Catalyst for preparing heavy hydrocarbon with synthetic gas and its prepn process

Abstract

The catalyst for preparing heavy hydrocarbon with synthetic gas has amorphous SiO2 as carrier, Co as main active component, and small amount of Zr as cocatalyst. Of the catalyst, SiO2 has specific surface area of 150-900 sq m/g, average hole size of 2-100 nm and pore volume of 0.5-1.5 ml/g; Co content is 5-35 wt%; and Zr content is 0.01-5 wt%. The preparation process of the catalyst includes the following steps: 1. soaking SiO2 in Zn containing solution, drying at 273-473 K and baking at 473-1273 K; 2. soaking SiO2 containing Zn in Co containing solution, drying at 273-423 K and baking at 423-1273 K; and 3. treating the catalyst containing H2 in 0.2-20 wt% and inert gas N2, He or Ar at 473-873 K and 0.05-2.00 MPa. The catalyst has low cost, high stability, high C20+ hydrocarbon selectivity and other advantages.

Description

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AI Technical Summary

Benefits of technology

This patented catalytic process uses commercial ammoniacal oxide or other materials called ZrCs instead of expensive raw material like platinum for producing synthetic gases from coal tar distillate fractions containing heavy oils such as diesel oil. By mixing small amounts of these metals together, this new type of catalyst becomes more effective at making certain types of chemical compounds through reactions between them. It also makes it easier than previous methods because they only require one metal atom per molecule compared to traditional processes involving multiple atoms.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the performance of certain types of chemical reactions called Fischer-Thrucksynthesis processes that involve mixing two reactant gases together at specific temperatures under pressure conditions. These techniques are commonly referred to as hydrocrackers because they convert light paraffin fractions into heavier ones while also producing valuable materials like diesels. To improve their effectiveness, researchers focused on developing new catalyst systems containing transition metals instead of Fe(III) which were previously found to lack durability over time due to decomposition caused by acidic components present during storage.

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