[논문]NiCl2 첨착된 흡착제 상에서 암모니아의 흡착 및 재생 특성

임정현; 송강; 박주식; 김영호

doi:10.14478/ace.2022.1014

NiCl2 첨착된 흡착제 상에서 암모니아의 흡착 및 재생 특성
Adsorption and Regeneration Characteristics of Ammonia on NiCl2 Impregnated Adsorbents 원문보기

공업화학 = Applied chemistry for engineering, v.33 no.2, 2022년, pp.202 - 209

임정현 (충남대학교 응용화학공학과) , 송강 (충남대학교 응용화학공학과) , 박주식 (한국에너지기술연구원) , 김영호 (충남대학교 응용화학공학과)

초록
AI-Helper

암모니아에 대한 흡착 성능 향상을 목적으로 NiCl₂ 첨착에 적합한 지지체 및 NiCl₂의 첨착량이 암모니아 흡착능에 미치는 영향을 연구하였다. NiCl₂는 초음파 조사 하에서 여러 지지체의 표면 위로 첨착하였으며, NiCl₂가 첨착된 흡착제의 물리화학적 특성 및 암모니아 흡착 성능을 관찰하였다. 다양한 지지체들 중, 가장 넓은 비표면적을 갖는 활성탄위로 NiCl₂를 첨착했을 때, 암모니아의 흡착능이 가장 우수한 것으로 나타났다. 활성탄 위로 NiCl₂의 첨착량을 변화시킨 결과, 2 mmol·g^-1을 첨착한 NiCl₂(2.0)/AC 흡착제가 5.977 mmol·g^-1의 가장 우수한 암모니아 흡착 용량을 나타냈다. 또한 저온 열을 이용할 수 있는 조건하 5회의 반복 순환 시험에서 흡착 용량이 거의 일정한 수준으로 유지됨을 나타내어 흡착제의 재생 능력이 우수함을 알 수 있었다.

Abstract ▼ AI-Helper

Effects of the support and amount of NiCl2 on ammonia adsorption capacity were investigated to improve the ammonia adsorption performance. NiCl2 was impregnated onto the surface of various supports under ultrasonic irradiation. The physicochemical properties and ammonia adsorption performance of NiCl2-impregnated adsorbents were investigated. Among the various supports, it was found that the adsorption capacity of ammonia was the best when NiCl2 was impregnated on activated carbon (AC) with the highest specific surface area. As a result of changing the amount of NiCl2 impregnated on AC, the NiCl2(2.0)/AC adsorbent impregnated with 2 mmol·g-1 of NiCl2 showed the highest ammonia adsorption capacity of 5.977 mmol·g-1. In addition, the adsorption capacity was found to be maintained at an almost constant level in five repeated cycle tests under the condition that low-temperature heat could be utilized. This indicates that the adsorbent has excellent regeneration ability.

주제어

표/그림 (11)

표 Table 1. Nomenclature of Prepared Adsorbents
그림 Figure 1. Schematic diagram of the experimental apparatus for the ammonia adsorption.
그림 Figure 2. SEM images of the supports and NiCl₂-impregnated adsorbents.
그림 Figure 3. SEM and EDS mapping images of the NiCl₂-impregnated activated carbons.
표 Table 2. Textural Properties of the Adsorbents
그림 Figure 4. XRD patterns of samples: (a) AC, (b) NiCl₂(2.0)/AC, (c) NiCl₂(5.4)/AC, and (d) NiCl₂.
그림 Figure 5. NH₃-TPD profiles of samples: (a) supports, and (b) NiCl₂-impregnated activated carbons.
그림 Figure 6. Breakthrough curves of the samples: (a) various supports, and (b) NiCl₂-impregnated adsorbents.
그림 Figure 7. Breakthrough curves of activated carbons impregnated with different amount of NiCl₂.
그림 Figure 8. Regeneration performance of NiCl₂(2.0)/AC.
표 Table 3. The Ammonia Adsorption Capacity and Breakthrough Time of the Adsorbents

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