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Method for preparing high-sulfur iron-containing series desulfurizing agent

An iron-based desulfurization and high sulfur capacity technology, applied in the direction of reducing gas emissions, can solve the problems of obvious atmosphere effect, easy pulverization, and poor cycle stability of desulfurizers

Inactive Publication Date: 2008-02-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the past two decades, it has developed from a single metal oxide iron oxide, zinc oxide, copper oxide, and calcium oxide to zinc ferrite and zinc titanate composite oxides that take into account their respective advantages. Research on cerium oxide desulfurizers with sulfur recovery characteristics, but there are common problems such as poor cycle stability of desulfurizers, easy pulverization, and obvious atmosphere effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0012] Composition of desulfurizer components: nano-iron oxide 15%, CeO 2 5%, NiO3%, inorganic binder clay 66%, light magnesium oxide 3%, starch 8%.

[0013] A cylindrical desulfurizer with a diameter of φ5 mm×3 to 5 mm was obtained according to the above ratio (calcination temperature was 750° C., 3 h), and 20 ml was filled in the above-mentioned reaction tube at a temperature of 400° C. for five desulfurization cycles. The results are as follows (inlet hydrogen sulfide concentration is 3000ppm).

[0014] Desulfurization cycle times

Embodiment approach 2

[0016] The components of the desulfurizer are: nano-iron oxide 20%, CeO 2 3%, Inorganic Binder Clay 65%, SiO 2 5%, light magnesium oxide 2%, starch 5%. Others are the same as Embodiment 1, and the results are as follows.

[0017] Desulfurization cycle times

[0018] Activity evaluation shows that the desulfurizer still has good mechanical stability and high sulfur capacity after 5 cycles.

Embodiment approach 3

[0020] The components of the desulfurizer are: nano-iron oxide 47%, NiO 1%, CeO 2 4% Inorganic Binder Clay 36%, SiO 2 3%, Light Magnesium Oxide 4%, Starch 5%.

[0021] The preparation method is the same as that of Embodiment 1. The desulfurization agent prepared is subjected to desulfurization tests at different desulfurization temperatures in the reaction tube, and the results are as follows (inlet hydrogen sulfide concentration is 3000ppm).

[0022] Desulfurization temperature (℃)

[0023] Minimum Exit H 2 The concentration of S can reach about 1ppm, and the desulfurizer can maintain good desulfurization activity in the medium and high temperature range of 350-450°C.

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Abstract

A preparation method of high sulfur capacity ferrous desulfurizer belongs to the field of coal chemical industry and preparation and application of desulfurizer, in particular to a preparation of a high temperature ferrous desulfrizer in the field of preparation and gas purification. The main active component of the desulfurizer is a nanometer frric oxide treated by a particularly technique process as that: the nanometer frric oxide is added with component such as vulcanization accelerator, carbon resistant promoter, strength enhancer and binder, then uniformly mixed by grinding and kneaded to shape, finally, dried or roasted to shape strip, granule or flake. The desulfurizer is characterized by high desulfurating efficiency, stable circulation and high sulfur capacity, etc. At least the desulfurizer removes H2S from 2000-5000ppm in entrance to 1ppm, and is suitable for removing H2S in surlfur gas of coal gas or natural gas under the temperature of 350-450 DEG C.

Description

1. Technical field [0001] The preparation method of the high-sulfur-capacity iron-based desulfurizer of the invention belongs to the technical field of coal chemical industry and the preparation and application of desulfurizers, and specifically relates to the fields of preparation and gas purification. 2. Background technology [0002] Coal has been my country's main energy source for a long time, and by 2020, the proportion of coal in primary energy will not be lower than 60%. In my country's coal consumption, about 80% is used for direct combustion, of which power generation accounts for about 53% (about 830 million tons of coal for power generation in 2003), and coking accounts for about 27%. Power generation and coking are the largest coal-consuming industries in my country. Due to the low efficiency of coal-fired power generation in my country (average 35%), the proportion of direct combustion is large, and the combustion and other conversion and utilization technologi...

Claims

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Application Information

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IPC IPC(8): C21C7/064
CPCY02P10/143
Inventor 常丽萍任秀蓉郭红生张宗友谢克昌
Owner TAIYUAN UNIV OF TECH
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