CN-118416961-B - Method for preparing aviation fuel by using polyacid Cu-BTC supported Pd catalyst

Abstract

The invention discloses a method for preparing aviation fuel by using a polyacid Cu-BTC supported Pd catalyst, which belongs to the technical field of aviation fuel preparation, wherein the polyacid Cu-BTC supported Pd catalyst is prepared by adopting a specific method, the Pd content is 2-7wt%, and the acid strength is 0.02-0.1mmol/g. Under the catalysis of a polyacid Cu-BTC supported Pd catalyst, H 2 、CO 2 and lignin oil are used as raw materials for a coupling reaction, and products are collected, rectified and purified after the reaction is finished to obtain aviation fuel.

Inventors

• ZHANG HAICHUAN

Assignees

• 杭州师范大学

Dates

Publication Date

20260508

Application Date

20240428

Claims (5)

1. 1. The application of the polyacid Cu-BTC supported Pd catalyst in preparing aviation fuel is characterized in that the preparation method of the polyacid Cu-BTC supported Pd catalyst comprises the following steps: (1) Dispersing copper salt, trimesic acid and polyvinylpyrrolidone modified Pd nano particles in an alcohol solvent, and stirring to obtain Cu-BTC loaded Pd nano particles; (2) Dispersing Cu-BTC loaded Pd nano particles in an alcohol solvent, stirring to obtain a first solution, dissolving heteropolyacid in the alcohol solvent, obtaining a second solution from heteropolyacid including silicotungstic acid, phosphotungstic acid, silicomolybdic acid or phosphomolybdic acid, transferring the second solution into the first solution, stirring and mixing, performing solvothermal reaction at 100-120 ℃ under 4-6 h, washing and drying the obtained solid product to obtain a polyacid Cu-BTC loaded Pd catalyst, wherein in the polyacid Cu-BTC loaded Pd catalyst, the Pd content is 2 wt-7 wt%, and the acid strength is 0.02-0.1 mmol/g; under the catalysis of the polyacid Cu-BTC supported Pd catalyst, H 2 、CO 2 and lignin oil are used as raw materials to carry out a coupling reaction, and after the reaction is finished, a product is collected, distilled and purified to obtain aviation fuel; the lignin oil is lignin pyrolysis oil.
2. 2. The use of the polyacid Cu-BTC supported Pd catalyst according to claim 1 in the preparation of aviation fuel, characterized in that in step (2), cu-BTC supported Pd nanoparticles are dispersed in an alcohol solvent and stirred at 25-35 ℃ for 8-12 h to obtain a first solution.
3. 3. The use of the polyacid Cu-BTC supported Pd catalyst according to claim 1 for the preparation of aviation fuel, characterized in that the molar ratio of H 2 to CO 2 is 3-5:1 and the flow rate of lignin oil is 0.1-0.2 mL/min when preparing aviation fuel.
4. 4. The use of the polyacid Cu-BTC supported Pd catalyst of claim 1 in the preparation of aviation fuel, characterized in that the reaction temperature is 200-400 ℃, the reaction time is 0.5-24 h, and the reaction pressure is 0-10 MPa when preparing aviation fuel.
5. 5. The use of the polyacid Cu-BTC supported Pd catalyst according to claim 1 for the preparation of aviation fuels, characterized in that alkanes or aromatics comprising C 8 -C 16 in aviation fuels are obtained.

