Novel IGCC system and method for realizing CO2 capture before combustion by using mixed conductor oxygen permeation membrane reactor

A mixed conductor, membrane reactor technology, applied in chemical instruments and methods, hydrogen production, carbon compounds, etc., can solve the problem of high energy consumption

Inactive Publication Date: 2020-02-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the complex and high energy consumption problems in these systems, there is a need to cool down first before desulfurization unit, and after desulfurization, the temperature needs to be raised to enter the membrane reactor unit.

Method used

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  • Novel IGCC system and method for realizing CO2 capture before combustion by using mixed conductor oxygen permeation membrane reactor
  • Novel IGCC system and method for realizing CO2 capture before combustion by using mixed conductor oxygen permeation membrane reactor
  • Novel IGCC system and method for realizing CO2 capture before combustion by using mixed conductor oxygen permeation membrane reactor

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Effect test

Embodiment 1

[0056] 75wt.% Ce 0.85 SM 0.15 o 2-δ -25wt.%Sm 0.6 Sr 0.4 Cr 0.3 Fe 0.7 o 3-δ (LL Cai, etal.J.Membr.Sci.2016,520,607–615.) As a membrane material in a membrane reactor, a sheet-shaped supporting membrane is prepared, and the thickness of the dense layer is ~36μm, such as figure 2 . Brushing Ni / Ce on membrane dense layer (syngas side) 0.85 SM 0.15 o 1.925 (Ni / SDC) catalyst, water side impregnated Ni / SDC catalyst. The membrane is sealed in the membrane reactor with a silver ring. After slowly cooling down to 900°C, the flow rate of the water side of the membrane is 180mL min -1 H 2 O, the synthesis gas side uses a flow rate of 100mL min -1 Syngas (50% CO, 49.94% H 2 , 600ppmH 2 S). The hydrogen separation rate is 14.6mL cm -2 min -1 , The CO conversion rate was 8.3%. After a 100h stability test, the hydrogen separation performance did not attenuate, and the CO conversion rate remained constant.

Embodiment 2

[0058] SrFe 0.9 Ta 0.1 o 3-δ (WQ Jin, et al. J. Mater. Chem. A, 2015, 3, 22564–22573.) The membrane material was pressed into a sheet-like membrane with a thickness of ~0.5 mm. The Ru / SDC catalyst was brush-coated on both sides of the membrane, and the membrane was sealed in the membrane reactor with a silver ring. After slowly cooling down to 900°C, the flow rate of the water side of the membrane is 180mL min -1 H 2 O, the synthesis gas side uses a flow rate of 100mLmin -1 Syngas (50% CO, 49.96% H 2 , 400ppm H 2 S). The hydrogen separation rate is 8.2mL cm -2 min -1 , The CO conversion rate was 6.3%. After a 100h stability test, the hydrogen separation performance did not attenuate, and the CO conversion rate remained constant.

Embodiment 3

[0060] 75wt.% Ce 0.85 SM 0.15 o 2-δ -25wt.%Sm 0.6 Sr 0.4 al 0.3 Fe 0.7 o 3-δ (XF Zhu, et al. Solid State Ionics 2013, 253, 57–63.) The membrane material was prepared as a tubular membrane, and the thickness of the outer dense layer was ~40 μm. The Ru / SDC catalyst is brushed on the outside of the membrane, and the Ru / SDC catalyst is impregnated on the inside. The membrane is sealed in the membrane reactor with a silver ring. After slowly cooling down to 800°C, the inner side of the membrane (water side) was fed with a flow rate of 180mL min -1 H 2 O, outside (syngas side) with a flow rate of 100mL min -1 Syngas (50% CO, 49.96% H 2 , 400ppm H 2 S). The hydrogen separation rate is 11.4mL cm -2 min -1 , The CO conversion rate was 7.5%, and the stability test was carried out for 100 hours. The hydrogen separation performance did not decay, and the CO conversion rate remained constant.

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Abstract

The invention discloses a novel IGCC system and a method for realizing CO2 capture before combustion by using a mixed conductor oxygen permeation membrane reactor. The system comprises: a membrane reactor unit; a cooling unit; a CO2 compression capture unit; an S and H2O filtering unit (5); an S collector unit (6); a vaporizing chamber on the water side of the membrane reactor; and a H2 combustionpower generation unit at a water side outlet. According to the invention, crude synthesis gas obtained by an industrial integrated gasification combined cycle (IGCC) system is used as a raw material,hydrogen is obtained on one side of the mixed conductor oxygen permeation membrane reactor and is subjected to combustion and power generation, and high-purity CO2 is obtained on the other side of the mixed conductor oxygen permeation membrane reactor and is subjected to compression and liquefaction so as to achieve CO2 capture before combustion; and with the system and the method, the mixed conductor oxygen permeation membrane reactor and the IGCC system are combined for the first time to achieve the CO2 capture before combustion.

Description

technical field [0001] The invention relates to the realization of CO by using a mixed conductor oxygen-permeable membrane reactor 2 New systems for pre-combustion capture, especially with regard to CO in IGCC systems 2 Capture before combustion, effectively reduce energy consumption and improve power generation efficiency, and belong to the technical field of gas separation and purification, energy saving and emission reduction. [0002] technical background [0003] At present, the problem of global warming is becoming more and more serious, CO 2 As the main greenhouse gas, it has aroused the attention of countries all over the world to reduce CO emissions. 2 issue of concern. Improve the utilization efficiency of fossil energy and reduce CO in the process of utilization 2 capture is to reduce CO 2 Two important measures of emissions. Pre-combustion capture is mainly used in the integrated gasification combined cycle system (IGCC), where the high-pressure oxygen-enric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/50C01B3/04C01B17/04
CPCC01B3/042C01B17/04C01B2203/06C01B32/50Y02E60/36Y02P30/00
Inventor 朱雪峰蔡莉莉杨维慎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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