Catalyst and treatment method for upgrading tar by using catalyst

Abstract

The invention relates to a catalyst and a method for treating tar by using the catalyst. The catalyst is an alkali metal salt loaded catalyst and is prepared through the following steps: dropwise adding an alkali metal salt solution on a carrier particle to uniformly soak the particle by the solution, drying and roasting the particle, and cooling the roasted particle to obtain the alkali metal salt loaded catalyst. The method for treating the tar comprises the following steps: mixing the tar and small molecule alcohol, carrying out high-temperature gas-phase catalytic conversion treatment, and subjecting the creosote ingredient in the tar and the small molecule alcohol to etherification reaction by using the catalyst provided by the invention to convert the creosote in the tar to aromatic ether. The method is conductive to the increase of the caloricity and oil phase solubility of the tar and the reduction of the acidity and corrosivity of the tar. The catalyst preparation technology and tar treatment technology provided by the invention are simple and efficient, the raw material cost and the running cost are low, and the industrialized production is easily achieved. The raw materials and technological processes for the catalyst preparation and tar treatment are pollution-free and environment-friendly.

Description

technical field [0001] The invention relates to a catalyst and a treatment method for upgrading tar oil by using the catalyst, in particular to a catalyst for etherification reaction of creosote components in tar oil, and the conversion of tar and alcohol to obtain heat value and oil phase Process for tar treatment of heteroether-rich components with increased solubility, reduced acidity and reduced corrosivity. Background technique [0002] Tar is a black or dark brown viscous liquid obtained during the dry distillation of coal or biomass. It has a special odor, is flammable and corrosive, and is a complex mixture of highly aromatic hydrocarbons. Inexpensive source of fuel and valuable chemical resource. However, tar, especially low-temperature pyrolysis tar, is rich in creosote components containing a large number of oxygen atoms, resulting in lower calorific value and higher acidity of tar, which limits its direct application as liquid fuel, so it must be refined to redu...

AI Technical Summary

Problems solved by technology

However, due to defects in the preparation process, the existing catalysts have problems such as low selectivity, low yield, complex preparation process, and high production cost, which are bottleneck factors restricting the industrialization of phenol and alcohol high-temperature gas-phase catalytic conversion to prepare aromatic ethers.

[0006] Catalytic cracking deoxygenation is to selectively catalyze the breakage of oxygen-containing chemical bonds through catalysts under the condition of no external hydrogen introduction, so that it can be released as small molecular oxygen-containing components, thereby achieving the purpose of reducing the content of oxygen atoms in tar. In the laboratory research stage, most of the tested catalysts are molecular sieve catalysts widely used in petrochemical industry. However, from the current results, many problems such as low catalyst activity, short service life, and poor regeneration performance are prominent, and there is still a big gap from practical application.