Porous ceramic-loaded catalyst used for biomass catalytic liquefaction, and preparation method thereof

Abstract

The invention discloses a porous ceramic-loaded catalyst used for biomass catalytic liquefaction, and belongs to the technical field of porous functional ceramic. A natural inorganic catalyst is taken as an active ingredient of the porous ceramic-loaded catalyst, is subjected to smashing, grinding, and screening, and is mixed with a ceramic aggregate, a pore forming agent, and a binder at a mass ratio of 30-40:40-50:5-10:10-15; an obtained mixture is processed so as to obtain a porous ceramic body material; the porous ceramic body material is subjected to drying, sintering, and activation so as to obtain the porous ceramic-loaded catalyst; wherein the active ingredient is one or a combination of a plurality of ingredients selected from dolomite, limestone, diatomite, kaoline, olivine, cordierite, montmorillonite, hydrotalcite, carnallite, beryl, celestite, and gypsum at random, and dolomite and montmorillonite preferably. The porous ceramic prepared via above steps can be taken as a catalyst of biomass pyrolysis liquidation processes and a reactor internal heat carrier at the same time, possesses activity on biomass pyrolysis processes, is capable of increasing bio oil yield, improving bio oil quality, and reducing biomass pyrolysis reaction conditions.

Description

technical field [0001] The invention belongs to the technical field of porous functional ceramics, and relates to a method for preparing a catalyst for pyrolysis of biomass using porous ceramics as a carrier. Background technique [0002] Biomass, usually refers to aquatic plants and terrestrial plants, mainly including crop straw, wood, branches, fallen leaves, aquatic plants, seaweed, as well as kitchen organic matter and animal manure. The total amount of biomass produced by photosynthesis on the earth every year can reach 140-180 billion tons (dry weight). The main components are hydrocarbons, which can be converted into solid, liquid or gaseous fuels through different conversion technologies. Efficient use of. [0003] According to the 2014 National Economic and Social Development Statistical Bulletin of the National Bureau of Statistics, the total national energy consumption in 2014 was 4.26 billion tons of standard coal, a year-on-year increase of 2.2%. Among them, ...

AI Technical Summary

Problems solved by technology

However, the mechanical strength of the above-mentioned natural inorganic materials (hereinafter referred to as natural inorganic catalysts) is generally not high. During the liquefaction process of biomass catalytic pyrolysis, due to the high temperature in the reaction zone and the intense movement of the particles inside the reactor, it is easy to cause the natural inorganic catalysts to break down. Severe wear and tear, even broken, the fine dust formed is easily carried out of the reactor by the fluidizing gas, affecting the multiphase flow in the reactor and the catalytic effect of the catalyst

[0018] Therefore, in view of the lack of natural inorganic catalysts with low mechanical strength, how to develop improved catalysts with high catalytic efficiency, long service life, and low cost has become a key issue that needs to be solved urgently for the large-scale application of biomass catalytic pyrolysis liquefaction technology.