Acid Gas Combustion Using In Situ Oxygen Production and Chemical Looping Combustion

A chemical chain combustion and acid gas technology, which is applied in the direction of fuel burning in molten state, fluidized bed combustion equipment, oxygen/ozone/oxide/hydroxide, etc., can solve the problem of no high cost and avoid direct contact , fully transformed effect

Inactive Publication Date: 2018-03-27
SAUDI ARABIAN OIL CO
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Problems solved by technology

Further, there is a need for an acid gas combustion method with high energy conversion efficiency, but without the high cost of H 2 S pretreatment

Method used

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  • Acid Gas Combustion Using In Situ Oxygen Production and Chemical Looping Combustion

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Embodiment Construction

[0017] As mentioned earlier, chemical looping combustion (CLC) usually employs a dual fluidized bed system (circulating fluidized bed process) in which metal oxides are used as bed materials to provide fuel in the reactor. Oxygen for combustion. The reduced metal oxides are then transferred to the second bed (air reactor) and re-oxidized and reintroduced back to the fuel reactor to complete the cycle. Therefore, chemical looping combustion (CLC) uses two or more reactions to complete the oxidation of hydrocarbon fuels. In its simplest form, an oxygen-carrying species (usually a metal) is first oxidized in air to form an oxide. Then, the oxide is reduced by the hydrocarbon as reducing agent in the second reaction.

[0018] The CLC process of the present invention aims to overcome the deficiencies associated with traditional CLC processes of acid gas combustion. As stated, unlike conventional CLC processes where the acid gas is in direct contact with the oxygen carrier (e.g.,...

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Abstract

A chemical looping combustion (CLC) process for acid gas combustion includes a series of reaction zones and is configured to provide in situ production of oxygen and in situ removal of SO2 gas from a product stream by passing through a reaction zone A certain position of SO2 reacts with calcium-based adsorbent to remove it. The CLC process is also configured to produce oxygen in situ due to the use of metal oxide oxygen carriers deliberately placed out of direct contact with the acid gas, thereby eliminating undesired Desired generation of sulfur-based metal oxides.

Description

technical field [0001] The invention relates to a method for generating heat and steam by using a chemical loop combustion (CLC) method to burn acid gas or low calorific value gas. More specifically, the present invention relates to the efficiency improvement of an acid gas chemical looping combustion process and the in situ reduction of polluting gases such as SO 2 . Background technique [0002] Increased concern over global warming in recent decades has led to increased research in the field of power generation. In response to the adverse effects of global warming, different measures have been introduced. One such measure is carbon capture and storage (CCS), which is widely considered a medium- to long-term mitigation measure for carbon dioxide emissions. CCS has valuable and environmental potential if CO 2 This potential can be realized when captured and used in industrial applications. Nevertheless, the current problem is that most known CCS methods are costly. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/50C01B17/56C01B13/02
CPCC01B13/0203C01B17/508F23C2900/99008C01B17/44C01F11/46C01F11/464C01F11/48F23C10/10Y02E20/34B01D53/1481
Inventor 阿里·霍泰特
Owner SAUDI ARABIAN OIL CO
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