Method of gasifying carbonaceous material and a gasification system

Inactive Publication Date: 2013-11-21
CURTAIN UNIV OF TECH
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Benefits of technology

[0031]In this way, the gasification system of the present inven

Problems solved by technology

Gasification of a carbonaceous material can be conceptually divided into two steps although a clear distinction between the two steps is not possible.
The complete reforming of the tarry components of the volatiles is one of the most important considerations in the design of a gasifier because the removal of tar is cumbersome and costly.
Secondly, low rank fuels often contain well-dispersed alkali and alkaline earth metallic (AAEM) species that can volatilise easily during pyrolysis and gasification.
The volatilised AAEM species in the gasification product gas can cause corrosion/erosion of turbine/engine components.
Thirdly, char and volatiles from low-rank fuels are very

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  • Method of gasifying carbonaceous material and a gasification system
  • Method of gasifying carbonaceous material and a gasification system

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Embodiment Construction

[0058]Embodiments of the present invention relate to a method 10 of gasifying a carbonaceous material, a gasification system 20, 40, and an apparatus 30 for pyrolysing carbonaceous material as described with reference to FIGS. 1 to 4.

[0059]It will be appreciated that the method 10 may be performed in a gasification vessel having integrally defined therein a pyrolysis zone for pyrolysing carbonaceous material, a char gasification zone for gasifying the char with steam and an oxygen-containing gas, a reforming zone for reforming volatiles with steam to produce a product gas, and a gas cleaning zone to clean the product gas. An embodiment of the gasification vessel in accordance with the present invention will be described in more detail in later pages in the description.

[0060]In its broadest form, and as shown in FIG. 1, the gasification method 10 comprises the steps of pyrolysing 12 the carbonaceous material to produce volatiles and char, separating 14 the char and the volatiles, gas...

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Abstract

A method of gasifying carbonaceous material is described. The method comprises a first step of pyrolysing and partially gasifying the carbonaceous material to produce volatiles and char. The volatiles and the char are then separated and, subsequently, the char is gasified and the volatiles are reformed. The raw product gas is then finally cleaned with char or char-supported catalysts or other catalysts.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a method of gasifying carbonaceous material and a gasification system.BACKGROUND OF THE INVENTION[0002]Gasification refers to the conversion of a solid or liquid material, such as a carbonaceous material, into a gaseous fuel. Gasification is of interest for many low-emission technologies in chemical and energy industries.[0003]Gasification of a carbonaceous material can be conceptually divided into two steps although a clear distinction between the two steps is not possible. As the (solid) carbonaceous material is heated up, a mixture of gas and vapour (“volatiles”), including moisture of the carbonaceous material, is released from the carbonaceous material, leaving a solid residue (“char”). Both the volatiles and the char then react with gasifying agents such as H2O and O2 to form a product gas.[0004]Low-rank carbonaceous fuels such as brown coal (lignite), peat, biomass and solid wastes are particularly suitable for gasi...

Claims

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Application Information

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IPC IPC(8): C10J3/64C10B47/06
CPCB01J21/18C10J3/64B01J23/755C10J3/20C10J3/32C10J3/38C10J2300/0916C10J2300/094C10J2300/0956C10J2300/0973C10K3/02C10J3/62C10J3/721C10K3/00C10K3/006C10K3/023C10K3/04C10B47/06B01J23/745C10B57/00C10J3/58C10J2300/0986Y02P20/52C10J3/66C10J2200/09C10J2300/1246
Inventor LI, CHUN-ZHUWU, HONGWEIASADULLAH, MOHAMMADWANG, XIAOSHAN
Owner CURTAIN UNIV OF TECH
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