One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, such as the rate of change in the concentration of reactants or products with time. 10177-29-4, Name is 4-Chloronicotinic acid, formurla is C6H4ClNO2. In a document, author is Luna-Murillo, Beatriz, introducing its new discovery. Category: pyridine-derivatives.
Catalytic Fast Pyrolysis of Biomass: Catalyst Characterization Reveals the Feed-Dependent Deactivation of a Technical ZSM-5-Based Catalyst
Catalyst deactivation due to coking is a major challenge in the catalytic fast pyrolysis (CFP) of biomass. Here, a multitechnique investigation of a technical Al2O3-bound ZSM-5-based extrudate catalyst, used for the CFP of pine wood and cellulose (at a reactor temperature of 500 degrees C), provided insight into the effects of extrusion, the catalytic pyrolysis process, and catalyst regeneration on the catalyst structure. As a result of a reduction in acidity and surface area due to the coking catalyst, the activity dropped drastically with increasing time-on-stream (TOS), as evidenced by a decrease in aromatics yield. Strikingly, confocal fluorescence microscopy at the single-particle level revealed that vapor components derived from whole biomass or just the cellulose component coke differently. While pine-wood-derived species mainly blocked the external area of the catalyst particle, larger carbon deposits were formed inside the catalyst’s micropores with cellulose-derived species. Pyridine FT-IR and solid-state NMR spectroscopy demonstrated irreversible changes after regeneration, likely due to partial dealumination. Taken together with <30 g kg(-1) aromatics yield on a feed basis, the results show a mismatch between biomass pyrolysis vapors and the technical catalyst used due to a complex interplay of mass transfer limitations and CFP chemistry. I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 10177-29-4 help many people in the next few years. Category: pyridine-derivatives.
Reference:
Pyridine – Wikipedia,
,Pyridine | C5H5N – PubChem