Details

Autor(en) / Beteiligte

• Li, Hui
• Niu, Sheng-li
• Lu, Chun-mei
• Cheng, Shi-qing

Titel

The stability evaluation of lime mud as transesterification catalyst in resisting CO sub(2) and H sub(2)O for biodiesel production

Ist Teil von

• Energy conversion and management, 2015-01, Vol.103, p.57-65

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The most outstanding property of the heterogeneous transesterification catalysts is recyclable, but their catalytic activity may be depressed for the absorption of moisture (H sub(2)O) and carbon dioxide (CO sub(2)) in air, especially for the basic ones. Lime mud (LM) is effective in catalyzing transesterification, yet its property in resisting H sub(2)O and CO sub(2) is indistinct, which should be emphasized. In this study, the LM based transesterification catalyst is prepared through calcinations. Then, it is hydrated and desiccated to simulate the contamination by H sub(2)O and CO sub(2). Further, the fresh and the contaminated catalysts are characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), Hammette indicator, Brunauer-Emmett-Teller (BET) surface area and soluble alkali examination, to reveal the mechanism of LM in resisting H sub(2)O and CO sub(2). Meanwhile, the analytical grade calcium oxide (CaO) is chosen for comparison. Finally, to comprehensively investigate the influences of H sub(2)O and CO sub(2) on LM in catalyzing transesterification, the factors of the catalyst addition percentage, molar ratio of methanol to oil and transesterification temperature are evaluated.