Preparation method and application of biomass liquid fuel

Abstract

The invention relates to a preparation method of a biological liquid fuel, which comprises the following steps of: placing crushed biomass, a heat carrier and a catalyst in a reaction kettle according to the mass ratio of the biomass to the heat carrier to the catalyst of 1: 5: 0.05, heating at the temperature of 290-330 DEG C for 30 minutes to 2 hours, and treating the obtained cracking product to obtain the biomass liquid fuel and biochar. And hydrofining the biological liquid fuel to obtain biodiesel, bio-gasoline and aviation oil. By using the heat carrier, heat can be timely and uniformly transferred to biomass, the cracking temperature is low and is 290-330 DEG C, the energy consumption is low, the benefit is high, the heat carrier can be recycled, and zero emission is realized in the cracking process; compared with dry distillation bio-oil, the bio-oil prepared by the method has the advantages that the density is low and is 0.86 g / cm < 3 >; the calorific value of the biomass oil prepared by the method is high and is 45.5 MJ / Kg; the biomass oil prepared by the method is high in purity, free of pollution and free of sulfur, wax, oxides and nitrides.

Description

[0001] This invention is application number CN202211461973.6, and its invention name is invention patent divisional application for a method for preparing biomass liquid fuel. The original application date is November 22, 2022. Technical Field

[0002] The invention relates to the technical field of preparation of biomass liquid fuel, and in particular to a method for preparing biomass liquid fuel. Background Art

[0003] The existing preparation of biomass liquid fuel is generally to directly distill and crack the biomass. The disadvantage is that no liquid heat carrier is used in the cracking process, and the cracking temperature is high, 500-800°C, resulting in low output and high energy consumption; the prepared biomass liquid fuel has a high density of 1.2g / cm 3 , low calorific value. Summary of the invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a novel method for preparing biomass liquid fuel.

[0005] A method for preparing biomass liquid fuel, the method comprising: placing pulverized biomass, a heat carrier and a catalyst in a reaction kettle according to a mass ratio of biomass: heat carrier: catalyst = 1:5:0.05, heating the reaction vessel at a temperature of 290-330°C, and performing a cracking time of 30 min-2 h; and treating the cracking products to obtain biomass liquid fuel (density 0.86 g / cm3) and biochar.

[0006] The heat carrier is sand or heat transfer oil; the heat transfer oil is dibenzyltoluene or biomass oil with the same boiling point, flash point and auto-ignition point as dibenzyltoluene.

[0007] The catalyst is a mixture of silicon-aluminum molecular sieve and clay, with a mass ratio of silicon-aluminum molecular sieve: clay = 1:1.2.

[0008] The beneficial effects of the present invention are:

[0009] 1. The use of heat carrier can transfer heat to biomass in a timely and uniform manner, making the biomass have good fluidity, low cracking temperature of 290-330℃, low energy consumption, high output rate of biomass liquid fuel, heat carrier can be recycled, and zero emission in the cracking process.

[0010] 2. Compared with dry distillation bio-oil, the biomass liquid fuel prepared by this method has a lower density. The density of dry distillation bio-oil is 1.2g / cm3, and the density of biodiesel obtained after hydrofining of the biomass liquid fuel prepared by this method is 0.837g / cm3.

[0011] 3. The calorific value of the bioliquid fuel prepared by this method is high, which is 45.5MJ / Kg.

[0012] 4. The bio-liquid fuel prepared by this method is of high purity, pollution-free, and does not contain sulfur, wax, oxides, and nitrides. DETAILED DESCRIPTION

[0013] A method for preparing biomass liquid fuel, the method comprising: placing crushed biomass, heat carrier and catalyst in a reactor according to a mass ratio of biomass: heat carrier: catalyst = 1:5:0.05, heating at 290-330°C, cracking for 30min-2h, and treating the cracked product to obtain biomass liquid fuel and biochar. The biomass liquid fuel is hydrofined and split to obtain biodiesel, biogasoline and aviation fuel.

[0014] The heat carrier is sand or heat transfer oil; the heat transfer oil is dibenzyltoluene or biomass oil with the same boiling point, flash point and auto-ignition point as dibenzyltoluene.

[0015] The catalyst is a mixture of silicon-aluminum molecular sieve and clay, and the mass ratio is silicon-aluminum molecular sieve: clay=1:1.2.

[0016] The white clay can be purchased on the market. The white clay is grayish white granular powder, has a large specific surface area and pore volume, has special adsorption capacity and ion exchange performance, has strong decolorization ability and activity, and has good stability after decolorization.

[0017] Embodiment 1:

[0018] A method for preparing biomass liquid fuel, the method comprising: placing crushed biomass, heat carrier and catalyst in a reactor according to a mass ratio of biomass: heat carrier: catalyst = 1:5:0.05, heating at 290°C, cracking for 2 hours, and treating the cracking products to obtain biomass liquid fuel and biochar. The biomass liquid fuel is hydrofined and split to obtain biodiesel, biogasoline and aviation fuel.

[0019] Embodiment 2:

[0020] A method for preparing biomass oil, the method comprising: placing crushed biomass, heat carrier and catalyst in a reactor according to a mass ratio of biomass: heat carrier: catalyst = 1:5:0.05, heating at 330°C, cracking for 30 minutes, and treating the cracking products to obtain biomass liquid fuel and biochar. The biomass liquid fuel is hydrofined and split to obtain biodiesel, biogasoline and aviation fuel.

[0021] Embodiment 3:

[0022] A method for preparing biomass liquid fuel, the method comprising: placing crushed biomass, heat carrier and catalyst in a reactor according to a mass ratio of biomass: heat carrier: catalyst = 1:5:0.05, heating at 320°C, cracking for 1 hour, and treating the cracking products to obtain biomass liquid fuel and biochar. The biomass liquid fuel is hydrofined and split to obtain biodiesel, biogasoline and aviation fuel.

Claims

1. A method for preparing bioliquid fuel, characterized in that: The method comprises the following steps: mixing the crushed biomass, the heat carrier and the catalyst in a mass ratio of biomass: heat carrier: catalyst = 1: 5:0.05 is placed in a reactor for cracking, and the cracking products are processed to obtain biomass liquid fuel and biochar.

2. The method for preparing a biomass liquid fuel according to claim 1, characterized in that: The heating temperature for the cracking is preferably 320°C.

3. The method for preparing a biomass liquid fuel according to claim 1, characterized in that: The heat carrier is heat-conducting oil.

4. The method for preparing a bioliquid fuel according to claim 3, characterized in that: The heat transfer oil is dibenzyltoluene or biomass oil.

5. The method for preparing a bioliquid fuel according to claim 1, characterized in that: The catalyst is a mixture of silicon-aluminum molecular sieve and clay, and the mass ratio is: silicon-aluminum molecular sieve: clay = 1:1.

2.

6. The method for preparing a biomass liquid fuel according to claim 1, characterized in that: The cracking conditions are as follows: a heating temperature of 290 to 330° C. and a cracking time of 30 min to 2 h.

7. A biomass liquid fuel, characterized in that: Prepared by any one of the preparation methods of claims 1-6.

8. Use of the bioliquid fuel as claimed in claim 7 in the preparation of biodiesel, biogasoline and bio-aviation fuel.