Catalyst for reforming methane and carbon dioxide to prepare synthetic gas as well as preparation method and application thereof

Abstract

The invention discloses a catalyst for reforming methane and carbon dioxide to prepare synthetic gas as well as a preparation method and application thereof and belongs to the technical field of preparation of catalysts. The catalyst takes compound active carbon as a carrier, takes nickel and cobalt as active components, and takes iron, potassium, cerium, copper or zinc as a cocatalyst component. The preparation method comprises the following steps: firstly, carbonizing, activating and modifying raw materials including brown coal and mao bamboos to prepare a compound carbon material; then, modifying and roasting the prepared compound active compound under the condition of 0.2MPa-10MPa by adopting an HNO3 solution to obtain a catalyst carrier; loading nickel, cobalt, iron, potassium, cerium, copper and zinc on the carrier with the help of ultrasonic waves through an excessive immersion method; and filtering, drying, roasting and reducing to obtain the catalyst. After modification, loaded active components of the catalyst are uniformly distributed and the activity is relatively high; and the carrier takes the brown coal and the mao bamboos as the raw materials so that the carrier is high in content of active oxygen functional groups, large in specific surface area and low in cost.

Description

technical field [0001] The invention relates to a catalyst for producing synthesis gas by reforming methane and carbon dioxide, a preparation method and application thereof, and belongs to the technical field of catalyst preparation. Background technique [0002] Methane is widely distributed in nature and is the main component of natural gas. It also exists in large quantities in shale gas and combustible ice, and its reserves are abundant. At the same time, methane is also one of the important greenhouse gases. [0003] Carbon dioxide gas is the main cause of the greenhouse effect, but the carbon dioxide emitted by humans into the atmosphere is increasing year by year. How to deal with these carbon dioxide and alleviate the greenhouse effect has become a common challenge for all mankind. [0004] The reforming reaction of methane and carbon dioxide consumes two greenhouse gases, methane and carbon dioxide, and produces synthesis gas H 2 The / CO ratio is low, suitable for...

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Problems solved by technology

[0009] The present invention aims to provide a catalyst for methane carbon dioxide reforming to produce synthesis gas. Aiming at the problems existing in the existing methane carbon dioxide reforming catalysts: complex preparation of the carrier, high cost, easy carbon deposition and poor stability of the catalyst, lignite and Moso bamboo is carbonized, mixed and bonded, carbonized, and activated to make activated carbon, and then under certain conditions, it is activated with 1%-15% nitric acid and 5-15 wt% ammonia water to make a catalyst carrier. Nickel, cobalt, iron, potassium, cerium, copper, and zinc are loaded on the carrier. The catalyst is low in cost, and the active components are evenly distributed on the carrier. It is resistant to carbon deposition, high in activity, and long in life.

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