| abstract |
The invention belongs to the direct preparation of low-carbon olefins from synthesis gas, and in particular relates to a method for directly transforming an LF-type B acid catalyst and synthesis gas into ethylene. The catalyst is a composite catalyst, which is composed of component A and component B by mechanical mixing. The active component of component A is a metal oxide, and component B is a molecular sieve with a MOR structure; the active component in component A is the same as The weight ratio between components B is 0.1-20. The reaction process has high product yield and selectivity, and the selectivity of light olefins can reach 80-90%, wherein the ethylene space-time yield is high, and the selectivity reaches 75-80%, while the by-product methane selectivity is extremely low ( <15%), has a good application prospect. |