Synthesis of Titanium Ion Sieves and Its Application for Lithium Recovery from Artificial Indonesian Geothermal Brine

煅烧 卤水 烘烤 原材料 马弗炉 材料科学 氧化钛 二氧化钛 金红石 化学工程 无机化学 矿物学 核化学 冶金 化学 催化作用 有机化学 工程类
作者
I. Wayan Christ Widhi Herman Tangkas,Vincent Sutresno Hadi Sujoto,Widi Astuti,Siti Nurul Aisyiyah Jenie,Ferian Anggara,Andhika Putera Utama,Himawan Tri Bayu Murti Petrus,Sutijan
出处
期刊:Journal of Sustainable Metallurgy [Springer Nature]
卷期号:9 (2): 613-624 被引量:10
标识
DOI:10.1007/s40831-023-00664-7
摘要

Indonesia is one of the countries in the world that has been utilizing geothermal as a renewable energy source to generate electricity. Depending on the geological setting, geothermal brine possesses critical elements worthwhile to extract. One of the critical elements is lithium which is interesting in being processed as raw material for the battery industries. This study thoroughly presented titanium oxide material for lithium recovery from artificial geothermal brine and the effect of Li/Ti mole ratio, temperature, and solution pH. The precursors were synthesized using TiO2 and Li2CO3 with several variations of the Li/Ti mole ratio mixed at room temperature for 10 min. The mixture of 20 g of raw materials was put into a 50 mL crucible and then calcined in a muffle furnace. The calcination temperature in the furnace was varied to 600, 750, and 900 °C for 4 h with a heating rate. of 7.55 °C/min. After the synthesis process, the precursor is reacted with acid (delithiation). Delithiation aims to release lithium ions from the host Li2TiO3 (LTO) precursor and replace it with hydrogen ions through an ion exchange mechanism. The adsorption process lasted for 90 min, and the stirring speed was 350 rpm on a magnetic stirrer with temperature variations of 30, 40, and 60 °C and pH values of 4, 8, and 12. This study has shown that synthetic precursors synthesized based on titanium oxide can absorb lithium from brine sources. The maximum recovery obtained at pH 12 and a temperature of 30 °C was 72%, with the maximum adsorption capacity obtained was 3.55 mg Li/gr adsorbent. Shrinking Core Model (SCM) kinetics model provided the most fitted model to represent the kinetics model (R2 = 0.9968), with the constants kf, Ds, and k, are 2.2360 × 10-9 cm/s; 1.2211 × 10-13 cm2/s; and 1.0467 × 10-8 cm/s.
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