Hydrodeoxygenation of Sorbitol into Bio‐Alkanes and ‐Alcohols Over Phosphated Ruthenium Molybdenum Catalysts

Abstract

Biofuels such as renewable alkanes and higher alcohols have drawn considerable interests for the use in internal combustion engines. Especially, higher alcohols could be used as a blending agent for diesel fuels. Herein, carbon supported phosphated ruthenium-molybdenum (RuMoP) catalysts were employed in continuous trickle-bed reactor for converting sorbitol into renewable alkanes and higher alcohols. The results showed that RuMoP on an active carbon (AC) support presented a complete sorbitol conversion and high yields of alkanes and alcohols in gasoline and diesel range. Subsequently, carbon nanotube (CNT) supported RuMoP was prepared and studied in detail for comparison. RuMoP/CNT presented a low CÀC bond cracking property in sorbitol conversion and high selectivity of C6 products in gas-phase (C6 alkane, 74.7 %) and oil-phase (C6 alkane and alcohols, 87.8 %). Finally, detailed characterizations (N 2 -adsorption, XRD, HRTEM, XPS, NH 3 -TPD, Py-IR spectrums, etc.) were performed over relevant catalysts (RuMoP/C and RuMoP/CNT) for correlating their catalytic and physicochemical properties.[a] Dr.

Selective Hydrogenolysis and Hydrogenation of Furfuryl Alcohol in the Aqueous Phase Using Ru–Mn-Based Catalysts

“…Thus, it is the most essential issue to design a multifunctional catalyst that could well coordinate each catalytic site to reduce side reactions. Ru-based catalysts are highly desirable due to their advantages, as we mentioned in our previous publications. − In this work, we further investigated the performance of Ru-based catalysts for aqueous phase conversion of furfural and furfuryl alcohol and the associated reaction mechanisms. First, we have studied the effect of different supports on the catalytic performance and product distribution, whereby the Ru–Mn/CNTs catalyst was screened for further investigation, which included various reaction parameters such as reaction temperature, H 2 pressure, and reaction solvent.…”

Continuous Flow Upgrading of Selected C2–C6Platform Chemicals Derived from Biomass

“…However, higher C5–C6 alkane yields were obtained upon implementation of the former option . Reported catalytic systems were based on Ir, Ni, Ni–Mo, Pd, , Pd–Fe, Pd–Mo, Pt, ,,− Pt–Mo, Pt–Re, Rh–Mo, Ru, , or Ru–Mo ,− supported onto various materials. With regard to catalyst development, the most challenging aspect of the hydrogenolysis reaction is the design of catalytic systems that do not catalyze C–C bonds cleavage to avoid the detrimental formation of lower alkanes and oxygenates.…”

New synthetic approaches to biofuels from lignocellulosic biomass

“…In this respect, Kwon et al [13] demonstrated selective condensation of 2-methylfuran and furfural to C 15 compounds with supported phosphotungstic acid catalysts in a continuous-flow fixed-bed reactor system, where formation of unwanted viscous tetramers (C 20 ) were suppressed. Moreover, Weng et al [14] applied carbon supported phosphated Ru-Mo catalysts in a continuous trickle-bed reactor to convert sorbitol into renewable alkanes and higher alcohols.…”

“…HDO has also been used to convert sorbitol (sugar alcohol derived from glucose) into high-octane gasoline products with research octane number (RON) higher than 100 in ∼70% yield using zirconium phosphate supported Pd-bimetallic catalysts [24]. In contrast, carbon nanotube supported phosphated Ru-Mo catalysts were found to provide low affinity for C-C bond cracking of sorbitol resulting instead in high selectivity of C 6 products (lower gasoline-range) in gas-phase (C 6 alkanes, 74.7%) and liquid-phase (C 6 alkanes and alcohols, 87.8%) [14].…”