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Device and process for producing liquid hydrocarbon products from biomass

A technology for liquid hydrocarbons and biomass, which is applied in the field of Fischer-Tropsch synthesis to produce liquid hydrocarbon products, can solve the problems of increasing the tail gas discharge of the second-stage device, the complicated water-gas shift process, and reducing the system economy. The effect of reducing energy consumption and reducing investment

Active Publication Date: 2017-05-03
WUHAN KAIDI ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patents CN1354779A and CN1761734A respectively announced a process for Fischer-Tropsch synthesis to produce liquid hydrocarbon products, but the low H 2 Attention should be paid to the effective treatment of / CO volume ratio
[0006] Chinese patent CN200310108146.X discloses a process for producing liquid hydrocarbon products from syngas. The process adopts a two-stage Fischer-Tropsch synthesis device. The inert gas produced by the first-stage Fischer-Tropsch synthesis device will accumulate in the second-stage device, resulting in In actual operation, it is necessary to reduce the concentration of inert gas in the circulating gas in the second-stage device by increasing the exhaust gas discharge of the second-stage device to maintain the operation, which reduces the economy of the entire system
[0008] To sum up, the water-gas shift process is a link commonly used in Fischer-Tropsch synthesis to produce liquid hydrocarbon products. However, the water-gas shift process is complicated and the equipment investment is high, which reduces the economical efficiency of the entire device.
At present, there is no effective technological method to solve these problems

Method used

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  • Device and process for producing liquid hydrocarbon products from biomass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040]The composition of crude syngas produced from biomass fuel is shown in Table 1, H 2 / CO volume ratio is 0.8:

[0041] Table 1 Composition of crude syngas produced from biomass

[0042] composition Volume content v% H 2

34 CO 42 CO 2

19 CH 4

2 N 2

3

[0043] The main process operating conditions are set as follows:

[0044] 1. The mixing volume ratio of recycle gas and crude synthesis gas is 3.5:1;

[0045] 2. The operating temperature of the Fischer-Tropsch synthesis reactor (gas synthesis unit 3) is 250°C;

[0046] 3. The operating pressure of the Fischer-Tropsch synthesis reactor is 2.5Mpa.

[0047] H in the refined synthesis gas required by gas synthesis unit 3 2 With a volume ratio of 1.2 to CO, the effective syngas H in the refined syngas 2 and CO(H 2 +CO) accounts for 50% of the total gas volume of the refined synthesis gas;

[0048] Each ton of biomass fuel can produce 53kg of liquid hydrocarbon pro...

Embodiment 2

[0050] The composition of crude syngas produced by biomass fuel is shown in Table 2, H 2 / CO volume ratio is 0.9:

[0051] Table 2 Composition of crude syngas produced from biomass

[0052] composition Volume content v% H 2

36 CO 40 CO 2

20 CH 4

2 N 2

2

[0053] The main process operating conditions are set as follows:

[0054] 1. The mixing volume ratio of recycle gas and crude synthesis gas is 2.5:1;

[0055] 2. The operating temperature of the Fischer-Tropsch synthesis reactor (gas synthesis unit 3) is 270°C;

[0056] 3. The operating pressure of the Fischer-Tropsch synthesis reactor is 3.5Mpa;

[0057] H in the refined synthesis gas required by gas synthesis unit 3 2 With a volume ratio of 1.1 to CO, the effective syngas H in the refined syngas 2 and CO(H 2 +CO) accounts for 45% of the total gas volume of the refined synthesis gas;

[0058] The liquid hydrocarbon product that can be produced per ton of bioma...

Embodiment 3

[0060] The composition of crude syngas produced by biomass fuel is shown in Table 3, H 2 / CO volume ratio is 1.0:

[0061] Table 3 Composition of crude syngas produced from biomass

[0062] composition Volume content v% H 2

37 CO 37

[0063] CO 2

20 CH 4

2 N 2

4

[0064] The main process operating conditions are set as follows:

[0065] 1. The mixing volume ratio of recycle gas and crude synthesis gas is 2.8:1;

[0066] 2. The operating temperature of the Fischer-Tropsch synthesis reactor (gas synthesis unit 3) is 280°C;

[0067] 3. The operating pressure of the Fischer-Tropsch synthesis reactor is 3.0Mpa.

[0068] H in the refined synthesis gas required by gas synthesis unit 3 2 With a volume ratio of 1.4 to CO, the effective syngas H in the refined syngas 2 and CO(H 2 +CO) accounts for 55% of the total gas volume of the refined synthesis gas;

[0069] The liquid hydrocarbon product that can be produc...

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Abstract

The invention discloses a device for manufacturing liquid hydrocarbon products by biomass. The device comprises a gasification device, a gas purification device and a gas synthesis device, wherein the input end of the gasification device is a biomass fuel input end; the coarse synthesis gas output end of the gasification device is connected with the input end of the gas purification device through a coarse synthesis gas conveying pipeline; the fine synthesis gas output end of the gas purification device is connected with the input end of the gas synthesis device; the output end of the gas synthesis device is a liquid hydrocarbon output end; the circulation gas output end of the gas synthesis device is connected into the coarse synthesis gas conveying pipeline. The water gas conversion work procedure in the existing process method is omitted, and in addition, the Fischer-Tropsch synthesis reaction requirements can be met, so that the green and efficient utilization of renewable energy sources of the biomass is realized.

Description

technical field [0001] The invention relates to the technical field of production of liquid hydrocarbon products by Fischer-Tropsch synthesis, in particular to a device and process for producing liquid hydrocarbon products from biomass. Background technique [0002] Fischer-Tropsch synthesis is a process in which synthetic gas formed by converting fossil energy such as coal and natural gas or renewable energy such as biomass is converted into liquid hydrocarbon products under the action of a catalyst. plays an important role. [0003] H in crude synthesis gas produced from biomass 2 The / CO volume ratio is generally low, and the general process route is that the crude synthesis gas is adjusted by water-gas shift first, and then the CO is removed through the decarbonization process. 2 so that the H 2 The / CO volume ratio is approximately equal to 2, thus meeting the requirements of Fischer-Tropsch synthesis production. [0004] Chinese patents CN1354779A and CN1761734A re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G2/00
Inventor 宋侃金家琪
Owner WUHAN KAIDI ENG TECH RES INST CO LTD
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