Hydroliquefaction of green wastes to produce fuels

Simultaneous Liquefaction and Hydrodeoxygenation of Lignocellulosic Biomass over NiMo/Al2O3, Pd/Al2O3, and Zeolite Y Catalysts in Hydrogen Donor Solvents

“…Our resultsa re in accordance with the work of Wang et al who reported an egligible effect (even with an egative trend) of the elevated H 2 pressure on the gas formation during the sawdust decomposition process in tetralin without any heterogeneouscatalyst. [9] The catalysts tested in this work were clearly much less active for the methane formation reactions. Experiments were conducted in tetralina t 350 8Cf or 60 min under 5MPa of H 2 with ac atalystl oading of 10 wt %w ith regard to the mass of fine beech sawdust.…”

“…However,B euchet et al used am ixture of lignocellulosic wastes and Raney Ni to investigate hydroliquefaction in tetralin under H 2 pressure and proposed as chematic pathway for hydroliquefaction that involves two steps:n on-catalytic solvolysis by thermal degradation of biomass as the first, and the catalytic hydrogenation and HDO enhanced by hydrogen transfer as the second step. [9] In this work, the simultaneousb iomassl iquefaction and hydro-treatment of LC biomass was investigated in hydrogen donor solvents under an inert or H 2 atmosphere in the presence of atypical HDO, hydrogenationo rfluid catalytic cracking (FCC) heterogeneousc atalyst. The influence of the reaction time, temperature, pressure, process gas, catalyst, wood and solventt ype on the yield and composition of products was establisheda nd an ew lumped kinetic model that considers LC biomass liquefaction, decarboxylation, decarbonylation, HDO and char formation was developedb ased on the reaction mechanisms proposed from the experimental results.…”

Cleavage of Covalent Bonds in the Pyrolysis of Lignin, Cellulose, and Hemicellulose

“…20,21 This indicates that, in the presence of a sufficient amount of a hydrogen donor solvent, most of the radicals would be coupled to hydrogen from the donor solvent, which minimizes coupling of the radicals themselves and reduces the number of stable radicals formed and detected by ESR, allowing the determination of the amount of bonds that underwent cleavage by the amount of aromatics formed.…”

Hydro-liquefaction of sawdust and its three components in supercritical ethanol with [BMIM]Cl/NiCl 2 catalyst

“…The Ni/Raney catalyst was utilized in the hydro-liquefaction of D.salina, and the highest bio-oil yield of 72.0% could be achieved [17]. Beauchet et al observed that Nickel Raney catalyst could enhance the green wastes conversion and improve the quality of biocrude [18]. In the work, due to its simple preparation and good dissolution ability for lignocelluloses, the [BMIM] Cl was chose.…”