Description

Method for preparing aviation fuel by using polyacid Cu-BTC supported Pd catalyst Technical Field The invention relates to the technical field of aviation fuel preparation, in particular to a method for preparing aviation fuel by using a polyacid Cu-BTC supported Pd catalyst. Background With the increasing exhaustion of fossil fuels and the aggravation of environmental pollution problems, the development of renewable energy sources and the reduction of greenhouse gas emissions have become key points for coping with climate change and protecting ecological environment. In this context, capture, storage and utilization (CCUS) technology of carbon dioxide has received a great deal of attention, and in particular, the conversion of carbon dioxide into valuable chemicals not only reduces greenhouse gas emissions, but also widens the carbon resource utilization routes. Lignin is a complex class of organic polymers, is the second largest biomass resource in the plant kingdom with reserves next to cellulose, and its conversion utilization is of great importance for the high-valued utilization of biomass resources. However, the technology of directly converting lignin into aviation fuel is challenging in efficiency and cost due to its good chemical stability, complex structure and difficult control of reaction paths. In view of this, there is an urgent need to develop a conversion pathway that can be effectively coupled to the conversion process of lignin oil during the hydroconversion process of carbon dioxide, thereby producing hydrocarbons that meet aviation fuel standards. In the prior art, the method for preparing aviation fuel by using lignin or lignin derivatives comprises the following steps: The Chinese patent document with publication number CN105441109A discloses a method for directionally synthesizing aviation kerosene aromatic components by utilizing lignin, which comprises the steps of firstly catalytically depolymerizing lignin raw materials into low-carbon aromatic hydrocarbon, wherein a catalyst is a Ga 2O3/MgO/HY catalyst modified by transition metal gallium and magnesium elements, depolymerizing and deoxidizing lignin supermolecules under the action of the catalyst to form a low-carbon aromatic hydrocarbon intermediate mainly containing C 6-C10, then directionally converting the low-carbon aromatic hydrocarbon intermediate into aromatic hydrocarbon in a kerosene range, wherein an alkylating agent is low-carbon olefin obtained by synchronously catalytically cracking biomass or biological oil, and the catalyst is xFeCl 3–[bmim]Cl–yAlCl3 (x, y=0.5-2) ionic liquid with acidity or strong acidity, and after the low-carbon aromatic hydrocarbon alkylation reaction, a kerosene range aromatic hydrocarbon product mainly containing C9-C14 is formed. The Chinese patent document with publication number CN117024238A discloses a method for synthesizing polycyclic alkane by lignin-derived phenols through a one-pot two-step method, wherein a hydrogenation catalyst is adopted to convert lignin-derived phenol compounds into ketone compounds, then the ketone compounds are subjected to aldol condensation reaction to prepare aviation kerosene precursors, and finally polycyclic alkane is generated through complete hydrodeoxygenation. The Chinese patent document with publication number of CN115746923A discloses a method for preparing aviation fuel by using lignin derivatives, which comprises the steps of carrying out alkylation reaction on lignin phenol derivatives and lignin aldehyde derivatives under the condition of no solvent by using heteropoly acid catalyst to obtain tricyclic oxygen-containing fuel precursors, and finally carrying out hydrodeoxygenation and isomerization reaction to form various isomerized cycloalkanes, wherein the alkylation temperature is 60-100 ℃ and the reaction time is 0.5-6 hours. The Chinese patent document with the publication number of CN116925804A discloses a method for preparing polycyclic hydrocarbon aviation kerosene from lignin-derived phenols and formaldehyde, which comprises the steps of carrying out phenolic aldehyde condensation reaction on phenolic compounds derived from agricultural and forestry waste and formaldehyde under the action of solid acid to form aviation kerosene precursors, and then carrying out hydrodeoxygenation on the aviation kerosene precursors by a bifunctional catalyst to obtain the polycyclic hydrocarbon aviation kerosene, wherein the molar ratio of the phenolic compounds to the formaldehyde is 0.5-10, the reaction temperature is 30-120 ℃, and the reaction time is 3-12 hours. The Chinese patent document with publication number CN113398886A discloses a method for co-producing adsorption active carbon and biological aviation fuel precursor by using waste lignin, which adopts waste lignin as a raw material, adds ZSM-5 and/or HZSM-5 catalyst, carbonizes the waste lignin at 300-600 ℃, and condenses the gas product obtained in the carbonization process to obtain th