Research Paper
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This study aims to recover lithium ion in shale gas produced water which was synthesized in laboratoryreferring to composition of produced water of Marcellus shale area. The adsorbent used for recovering lithium in produced water was H2TiO3 which was synthesized with Li2CO3 and TiO2. The lithium adsorptive capacity was observed with changing pH of produced water and using NaHCO3 as buffer to fix the pH of produced water. Without using buffer, the adsorptive capacity was very low and the adsorptive capacity increased with increase in pH of produced water. By adding buffer, the adsorptive capacity increased to maximum adsorptive capacity of 23.6 mg/g. It is, however, lower than the theoretical maximum capacity due to high TDS concentration in the produced water.
이 연구에서는 티타늄 기반의 흡착제를 합성하여 셰일가스 생산수 중 리튬을 회수하고자 하였다. 셰일가스 생산수는 미국 Marcellus 지역의 생산수 조성에 따라 실험실에서 합성하여 사용하였으며, 흡착제는 Li2CO3와 TiO2를 이용해 합성하였다. 생성된 흡착제를 이용하여 pH의 변화 및 버퍼의 유무에 따른 리튬 흡착량 변화를 관찰하였다. 합성 셰일가스 생산수 용액 내 흡착제의 반응속도 등 흡착 메커니즘을 이해하기 위하여 kinetic 실험과 등온흡착 실험 또한 진행하였다. 실험 결과 아무것도 첨가하지 않은 생산수에서는 티타늄 기반 흡착제에 의한 반응이 거의 일어나지 않았으며, KOH 수용액을 이용해 pH를 증가시킬수록 리튬 흡착량이 늘어났다. NaHCO3 버퍼를 첨가하였을 때는 12.24 mg/g, NaHCO3버퍼와 KOH를 함께 첨가한 용액에서는 13.37 m/g의 흡착량을 보였다. 생산수의 최대 리튬 흡착량은 H2TiO3를 생산수 부피의 1 g/L로 첨가하여 진행한 실험에서 23.6 mg/g으로 나타났다. 그러나 합성된 흡착제의 흡착능은 생산수의 높은 TDS 로 인해 등온흡착 그래프에서 계산된 최대성능에 미치지 못하였다.
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- Publisher :The Korean Society of Mineral and Energy Resources Engineers
- Publisher(Ko) :한국자원공학회
- Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
- Journal Title(Ko) :한국자원공학회지
- Volume : 53
- No :5
- Pages :482-488
- DOI :https://doi.org/10.12972/ksmer.2016.53.5.482


Journal of the Korean Society of Mineral and Energy Resources Engineers







