KR20140064316A - Ce-la complex oxide desulfurization sorbent, and preparation of the same - Google Patents

Ce-la complex oxide desulfurization sorbent, and preparation of the same Download PDF

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KR20140064316A
KR20140064316A KR1020120131513A KR20120131513A KR20140064316A KR 20140064316 A KR20140064316 A KR 20140064316A KR 1020120131513 A KR1020120131513 A KR 1020120131513A KR 20120131513 A KR20120131513 A KR 20120131513A KR 20140064316 A KR20140064316 A KR 20140064316A
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desulfurizing agent
lanthanum
complex oxide
cerium
composite oxide
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KR101422117B1 (en
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박종호
전상구
나정걸
정태성
노남선
이광복
김진철
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한국에너지기술연구원
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    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
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    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04

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Abstract

The present invention relates to a Ce-La complex oxide desulfurizing agent and a manufacturing method thereof, and specifically, to a Ce-La complex oxide desulfurizing agent and a manufacturing method characterized by mixing La (lanthanum) that is an oxidation promoting substance into a Ce (cerium) based desulfurizing agent using a coprecipitation and a sintering process. By using the Ce-La complex oxide desulfurizing agent of the present invention, a desulfurizing process having high durability at high temperatures and high efficiency in the oxidizing atmosphere can be realized.

Description

Ce-La 복합 산화물 탈황제 및 그 제조방법{Ce-La Complex oxide desulfurization sorbent, and preparation of the same}Ce-La complex oxide desulfurizing agent and a method for producing the same,

본 발명은 Ce-La 복합 산화물 탈황제 및 그 제조방법으로서, 자세하게는 Ce(cerium) 계 탈황제에 공침법과 소성을 통하여 산화증진성분인 La(lanthanum)을 혼합한 것을 특징으로 하는 Ce-La 복합 산화물 탈황제 및 그 제조방법에 대한 것이다. 본 발명의 Ce-La 복합 산화물 탈황제를 사용함으로써, 고온에서도 높은 내구성을 가지고 산화분위기에서도 고효율의 탈황공정을 구현할 수 있다.
The present invention relates to a Ce-La composite oxide desulfurizing agent and a production method thereof, and more particularly, to a Ce-La composite oxide desulfurizing agent characterized by mixing La (lanthanum) as an oxidation promoting component through coprecipitation and calcination of a Ce (cerium) A desulfurizing agent and a method for producing the same. By using the Ce-La composite oxide desulfurizing agent of the present invention, it is possible to realize a high-efficiency desulfurization step with high durability even at high temperature and in an oxidizing atmosphere.

석탄 가스화 복합 발전(IGCC) 공정에 있어서, 가스 터빈에 유입되는 연료 기체 중의 H2S 및 COS를 제거하는 기술은 가스 터빈의 부식을 방지하는 데 있어서 매우 중요한 기술이다. 또한, 고품위화 공정이 필요하지 않은 양질의 원유가 점차 고갈됨에 따라 원유수급을 맞추기 위해 저렴하고 매장량이 풍부한 중질 또는 초중질유분의 확보가 점점 필요해지고 있으나, 이러한 초중질유의 경우 유동성이 낮고 유황분과 같은 불순물의 함량이 높아 수요자에게 공급하기 위해서는 여러단계의 고품위화 공정이 필수적이다. In the coal gasification combined cycle (IGCC) process, the technology of removing H 2 S and COS in the fuel gas flowing into the gas turbine is a very important technique for preventing the corrosion of the gas turbine. In addition, as the quality of crude oil, which does not require a high-grade process, gradually becomes exhausted, it is increasingly necessary to secure an inexpensive and rich reservoir of heavy or superheated oil in order to meet the supply and demand of crude oil. However, such superheated oil has low fluidity, Since the impurity content is high, several stages of high-quality conversion process are essential to supply to the consumer.

