Article
  • Preparation and Characterization of Solid Reducing Agent Using a PVA Binder

  • Ho Young Jung, Jun Youn Sohn*, Sun Gyun Roh**, Min Hwa Lim, and Jeong Sun Sohn***,†

  • Department of Environment and Energy Engineering, Chonnam National University, Gwangju 61186, Korea
    *Department of Bioenvironmental & Chemical Engineering, Chosun College of Science & Technology, Gwangju 61453, Korea
    **Department of Fire Service Administration, Honam University, Gwangju 62399, Korea
    ***Division of Undeclared Majors, College of General Education, Chosun University, Gwangju 61452, Korea

  • PVA 바인더를 이용한 고형환원제 제조 및 특성연구

  • 정호영 · 손준연* · 노선균** · 임민화 · 손정선***,†

  • 전남대학교 환경에너지공학과, *조선이공대학교 생명환경화공과, **호남대학교 소방행정학과, ***조선대학교 기초교육대학 자유전공학부

Abstract

In this study, a solid reducing agent, a spherical porous composite structure for hydrogen fluoride (HF) removal, was prepared. First, SiO2 as a support and Ca(OH)2 were introduced to prepare a CaO/SiO2 mixture, and poly(vinyl alcohol) (PVA) having various molecular weights was used as a binder to prepare solid reducing agents having various compositions. Thermal properties, morphology, compressive strength, specific surface area, and pore characteristics were investigated according to their compositions. The optimized compressive strength, the specific surface area and porosity were observed for the solid reducing agent (60-2PVA50K) using 2 wt% of PVA having a weight average molecular weight of 31000 to 50000 as a binder in a mixture having a CaO concentration of 60 wt%. The introduction of the binder is expected to increase the specific surface area and improve the adsorption characteristics while suppressing the formation of powder of the solid reducing agent.


본 연구에서는 불화수소(HF) 제거를 위한 구형 다공성 복합구조체인 고형환원제를 제조하였다. 먼저 지지체로 SiO2와 Ca(OH)2를 도입하여 CaO/SiO2 혼합물을 제조한 후, 바인더로 다양한 분자량을 갖는 폴리(비닐 알코올) (PVA)을 이용하여 여러 가지 조성으로 고형환원제를 제조하고 이들의 조성에 따른 열적특성, 모폴로지, 압축강도, 비표면적특성 및 기공특성을 조사하였다. CaO의 농도가 60 wt%인 혼합물에 바인더로 중량평균분자량이 31000~50000인 PVA를 2 wt% 사용한 고형환원제(60-2PVA50K)의 경우 압축강도, 비표면적 및 기공도가 최적화되는 것을 확인하였다. 바인더의 도입은 고형환원제가 분말화되는 것을 억제하면서 비표면적을 크게 하여 흡착특성을 향상시킬 수 있을 것으로 기대된다


Keywords: calcium hydroxide, calcium oxide, hydrophobic silica, binder, composite

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2019; 43(3): 379-386

    Published online May 25, 2019

  • 10.7317/pk.2019.43.3.379
  • Received on Jan 9, 2019
  • Revised on Feb 8, 2019
  • Accepted on Feb 20, 2019

Correspondence to

  • Jeong Sun Sohn

  • Division of Undeclared Majors, College of General Education, Chosun University, Gwangju 61452, Korea

  • E-mail: jss4347@chosun.ac.kr