Ni/Beta双位点协同催化聚烯烃精准裂解OA

Objective Highly active,low-cost,and resource-abundant non-precious metal catalysts have been developed for the efficient recovery of low-density polyethylene(LDPE).Method The study examined the effects of nickel species loading,types of zeolites and their silicon-to-aluminum ratios,reaction temperature,initial hydrogen pressure,and reaction time on the hydrocracking performance of LDPE.Result When Ni/Beta was used as the catalyst for the LDPE hydrocracking under the conditions of 250 ℃,initial hydrogen pressure of 3 MPa,and reaction time of 1 hour,the conversion rate of LDPE reached up to 96.8 wt％,and the liquid alkanes yield achieved 72.0 wt％.Conclusion The Ni/Beta catalyst has demonstrated efficient degradation of polyolefins under mild conditions,confirming that the use of low-cost nickel species in conjunction with acidic zeolites can effectively facilitate the recycling of polyolefin waste.This approach shows promising industrial prospects.