특히, 고품위화 공정의 탈황공정은 후단 경질화 생성물의 활용에 필수적인데, 상용화된 습식 탈황 기술인 ZnO 흡착제는 황화 수소의 제거 성능과 재생성이 매우 우수한 것으로 보고되고 있으나, 가스화 기술에 적용하기 어려워 에너지 손실이 적은 건식 탈황기술에 대한 연구가 활발하게 진행 중이다. In particular, the desulfurization process of the high-grade process is essential for utilization of the post-hardening product. The commercially available wet desulfurization technique, ZnO adsorbent, has been reported to have excellent removal efficiency and regeneration of hydrogen sulfide. However, Research on dry desulfurization technology with a small amount of this is actively under way.

현재까지 Fe2O3, TiO2, CuO 등과 같은 다양한 금속산화물을 첨가한 복합 산화물이 건식탈황제인 금속탈황제의 한계(고온휘발, 낮은 황 회수효율, 반복적 사용의 제한 등)를 극복하기 위하여 연구되었다.To date, complex oxides containing various metal oxides such as Fe 2 O 3 , TiO 2 , and CuO have been studied to overcome the limitations of metal desulfurizers (high temperature volatilization, low sulfur recovery efficiency, and limitations of repeated use) .

한편, 희토류 계열의 탈황제는 비록 황화수소와의 반응성이 떨어지더라도 황 수용 능력이 크고, 황회수 효율이 매우 높아 최근에 많은 관심을 받고 있으며, 그 중 란탄 계열 산화물과 그 혼합물들은 고온(600-850℃)에서 H2S 흡수제로서 높은 효율을 보이는 것으로 알려졌다.On the other hand, rare-earth-based desulfurizing agents have attracted much attention recently due to their high sulfur storage capacity and high sulfur recovery efficiency even though their reactivity with hydrogen sulfide is inferior. Among them, lanthanum series oxides and their mixtures have high temperature (600-850 ° C ) As a H 2 S absorbent.

이에, 본 발명자는 희토류 계열 원소를 이용하여 고온에서도 높은 내구성을 가짐과 동시에 높은 탈황 및 황회수 효율을 구현할 수 있는 복합 산화물 탈황제를 개발하기에 이르렀다.
Thus, the present inventors have developed a complex oxide desulfurizing agent that can achieve high desulfurization and sulfur recovery efficiency while having high durability even at high temperatures by using a rare earth element.

상기와 같은 문제점을 해결하기 위하여, 본 발명은 기존의 고온건식 탈황제의 문제점인 내구성 저하를 해결하여 고온에서도 높은 내구성을 가짐과 동시에 높은 탈황 및 황회수 효율을 구현할 수 있는 복합 산화물 탈황제 및 그 제조방법을 제공하는 것을 목적으로 한다.
In order to solve the above problems, the present invention provides a complex oxide desulfurizing agent capable of achieving high desulfurization and sulfur recovery efficiency while having high durability at high temperature by solving the problem of durability which is a problem of existing high temperature dry desulfurizing agent, And to provide the above objects.

상기의 목적을 달성하기 위하여 본 발명은 Ce(cerium) 계 탈황제에 산화증진성분인 La(lanthanum)이 혼합된 것을 특징으로 하는 Ce-La 복합 산화물 탈황제를 제공한다. 이때, 상기 Ce(cerium)과 La(lanthanum)의 혼합은 공침법과 소성을 통하여 이루어지는 것이 바람직하며, 상기 Ce(cerium)과 La(lanthanum)의 원소비율(Ce/La)은 3:7~8:2인 것이 바람직하다. In order to accomplish the above object, the present invention provides a Ce-La complex oxide desulfurizing agent characterized in that Ce (cerium) based desulfurizing agent is mixed with La (lanthanum) as an oxidation promoting component. Preferably, Ce (cerium) and La (lanthanum) are mixed by coprecipitation and firing, and the Ce / La ratio of Ce (cerium) and La (lanthanum) is 3: 7 to 8 : 2 is preferable.

