Oxygen carrier for preparing synthesis gas by catalytic partial oxidation of methane

Abstract

The invention discloses a cerium-iron-zirconium based composite oxygen carrier material with Al2O3, MgO and SiO2 as carriers, which is used for transmission of partial oxygen in a partial oxidation process. In the invention, three common cheap oxides are used as carriers, cerium-iron-zirconium of certain proportion and the carriers are mixed with a coprecipitation method or a sol-gel method so as to prepare the cerium-iron-zirconium based composite metallic oxide carrier with different carriers. The carrier is beneficial to improvement of oxygen storage capacity and cycle performance of the oxygen carrier, can improve the combustion efficiency of fuels at the same time of obviously reducing the cost, achieves the purpose of modification, and is easy to use in amplified production, wherein MgO is an alkaline oxide, Al2O3 is a neutral oxide and SiO2 is an acidic oxide.

Description

Oxygen carrier for catalytic partial oxidation of methane to synthesis gas technical field The invention relates to an oxygen carrier used for catalytic partial oxidation of methane to produce synthesis gas, which belongs to the field of energy efficient utilization. Background technique Direct partial oxidation of methane to synthesis gas by using lattice oxygen in solid oxygen carrier is a new method emerging in the field of natural gas application in recent years. The reaction is a gas-solid reaction. The whole process can be divided into two processes, which can be carried out in two connected reactors respectively. The first process takes place in the first reactor, called the partial oxidation chamber, in which lattice oxygen in solid oxygen carriers partially oxidizes methane to produce carbon monoxide and hydrogen, while oxygen carriers in higher valence states are reduced into a low-priced state. The second process is the oxygen carrier regeneration process, whi...

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Problems solved by technology

Through experimental research, the applicant of this patent has previously determined a composite oxygen carrier for the catalytic partial oxidation of methane to synthesis gas. A certain ratio of cerium, iron and zirconium metal composite oxides has excellent performance and excellent performance in the catalytic partial oxidation of methane. Good thermal stability, but simply using it as a catalyst is expensive and costly, and it is unrealistic in scaled-up industrial production

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