Catalytic Conversion of Biomass into Hydrocarbons over Noble‐Metal‐Free VO‐Substituted Potassium Salt of Phosphotungstic Acid

Abstract

Bio-fuels emerge as a promising candidate for a sustainable and cheap energy source that can replace diminishing fossil fuels. Among various methods used for the production of biofuel, catalytic hydrodeoxygenation (HDO) is one of the most efficient route due to high conversion efficiency, easy handling and flexibility of using raw biomass. In this context, we present the use of noble-metal-free oxo-vanadium-substituted potassium salt of phosphotungstic acid as a catalyst for HDO of pine sawdust into hydrocarbons and valuable chemicals with a high carbon yield (73.5%) and excellent conversion efficiency (86.2%). The high Brønsted acidity of phosphotungstic acid greatly favors deoxygenation reactions of lignocellulosic com-ponents. Moreover, the synergistic effect between kegginanion, potassium and vanadium entities supports fast multielectron redox transformations and much improves thermal stability. The cellulosic components are selectively converted into pentanes and hexanes. The lignin fraction of biomass is converted into phenolic compounds. It is worth mentioning that raw biomass is directly utilized as obtained without pretreatment, separation and hydrolysis processes in comparison with the existing approaches, thus saving tremendous amount of energy and reducing the cost for large scale production.[a] Dr.

Silver Nanoparticles Formation by Nanosecond Pulsed Laser Irradiation in an Aqueous Solution of Silver Nitrate; Effect of Sodium bis (2-ethyl hexyl) Sulfosuccinate

“…Moreover, we have been able to explore the NP formation process. We have reported this significant study in our previous research work with Sodium Dodecyl Sulphate (SDS) as an additive [39][40][41]. Herein, we have investigated how Sodium bis (2-ethyl hexyl) sulfosuccinate (AOT) influences the formation of silver np by changing a standard AOT concentration and observed the formation of nanocubes (NCs) without the presence of any additives; however, Stable, unified Nanospheres (NSs) were produced with a critical micellar concentration (CMC) of AOT even ten times lower.…”

Phosphotungstic acid‐Titania loaded polyaniline nanocomposite as efficient methanol electro‐oxidation catalyst in fuel cells

“…The specific interaction of organicinorganic electrocatalyst between the anionic charge of PTA and cationic charge of conducting polymer might have a significant effect on fuel cell performance of MOR. 8,22,[25][26][27][28][29] In this specific area of research, one of the significant challenges in developing an economically non-noble metalbased anode catalyst for methanol oxidation. Therefore, it could be a better alternative system for the high-priced platinum-based catalyst.…”

“…The Keggin type PTA (PANI, PDPA, PDMA, and so on) doped with conducting polymer matrix due to the synergistic interaction exhibited excellent electro‐catalytic activity. The specific interaction of organic‐inorganic electrocatalyst between the anionic charge of PTA and cationic charge of conducting polymer might have a significant effect on fuel cell performance of MOR 8,22,25‐29 …”