또한, 상기 Ce-La 복합 산화물 탈황제는 150~300㎛의 입도를 가지도록 분쇄되어 사용하는 것이 바람직하며, 600~850℃의 고온에서 높은 효율의 H2S 흡수제로서 작용하며, 산화분위기에서도 탈황성능이 유지 또는 증진되는 것을 특징으로 한다.The Ce-La composite oxide desulfurizing agent is preferably pulverized to have a particle size of 150 to 300 탆. The desulfurizing agent acts as a high-efficiency H 2 S absorbent at a high temperature of 600 to 850 ° C., Is maintained or promoted.

한편, 상기 Ce-La 복합 산화물 탈황제는 Ce(cerium) 전구체 용액과 La(lanthanum) 전구체 용액을 제조하는 제1 단계, 상기 Ce 전구체 용액과 La 전구체 용액을 혼합하여 전구체 혼합용액을 생성하는 제2 단계, 상기 전구체 혼합용액에 수산화암모늄(NH4OH)을 pH 8~13이 되도록 첨가하여 침전물 슬러리를 생성하는 제3 단계, 상기 침전물 슬러리를 여과하여 건조시킨 후 소성하여, Ce-La 복합 산화물입자를 생성하는 제4단계를 통하여 제조할 수 있다. The Ce-La complex oxide desulfurizer includes a first step of preparing a Ce (cerium) precursor solution and a La (lanthanum) precursor solution, a second step of mixing the Ce precursor solution and a La precursor solution to form a precursor mixture solution, A third step of adding ammonium hydroxide (NH 4 OH) to the precursor mixture solution so as to have a pH of 8 to 13 to produce a slurry of the precipitate; filtering and drying the slurry to precipitate the Ce-La composite oxide particles; And a second step of reacting the compound of formula

이때, 상기 Ce(cerium)과 La(lanthanum)의 원소비율(Ce/La)은 3:7~8:2가 되도록 조절되는 것이 바람직하며, 상기 제4단계에서, 상기 침전물 슬러리를 110~130℃에서 건조시킨 후, 700~900℃에서 2~4시간 동안 소성하는 것이 바람직하며, 상기 제4단계 후에, 150~300㎛의 입도를 가지도록 분쇄되는 단계를 추가로 포함할 수 있다.
At this time, it is preferable that the Ce / La ratio of Ce (cerium) to La (lanthanum) is controlled to be 3: 7 to 8: 2. In the fourth step, And then calcined at 700 to 900 ° C. for 2 to 4 hours. After the fourth step, it may be further pulverized to have a particle size of 150 to 300 μm.

본 발명의 Ce-La 복합 산화물 탈황제는 종래의 탈황 흡수제보다 높은 온도(600~850 ℃)에서도 높은 내구성을 가짐과 동시에 산화분위기에서도 높은 탈황 및 황회수 효율을 구현할 수 있다. 따라서 본 발명의 Ce-La 복합 산화물 탈황제는 이미 상용화된 습식 탈황 기술 보다 에너지 손실이 적어 소요되는 비용 및 시간을 절감할 수 있을 뿐만 아니라 바이오 매스의 가스화와 통합 석탄 가스화 복합 사이클(IGCC) 및 중질유 개질 공정 등의 연료 전환 공정의 성공적인 개발에 기여할 수 있다.
The Ce-La composite oxide desulfurizing agent of the present invention has high durability even at a temperature (600 to 850 ° C) higher than that of the conventional desulfurization absorbent, and can achieve high desulfurization and sulfur recovery efficiency even in an oxidizing atmosphere. Therefore, the Ce-La complex oxide desulfurizing agent of the present invention can reduce the cost and time required because the energy loss is less than that of the wet desulfurization technology that has been already commercialized. In addition, it can be used for gasification of biomass, integrated coal gasification combined cycle (IGCC) And can contribute to the successful development of the fuel conversion process such as the process.

