Preparation of Hydrocarbon Rich Biofuel from Cracking of Waste Cooking Oil Catalyzed by Basic Mesoporous Molecular Sieve Me-KIT-6

Bacic mesoporous molecular sieve Me-KIT-6 (Me = K, Ca, Mg, Ba) was prepared by hydrothermal synthesis through doping basic metal elements, and was used to the cracking reaction of waste cooking oil to produce biofuel. The synthesized molecular sieves were characterized by XRD, N2 adsorption/desorption, TEM and CO2- TPD. The effects of the structure and alkalinity of molecular sieves on the activity and selectivity of catalysts were studied. It is found that the three-dimensional cubic mesoporous structure and high alkali content of molecular sieves can improve the catalytic activity and selectivity, and greatly improve the quality of biofuels. The results show that Mg-KIT-6 mesoporous molecular sieve with n(Mg): n(ethyl orthosilicate) = 1:30 has better catalytic performance. The yield of liquid product can reach 62.7%, of which the content of hydrocarbons is the highest, up to 75.74%. The distribution of liquid biofuels is also very concentrated, mainlyC14-C18 hydrocarbons. The catalyst also has excellent catalytic stability.