Dimethyl carbonate synthesis over solid base catalysts derived from Ca–Al layered double hydroxides
- 17 Downloads
The Ca–Al oxide catalysts are prepared via thermal decomposition of Ca–Al layered double hydroxide precursors and characterized by XRD, TG, SEM, BET, CO2-TPD, Hammett indicators, XPS and ICP techniques. The obtained catalysts are then tested for transesterification of methanol with propylene carbonate (PC), highest dimethyl carbonate (DMC) yield of 59.9% has been reached with methanol: PC molar ratio of 12, catalysts weight of 2 wt% total reactants, and reaction time of 2 h. Research results show that though the transesterification occurs over various basic sites, the strong basic site has a leading role on transesterification, which is consistent with the activity results. The catalysts can be recycled and the reason for the decrease in catalytic activity is further discussed in detail.
KeywordsTransesterification Propylene carbonate Dimethyl carbonate Ca–Al layered double hydroxides Ca–Al solid base catalysts
This work was financially supported by Natural Science Foundation of Shanxi Province (No. 201601D102006) and the Key Science and Technology Program of Shanxi Province, China (MD2014-09, MD2014-10).
- Crocellà V, Tabanelli T, Vitillo JG, Costenaro D, Bisio C, Cavani F, Bordiga S (2017) A multi-technique approach to disclose the reaction mechanism of dimethyl carbonate synthesis over amino-modified SBA-15 catalysts. Appl Catal B 211:323–336. https://doi.org/10.1016/j.apcatb.2017.04.013 CrossRefGoogle Scholar
- Kumar P, Srivastava VC, Mishra IM (2015) Dimethyl carbonate synthesis via transesterification of propylene carbonate with methanol by ceria-zinc catalysts: role of catalyst support and reaction parameters. Korean J Chem Eng 32:1774–1783. https://doi.org/10.1007/s11814-015-0040-z CrossRefGoogle Scholar
- Lu Y, Jiang B, Fang L, Ling FL, Wu F, Hu BS, Meng FM, Niu KY, Lin F, Zheng HM (2017) An investigation of ultrathin nickel–iron layered double hydroxide nanosheets grown on nickel foam for high-performance supercapacitor electrodes. J Alloys Compd 714:63–70. https://doi.org/10.1016/j.jallcom.2017.04.197 CrossRefGoogle Scholar
- Tian JS, Miao CX, Wang JQ, Cai F, Du Y, Zhao Y, He LN (2007) Efficient synthesis of dimethyl carbonate from methanol, propylene oxide and CO2 catalyzed by recyclable inorganic base/phosphonium halide-functionalized polyethylene glycol. Green Chem 9:566–571. https://doi.org/10.1039/b614259a CrossRefGoogle Scholar
- Xu J, Wu HT, Ma CM, Xue B, Li YX, Cao Y (2013) Ionic liquid immobilized on mesocellular silica foam as an efficient heterogeneous catalyst for the synthesis of dimethyl carbonate via transesterification. Appl Catal A 464–465:357–363. https://doi.org/10.1016/j.apcata.2013.06.016 CrossRefGoogle Scholar
- Zhao TX, Hu XB, Wu DS, Li R, Yang GQ, Wu YT (2017) Direct synthesis of dimethyl carbonate from carbon dioxide and methanol at room temperature using imidazolium hydrogen carbonate ionic liquid as a recyclable catalyst and dehydrant. Chemsuschem 10:2046–2052. https://doi.org/10.1002/cssc.201700128 CrossRefGoogle Scholar