도 1 - 본 발명의 실시예들을 이용하여 산화 기체가 포함되어 있지 않은 혼합기체(H2/N2/H2S)를 대상으로 실험한 H2S 파과 곡선
도 2 - 본 발명의 실시예들을 이용하여 산화 기체가 포함되어 있지 않은 혼합기체(H2/N2/H2S)를 대상으로 실험한 H2S 흡수량 비교 그래프
도 3 - 본 발명의 실시예들을 이용하여 산화 기체가 포함된 혼합기체(H2/N2/H2S)를 대상으로 실험한 H2S 파과 곡선
도 4 - 본 발명의 실시예들을 이용하여 산화 기체가 포함된 혼합기체(H2/N2/H2S)를 대상으로 실험한 H2S 흡수량 비교 그래프
Figure 1 - H 2 S breakthrough curves for a mixed gas (H 2 / N 2 / H 2 S) containing no oxidizing gas using the embodiments of the present invention
FIG. 2 is a graph showing the H 2 S absorption capacity of a mixed gas (H 2 / N 2 / H 2 S) containing no oxidizing gas using the embodiments of the present invention
Figure 3 - H 2 S breakthrough curves for a mixed gas (H 2 / N 2 / H 2 S) containing an oxidizing gas using the embodiments of the present invention
FIG. 4 is a graph showing the H 2 S absorption capacity of a mixed gas (H 2 / N 2 / H 2 S) containing an oxidizing gas, according to an embodiment of the present invention

이하, 본 발명의 Ce-La 복합 산화물 탈황제 및 그 제조방법의 일 실시예를 첨부된 도면을 참조하여 설명한다. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the Ce-La composite oxide desulfurizing agent of the present invention and a method for producing the same will be described with reference to the accompanying drawings.

본 발명의 Ce-La 복합 산화물 탈황제는 Ce(cerium)계 탈황제에 산화증진성분인 La(lanthanum)이 혼합되어 종래의 탈황 흡수제보다 고온에서도 높은 내구성을 가짐과 동시에 높은 탈황 및 황회수 효율을 구현하는 것을 특징으로 한다. The Ce-La composite oxide desulfurizing agent of the present invention is a Ce-La composite oxide desulfurizing agent which is mixed with Ce (cerium) type desulfurizing agent La (lanthanum) as an oxidation promoting component and has high durability at a higher temperature than the conventional desulfurizing absorbent, .

상기 Ce(cerium)과 La(lanthanum)의 혼합은 공침법과 소성을 통하여 이루어지는 것을 특징으로 하며, 구체적으로 Ce-La 복합 산화물 탈황제 본 발명의 Ce(cerium) 전구체 용액과 La(lanthanum) 전구체 용액을 제조하는 제1 단계, 상기 Ce 전구체 용액과 La 전구체 용액을 혼합하여 전구체 혼합용액을 생성하는 제2 단계, 상기 전구체 혼합용액에 수산화암모늄(NH4OH)을 pH 8~13이 되도록 첨가하여 침전물 슬러리를 생성하는 제3 단계, 및 상기 침전물 슬러리를 여과하여 건조시킨 후 소성하여, Ce-La 복합 산화물입자를 생성하는 제4단계를 통하여 제조할 수 있다. The cerium (Ceerium) precursor solution and the La (lanthanum) precursor solution of the present invention are mixed with each other by a coprecipitation method and a calcination method. Specifically, A second step of mixing the Ce precursor solution and the La precursor solution to produce a precursor mixture solution; adding ammonium hydroxide (NH 4 OH) to the precursor mixture solution so as to have a pH of 8 to 13, And a fourth step of filtering and drying the precipitate slurry followed by calcination to produce Ce-La composite oxide particles.

