Catalyst for oil hydrogenation to hydrocarbon fuels and its preparation and application

Abstract

The invention relates to a method for preparing a catalyst for hydrogenation of fats and oils to prepare liquid fuels. The specific preparation steps are as follows: first, the roasted ZSM‑22 molecular sieve is mixed with the precursor of the amorphous oxide, extruded, shaped and roasted to form a carrier precursor; the monomer molecules of the polymer are filled in the carrier precursor Then carry out temperature rise treatment to obtain a carrier in which the acid sites of the molecular sieve are partially covered and the pores are partially blocked; the metal active component is loaded on the carrier, and the target catalyst is obtained after drying and reduction. Compared with the catalyst prepared in the prior art, the catalyst prepared by the method of the invention has higher isoparaffin selectivity and yield in the process of oil hydrogenation to liquid fuel.

Description

technical field [0001] The invention belongs to the field of molecular sieve catalysts, in particular to a ZSM-22 molecular sieve-based fuel catalyst for oil hydrogenation to hydrocarbons and a preparation method thereof. Background technique [0002] With the continuous development of economy and society, the reduction of primary energy such as oil and coal has brought about energy shortage. The price of crude oil and coal has been rising in recent years, which has also affected the price of motor fuel. In addition, since petroleum and coal are both carbon-containing resources and contain elements such as nitrogen and sulfur, carbon dioxide and toxic gases that are harmful to the environment will inevitably be produced during their conversion and product use. Based on this, and also due to political and economic factors, some countries have introduced relevant policies to restrict the use of fossil energy products. For example, the European Union launched a carbon tax coll...

AI Technical Summary

Problems solved by technology

[0011] 4. Molecular sieve micropores with suitable depth: The hydroisomerization of linear alkanes is mainly carried out at the molecular sieve micropore openings. If the molecular sieve micropore channels are too deep, the probability of linear alkanes completely or mostly inserting into the micropore channels increases. The desorption is hindered, which increases the probability of cracking at the insertion end, which makes it easy to generate small molecular hydrocarbons, which reduces the selectivity and yield of the target product

Images