mechanism that can proceed through several elementary steps, their number and order cannot be determined by applying the isoconversional kinetic analysis. This is supported by the fact that the transglycosylation mechanism can be included [69], occurring in noncatalytic manner, with the lower activation energy of approximately 209 kJ mol -1 (this value also belongs to the Ea values present in Region B at α ≈ 0.45 (Figure 6a)), which is in good agreement for αcyclodextrin conversion at the higher temperatures [67]. The answer to these questions (in the form of "confirm or it is opposite") can be given by model-based kinetic analysis, which communicates information about the contribution of the individual reaction steps to the entire process and gives us reliable kinetic parameter magnitude domains within an individual reaction channel.…”

Lignocellulosic Biomass in Nanopesticides: A Path toward Sustainable Agriculture

“…Biomass is often considered waste; however, labeling lignocellulosic material as “waste” is deemed inappropriate due to its potential application . Biomass plays a crucial role as a renewable-energy source in the production of high-efficiency chemicals and fuels. , Among various biomass resources are wood, agricultural residues, forestry residues, food waste, algae, vegetable oils, and others. , It is essential to emphasize the significance of lignin, a key component of lignocellulose, in the efficient harnessing of this valuable renewable-energy source.…”