Method for preparing monolithic porous carbon with basic magnesium carbonate for catalyzing phenolic aldehyde to be polymerized

Abstract

The invention discloses a method for preparing a monolithic porous carbon with basic magnesium carbonate for catalyzing phenolic aldehyde to be polymerized, which includes the following steps: (1) a saturated basic magnesium carbonate solution is prepared; (2) resorcinol and formaldehyde are sequentially added into the saturated basic magnesium carbonate solution sealed after being stirred, and after four hours of reaction under 70 DEG C to 100 DEG C, a wet gel is obtained; (3) after being dried, the wet gel obtained in step (2) is put into a tubular carbonization furnace, reacts under the protection of inert gas for two hours after being heated to 650 DEG C to 1050 DEG C, and is then naturally cooled to room temperature, and thereby the monolithic porous carbon is obtained. With resorcinol and formaldehyde as carbon soruces, the method utilizes the catalytic effect and easy decomposition property of basic magnesium carbonate to prepare the monolithic porous carbon by rapid gelation and carbonization control, and the mechanical strength reaches 9.4MPa. The method has high gelation speed, the specific surface area of the prepared product is large, and the CO2 equilibrium absorption capacity is high.

Description

technical field

[0001] The invention belongs to the field of carbon material preparation, and in particular relates to a method for preparing monolithic porous carbon by catalyzing phenolic polymerization with basic magnesium carbonate. Background technique

[0002] As one of the most important greenhouse gases, CO in the atmosphere 2 The increasing content of cyanide has become a major environmental issue of widespread concern to mankind. At the same time, CO 2 It is also an important industrial raw material, and has many applications in the fields of inorganic chemical industry and organic chemical industry. Therefore, using appropriate methods to achieve CO 2 It is very necessary to capture and use them rationally. Adsorption is an important CO 2 capture method. The method has low energy consumption and large adsorption capacity, and is widely used in the separation and purification of flue gas and natural gas. Common adsorbents include molecular sieves, porous sil...