이를 상세히 살펴보면, 먼저 Ce 전구체와 La 전구체를 증류수에 투입하여 완전히 용해될 때까지 교반하고, 완전히 용해된 뒤에는 NH4OH 용액을 천천히 투입하여 침전을 유도하고, 용액의 pH가 8~13이 되면 NH4OH의 투입을 중지한다. 이때, Ce(cerium)과 La(lanthanum)의 원소비율(Ce/La)은 다양하게 조절할 수 있으나 고온 및 산화 분위기 등 다양한 조건에서도 높은 탈황효율을 구현하기 위해서는 3:7~8:2의 원소비율을 가지도록 조절하는 것이 바람직하다. In detail, the Ce precursor and the La precursor are first added to distilled water and stirred until completely dissolved. After completely dissolved, the NH 4 OH solution is slowly added to induce precipitation. When the pH of the solution is 8 to 13, 4 Stop the supply of OH. At this time, the element ratio (Ce / La) of Ce (cerium) and La (lanthanum) can be controlled in various ways. However, in order to realize high desulfurization efficiency under various conditions such as high temperature and oxidizing atmosphere, And the like.

상기 침전된 슬러리는 중력에 의하여 상분리를 유도한 뒤 윗면의 맑은 용액은 취하여 제거하고 가압 필터링 장치에서 남은 액체를 제거한 후, 110~130℃에서 건조시킨 다음 최종적으로 700~900℃에서 2~4시간 동안 소성한다. The precipitated slurry is subjected to phase separation by gravity, and then the clear solution on the upper surface is removed to remove the remaining liquid from the pressurizing filter, dried at 110 to 130 ° C, and finally dried at 700 to 900 ° C for 2 to 4 hours Lt; / RTI >

상기 소성된 Ce-La 복합 산화물 탈황제는 높은 탈황 효율을 구현하기 위하여 150-300 μm의 입도로 분쇄하여 사용되는 것이 바람직하며, 본 발명에 따라 제조된 탈황제는 종래의 탈황제와 달리 600~850℃의 고온에서도 높은 탈황 효율을 구현할 수 있다. It is preferable that the calcined Ce-La complex oxide desulfurizing agent is pulverized to a particle size of 150-300 μm in order to realize a high desulfurization efficiency. The desulfurizing agent produced according to the present invention is preferably used at a temperature of 600 to 850 ° C. High desulfurization efficiency can be realized even at a high temperature.

또한, 일반적인 Ce계 산화물(CeO2) 탈황제가 산화분위기에서 탈황성능이 크게 떨어지는데 반해, 본 발명의 Ce-La 복합 산화물 탈황제는 La 성분(La2O3)에 의하여 산화분위기에서도 탈황 성능이 유지될 뿐만 아니라 오히려 증진되는 결과를 얻을 수 있다. In addition, while the desulfurization performance of a Ce-based oxide (CeO 2 ) desulfurizing agent is greatly deteriorated in an oxidizing atmosphere, the desulfurizing performance of the Ce-La composite oxide desulfurizing agent of the present invention is maintained by the La component (La 2 O 3 ) Not only that, you can get a boost.

즉, 본 발명의 Ce-La 복합 산화물 탈황제는 Ce 성분이 La 성분의 전체적인 탈황성능을 증진시킴과 동시에, La 성분이 산화분위기 및 고온에서의 탈황성능을 증진시켜 탈황제의 내구성을 높이고 소요 비용과 시간을 절감하는 효과를 가지는 것을 특징으로 한다.That is, in the Ce-La composite oxide desulfurizing agent of the present invention, the Ce component improves the total desulfurization performance of the La component, and the La component improves the desulfurization performance in the oxidizing atmosphere and at high temperature to increase the durability of the desulfurizing agent, Of the present invention.

이하에서는, 본 발명의 일 실시예에 따른 Ce-La 복합 산화물 탈황제 및 그 제조방법의 실시예 및 실험예를 상세히 살펴본다. 본 발명의 범주가 이하의 바람직한 실시 예에 한정되는 것은 아니며, 당업자라면 본 발명의 권리범위 내에서 본 명세서에 기재된 내용의 여러 가지 변형된 형태를 실시할 수 있다.
Hereinafter, the Ce-La composite oxide desulfurizing agent according to an embodiment of the present invention and the method for producing the same will be described in detail. It is to be understood that the scope of the present invention is not limited to the following preferred embodiments, and those skilled in the art can implement various modifications of the present invention within the scope of the present invention.

