沸石基油砂沥青改质催化剂的性能研究

研究和开发高效减黏、抗硫氮和重金属的水热催化裂化改质催化剂是油砂沥青资源利用技术的关键，以天然斜发沸石为基质制备氢型沸石载体和微孔镍基沸石催化剂，考察其应用于模型化合物水热裂化的性能和对加拿大麦肯河SAGD油砂沥青减黏改质的效果。结果表明：在正十六烷为模型化合物的水热裂化过程中，微孔镍基沸石催化剂表现出良好的催化裂化性能和优良的水热稳定性；在油砂沥青改质试验中，微孔镍基沸石催化剂能够显著降低油砂的黏度，增产中间馏分油，并在一定程度上降低硫、氮含量，可用于中低温和非临氢条件下的油砂沥青减黏改质。

STUDY ON PERFORMANCE OF CLINOPTILOLITE-BASED CATALYST FOR OIL SAND BITUMEN UPGRADING

Hydrothermal catalytic cracking catalyst with high efficiency of viscosity reduction, sulfur and nitrogen resistance is the key to the utilization technology of oil sand bitumen resource. H-type clinoptilolite carrier and microporous Ni-based catalyst were prepared using natural clinoptilolite. Its performance in hydrothermal cracking of the model compound and in visbreaking and upgrading of SAGD oil sand bitumen in McCann, Canada were investigated. The results showed that the Ni-based clinoptilolite catalyst exhibited good catalytic cracking performance and hydrothermal stability in the process of hydrothermal cracking with n-hexadecane as the model compound. The catalyst could significantly reduce the bitumen viscosity, increase the yield of middle distillate oil, and reduce the sulfur and nitrogen content to a certain extent. It could be used for viscosity reduction and upgrading of oil sand bitumen under medium and low temperature and non-hydrogen conditions.