Catalytic hydrogenolysis of plastic to liquid hydrocarbons over a nickel-based catalyst

Catalytic hydroconversion processes for upcycling plastic waste to fuels and chemicals

“…52 Therefore, development of single-atom and subnanometric noble metal catalysts as well as alloy catalysts with low metal loading is encouraged for practical applications. Although some non-noble catalysts, such as Ni–SiO 2 61 and Ni/HZSM-5, 37 have been prepared for the hydrogenolysis and hydrocracking of polyolefins, the performances are still inferior to noble-metal catalysts. Based on the site requirements for C–C, C–O and C–N bond activation, selecting the optimal combination of non-noble metals, promoters, and supports, and carefully modulating the catalyst specific structure could be the key criteria for the development of non-noble metal-based hydroconversion catalysts with high efficiency.…”

“…Besides heterogeneous Ru- and Pt- based catalysts for the hydrogenolysis of POs, other supported non-noble metal catalysts, such as Zr-, 60 Ni-, 61 Co- 62 and Nb- 63 based catalysts, have been demonstrated to be effective for the transformation of POs into valuable alkanes.…”

“…To further improve the catalyst activity, the same group tuned the catalyst's electronic properties by modifying the synthesis using ammonia. 55 60 Ni-, 61 Co- 62 and Nb-63 based catalysts, have been demonstrated to be effective for the transformation of POs into valuable alkanes.…”

“…Recently, Wang and his coworkers demonstrated a Ni/SiO 2 catalyst for the hydrogenolysis of PE into gasoline and diesel range hydrocarbons (C 4 -C 22 ) with a yield of 81.2% at 280 °C, 3 MPa H 2 for 8 h of reaction. 61 Two different preparation methods including the impregnation method and deposition-precipitation method were investigated. Based on the characterization, the Ni/SiO 2 catalyst prepared by the deposition-precipitation method possesses smaller nickel particles (∼0.87 nm) and strong metal-support interaction, due to the formation of nickel phyllosilicate, which renders its high hydrogenolysis activity and low selectivity to light alkanes.…”

Structure–Property Relationships for Nickel Aluminate Catalysts in Polyethylene Hydrogenolysis with Low Methane Selectivity

“…Numerous catalytic and noncatalytic methodologies have recently emerged to deconstruct POs. Hydrogenolysis, − hydrocracking, − and alkane metathesis , were demonstrated to convert POs to fuel, wax, and lubricant-ranged hydrocarbons, whereas acid cracking and pyrolysis − produce a mixture of aliphatic, olefinic, and aromatic products. PO hydrogenolysis is attractive due to its mild reaction temperatures and tunable product selectivity.…”