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Catalyst for removing oxygen and improving quality of bio-oil and preparation method thereof

A catalyst and bio-oil technology, applied in the field of bio-oil deoxygenation and upgrading catalyst and its preparation, can solve the problems of insufficient catalyst stability and sulfur resistance, inability to effectively reduce the acidity of bio-oil, inability to balance strength and activity, etc. The effect of low oxygen content, improving economic and technical performance, and reducing production costs

Inactive Publication Date: 2011-10-19
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on bio-oil upgrading catalysts at home and abroad is gradually heating up, but according to the existing reports, there are still problems in the developed catalysts: (1) the strength and activity cannot be balanced; (2) the stability of the catalyst (anti-coking Performance, sulfur resistance) can not meet the needs of large-scale production of bio-oil, some catalysts with better stability are only the performance of catalytic gasification of one or two kinds of tar or bio-oil model compounds, for the actual bio-oil catalytic gas (3) More rare transition metals are used as cocatalysts to improve performance, but the cost performance of catalysts is reduced
At present, the research on deoxygenation and upgrading of bio-oil is carried out in two steps, that is, the first step is to quickly crack the biomass, cool the bio-oil vapor to obtain crude oil, and obtain high-quality bio-oil by hydrodeoxygenation and other methods. Although this method has made some progress, there are two main unfavorable factors in this technical route: one is the need to consume hydrogen, and the cost of hydrogen is high; the other is that this method cannot effectively reduce the acidity of bio-oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Tobacco rods are used as raw materials, which are crushed to a particle size of less than 1mm, cracked in a cracking furnace, and the cracking catalytic time is 10 minutes. The liquid product obtained without the action of a catalyst contains 11.47% of acetic acid, 12.52% of butyric acid, ring Hexanone is 7.32%, the nicotine content is 37.42%, the yield of liquid product is 42.30%, and the water content is 40.8%; When adopting the catalyst of Group A prepared above to carry out catalytic reforming to bio-oil vapor, the cracking catalytic time is 10 minutes, Liquid product was collected. Under the action of the catalyst, the liquid product does not contain acid compounds, and the yield of the liquid product is 42.88%, containing 35.6% of furan, 6.04% of butylamine, 7.19% of octyne, 12.75% of heptane, 20.18% of nicotine, and 20.18% of water content. 48.2%.

Embodiment 2

[0033] Using wheat stalks as raw materials, the catalyst of group B was selected, and the same steps as in Example 1 were adopted to collect the liquid product. Phenols are the main components of bio-oil without catalyst, except for p-methoxyphenol (13.15%), phenol (10.51%), dimethoxyphenol (9.97%), methylmethoxyphenol (5.04%) , ethyl methoxyphenol (3.79%), cyclopentenone (8.48%), furfural (7.68%), etc. accounted for about 30%; under the action of the catalyst, the main components of bio-oil are furfural and furan. The sum of the concentration is 74.42%. In addition, there are hydrocarbons, such as nonyne, dimethylcyclohexene (2.76%), and decane (1.96%), which account for about 15%.

Embodiment 3

[0035] Using Chinese fir as raw material, select group C catalyst for use, adopt the same steps as in Example 1, collect the liquid product, the main components in the bio-oil without catalyst are furfural (22.57%), cyclopentenone (0.22%), 2-methanone Oxyphenol (21.76%), levoglucosan (8.45%), and hydroxybutyric acid (11.64%); under the action of the catalyst, the main components of the bio-oil are furfural and methylfurfural. The sum of the relative concentrations of the two substances reaches 83.38%, There are also alkanes octadecane (2.19%) and cyclopentenone (4.15%).

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Abstract

The invention relates to a catalyst for removing oxygen and improving quality of bio-oil and a preparation method thereof. The catalyst comprises active ingredients and a carrier, and is characterized by comprising the following active ingredients and carrier in percentage by weight: 10 to 32 percent of NiO, 5 to 18 percent of MnO3, 5 to 15 percent of CoO and the balance of dolomite carrier. The catalyst has the advantages that: the cheap and readily available dolomite is taken as the carrier, and the active ingredients are compounds of nickel, cobalt and molybdenum, so that the acidity of the bio-oil is weakened and the oxygen content is reduced. The catalyst is easy to prepare, has high strength and catalytic activity, can be regenerated, can be used for preparing high-quality bio-oil from biomass, and also can be applied to preparation of hydrogen through catalytic reforming of the bio-oil.

Description

technical field [0001] The invention relates to a bio-oil deoxidation and upgrading catalyst and a preparation method thereof, that is, a method for preparing a catalyst for high-quality liquid fuel by catalytic cracking conversion of biomass. Background technique [0002] Both at home and abroad attach great importance to the research of biomass cracking and liquefaction. The current rapid cracking technology has achieved satisfactory results in improving the yield of biomass liquefaction. Typical fast cracking reactors include fluidized bed, rotating conical bed, etc. Although the yield of biomass rapid pyrolysis bio-oil is high, it cannot be used as high-quality energy due to its complex composition, high oxygen content, and low calorific value. Converting renewable biomass resources into clean high-quality liquid fuels is crucial to alleviate my country's oil shortage is of great significance to ensure my country's energy security and sustainable development of the natio...

Claims

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Application Information

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IPC IPC(8): B01J23/883C10G3/00
CPCY02P30/20
Inventor 刘少敏陈明强王君陈明功杨忠连张鹏
Owner ANHUI UNIV OF SCI & TECH
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