[실시예 1] 실시예 비교예의 제조 [Example 1] Examples and Comparative Examples prepared

1) 산화물의 제조방법은 용액법이 도입되었으며, 다른 전이금속이 도입될 경우와 비교를 용이하게 하기 위하여 Ce과 전이금속의 전구체를 nitrate 형태로 고정시켰다. 1) The solution method was adopted for the preparation of oxides, and the precursors of Ce and transition metals were fixed in nitrate form to facilitate comparison with other transition metals.

2) 먼저, 실시예 1을 제조하기 위하여, Ce(NO3)2-H2O를 증류수에 투입하여 완전히 용해될 때까지 교반하였다. 상기 Ce(NO3)2-H2O가 완전히 용해된 뒤에는 NH4OH 용액(28 wt%, Junsei)를 천천히 투입하여 침전을 유도하였으며, 용액의 pH가 8~13이 되면 NH4OH의 투입을 중지하였다.2) First, to prepare Example 1, Ce (NO 3 ) 2 -H 2 O was added to distilled water and stirred until completely dissolved. After the Ce (NO 3 ) 2 -H 2 O was completely dissolved, NH 4 OH solution (28 wt%, Junsei) was slowly added to induce precipitation. When the pH of the solution reached 8~13, NH 4 OH .

상기 침전물 슬러리는 중력에 의한 상분리를 유도한 뒤 윗면의 맑은 용액은 취하여 제거하고 가압 필터링 장치에서 액체를 제거한 후, 120℃에서 건조시켰다. 이후, 건조되어 얻어진 고형물을 furnace에 넣고 800℃에서 3시간 동안 소성하였으며, 소성된 탈황제는 분쇄 과정을 통해 150-300 μm의 입도를 가지도록 하였다. The precipitate slurry was subjected to phase separation by gravity, followed by removal of the clear solution from the upper surface, removal of the liquid from the pressure filtering apparatus, and drying at 120 ° C. Thereafter, the dried solid material was placed in a furnace and calcined at 800 ° C for 3 hours. The sintered desulfurizer was pulverized to have a particle size of 150-300 μm.

3) Ce(NO3)2-H2O를 증류수에 투입시 La(NO3)3-6H2O를 정해진 원소비율로 동시에 투입하여, 실시예 1과 동일한 방법으로 실시예 2~7을 제조하였다. 3) Ce (NO 3 ) 2 -H 2 O was added to distilled water, La (NO 3 ) 3 -6H 2 O was simultaneously added at a predetermined element ratio to prepare Examples 2 to 7 in the same manner as in Example 1 Respectively.

4) Ce(NO3)2-H2O 대신에 La(NO3)3-6H2O를 증류수에 투입하여 실시예 1과 동일한 방법으로 실시예 8을 제조하였다. 4) Ce (NO 3) 2 NO (La 2 O 3 in place of -H) was prepared in a 3 -6H Example 8 in the same manner as in Example 1 and the input 2 O in distilled water.

5) 상기에서 설명한 바와 같이, Ce 단독, Ce-La 복합산화물, La 단독 형태로 총 8개의 시료(실시예 1~8)를 제조하였으며, 구체적인 원소구성비를 하기 표 1에 나타내었다. (하기 표에서 Ce100는 pure CeO2, Ce70La30은 70mol% of CeO2 + 70mol% of CeO2 La100는 pure La2O3를 의미한다.)5) As described above, a total of 8 samples (Examples 1 to 8) were prepared in the form of Ce alone, Ce-La composite oxide and La alone, and specific element composition ratios are shown in Table 1 below. (In the following Table Ce100 are pure CeO 2, Ce70La30 is a 70mol% of CeO 2 + 70mol% of CeO 2 La100 means pure La 2 O 3. )

