Stabilized Ni-based catalysts for bio-oil hydrotreatment: Reactivity studies using guaiacol

Mono-, bi-, and tri-metallic Ni-based catalysts for the catalytic hydrotreatment of pyrolysis liquids

“…A second broad peak extending up to 700°С is associated with hardly reducible nickel silicates. For the Ni-Mo/SiO 2 -Al 2 O 3 catalyst, a dominant hydrogen consumption peak centered at 550°C is visible, which is typical for Mo-containing Ni-based sol-gel catalysts [30] . The small peak at around 410°C on the left shoulder of the dominant peak is ascribed to the reduction of weakly bound well-crystallized NiO species.…”

“…As for the bi-metallic Ni-Cu catalyst, the reflections of metallic nickel are somewhat shifted towards lower 2θ angles in comparison to the monometallic Ni catalyst and literature data [PDF no. 040850], which is associated with the formation of NiMo solid solutions [30]. Table 3 summarizes the XRD data for the oxidized and reduced catalysts, including phase compositions, the mean sizes of the coherent-scattering domain (CSD) of the Nicontaining species as calculated using the Scherrer equation [41], and lattice parameters for metallic Ni particles.…”

“…The catalysts were prepared using a sol-gel method according to a procedure reported by Bykova et al [29][30][31][32]. The amounts of active metals, supports, and activation parameters are summarized in Table 2.…”

Green catalytic valorization of hardwood biomass into valuable chemicals with the use of solid catalysts

“…Some characteristics of used catalysts are given in Table 3. 389 390 Bykova et al 2014). In the previous paper (Sharypov 393 et al 2015) the composition of liquid products of acetone-lignin conversion over NiCu/SiO 2 394 catalysts in supercritical butanol at 300 °C and pressure 2.4-5.0 MPa was studied by GC-MS 395 method.…”

Kinetic study of the conversion of 2-methoxyphenol over supported Re catalysts: Sulfide and oxide state

“…Pyrolysis of lignocellulosic biomass leads to compounds which have the potential to constitute an alternative source of fuel (bio-oil) and value-added chemicals [1][2][3][4]. Valorization of biomass is based on the production of chemicals like phenols or aromatics (BTX: benzene, toluene, xylene) from the lignin polyphenolic structure [5].…”