순번turn Ce (mol%)Ce (mol%) La (mol%)La (mol%) 시료명Name of sample 실시예 1Example 1 100100 -- Ce100Ce100 실시예 2Example 2 55 9595 Ce5La95Ce5La95 실시예 3Example 3 1010 9090 Ce10La90Ce10La90 실시예 4Example 4 2020 8080 Ce20La80Ce20La80 실시예 5Example 5 3030 7070 Ce30La70Ce30La70 실시예 6Example 6 5050 5050 Ce50La50Ce50La50 실시예 7Example 7 7070 3030 Ce70La30Ce70La30 실시예 8Example 8 -- 100100 La100La100

<탈황제 원소구성비율와 시료명>
<Desulfurization element composition ratio and sample name>

[실시예 2] 실시예 비교예의 탈황실험 [Example 2] Desulfurization experiments of Examples and Comparative Examples

상기 표1의 실시예들을 H2/N2/H2S 혼합기체에서 황화반응을 측정한 결과, 도 1, 2에 나타난 바와 같이 Ce70La30 흡수제가 가장 좋은 H2S 흡수율이 나타난 것을 확인하였다. As a result of the measurement of the sulfidation reaction in the H 2 / N 2 / H 2 S mixed gas of the examples shown in Table 1, it was confirmed that the Ce 2 La 3 absorbent showed the best H 2 S absorption as shown in FIGS. 1 and 2.

또한, 상기 표1의 실시예들을 H2/N2/H2S 혼합기체에서 황화반응을 측정한 결과, 도 3,4에 나타난 바와 같이 본 발명의 Ce-La 복합 산화물 탈황제는 산화분위기에서도 탈황 성능이 유지될 뿐만 아니라 오히려 증진되는 결과를 얻을 수 있다는 것을 확인하였다.
As a result of measuring the sulfidation reaction in the H 2 / N 2 / H 2 S mixed gas of the examples of Table 1, the Ce-La complex oxide desulfurizing agent of the present invention, as shown in FIGS. 3 and 4, It is confirmed that not only the performance is maintained but also the improvement result is obtained.

상기 실시예에서도 볼 수 있듯이 본 발명의 Ce-La 복합 산화물 탈황제는 종래의 탈황 흡수제보다 고온에서도 높은 내구성을 가짐과 동시에 산화분위기에서도 높은 탈황 및 황회수 효율을 구현할 수 있어, 습식 탈황 기술 보다 소요되는 비용 및 시간을 절감할 수 있다.As can be seen from the above examples, the Ce-La composite oxide desulfurizing agent of the present invention has high durability even at a higher temperature than a conventional desulfurization absorbent and can realize a high desulfurization and sulfur recovery efficiency even in an oxidizing atmosphere, Cost and time can be saved.

본 발명은 상술한 특정의 실시예 및 설명에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능하며, 그와 같은 변형은 본 발명의 보호 범위 내에 있게 된다. The present invention is not limited to the above-described specific embodiments and descriptions, and various modifications can be made to those skilled in the art without departing from the gist of the present invention claimed in the claims. And such modifications are within the scope of protection of the present invention.

Claims (10)

Ce(cerium) 계 탈황제에 산화증진성분인 La(lanthanum)이 혼합된 것을 특징으로 하는 Ce-La 복합 산화물 탈황제.La complex oxide desulfurizing agent characterized in that Ce (cerium) based desulfurizing agent is mixed with La (lanthanum) as an oxidation promoting component. 제1항에 있어서,
상기 Ce(cerium)과 La(lanthanum)의 혼합이 공침법과 소성을 통하여 이루어지는 것을 특징으로 하는 Ce-La 복합 산화물 탈황제.
The method according to claim 1,
Characterized in that the Ce (cerium) and La (lanthanum) are mixed by coprecipitation and calcination.
제1항에 있어서,
상기 Ce(cerium)과 La(lanthanum)의 원소비율(Ce/La)가 3:7~8:2인 것을 특징으로 하는 Ce-La 복합 산화물 탈황제.
The method according to claim 1,
The Ce-La complex oxide desulfurizing agent is characterized in that the element ratio (Ce / La) of Ce (cerium) to La (lanthanum) is 3: 7 to 8: 2.
제1항에 있어서,
150~300㎛의 입도를 가지도록 분쇄되는 것을 특징으로 하는 Ce-La 복합 산화물 탈황제.
The method according to claim 1,
Wherein the Ce-La composite oxide desulfurizing agent is pulverized to have a particle size of 150 to 300 mu m.
제1항에 있어서,
600~850℃의 고온에서 H2S 흡수제로서 작용하는 것을 특징으로 하는 Ce-La 복합 산화물 탈황제.
The method according to claim 1,
Wherein said Ce-La complex oxide desulfurizing agent acts as an H 2 S absorbent at a high temperature of 600 to 850 ° C.
제1항에 있어서,
산화분위기에서도 탈황성능이 유지 또는 증진되는 것을 특징으로 하는 Ce-La 복합 산화물 탈황제.
The method according to claim 1,
Wherein the desulfurization performance is maintained or improved even in an oxidizing atmosphere.
Ce(cerium) 전구체 용액과 La(lanthanum) 전구체 용액을 제조하는 제1 단계;
상기 Ce 전구체 용액과 La 전구체 용액을 혼합하여 전구체 혼합용액을 생성하는 제2 단계;
상기 전구체 혼합용액에 수산화암모늄(NH4OH)을 pH 8~13이 되도록 첨가하여 침전물 슬러리를 생성하는 제3 단계; 및
상기 침전물 슬러리를 여과하여 건조시킨 후 소성하여, Ce-La 복합 산화물입자를 생성하는 제4단계;
를 포함하는 Ce-La 복합 산화물 탈황제의 제조방법.
Ce (cerium) precursor solution and La (lanthanum) precursor solution;
A second step of mixing the Ce precursor solution and the La precursor solution to produce a precursor mixture solution;
A third step of adding ammonium hydroxide (NH 4 OH) to the precursor mixture solution so as to have a pH of 8 to 13 to produce a slurry of precipitates; And
A fourth step of filtering and drying the precipitate slurry and then firing to produce Ce-La composite oxide particles;
Wherein the Ce-La composite oxide desulfurizing agent is a Ce-La composite oxide.
제7항에 있어서,
상기 Ce(cerium)과 La(lanthanum)의 원소비율(Ce/La)이 3:7~8:2가 되도록 조절되는 것을 특징으로 하는 Ce-La 복합 산화물 탈황제의 제조방법.
8. The method of claim 7,
Wherein the Ce (La) ratio between the Ce (cerium) and La (lanthanum) is controlled to be 3: 7 to 8: 2.
제7항에 있어서,
상기 제4단계에서, 상기 침전물 슬러리를 110~130℃에서 건조시킨 후, 700~900℃에서 2~4시간 동안 소성하는 것을 특징으로 하는 Ce-La 복합 산화물 탈황제의 제조방법.
8. The method of claim 7,
Wherein the precipitate slurry is dried at 110 to 130 ° C. and then calcined at 700 to 900 ° C. for 2 to 4 hours in the fourth step.
제7항에 있어서,
상기 제4단계 후에, 150~300㎛의 입도를 가지도록 분쇄되는 단계를 추가로 포함하는 것을 특징으로 하는 Ce-La 복합 산화물 탈황제의 제조방법.
8. The method of claim 7,
The method for producing a desulfurizing agent for Ce-La complex oxide according to claim 1, further comprising the step of grinding the Ce-La composite oxide to have a particle size of 150 to 300 탆 after the fourth step.
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