Citation: SHU Qing, HOU Xiao-peng, ZHU Li-hua, SHEN Bang-po, MA Fei, WANG Jin-fu. Preparation of a novel solid acid catalyst SO₄^2-/Nd₂O₃/C and study of its performance for the synthesis of biodiesel from esterification reaction of oleic acid and methanol[J]. Journal of Fuel Chemistry and Technology, ;2016, 44(02): 209-216. shu

Preparation of a novel solid acid catalyst SO₄^2-/Nd₂O₃/C and study of its performance for the synthesis of biodiesel from esterification reaction of oleic acid and methanol

SHU Qing ^1,2,, ,
HOU Xiao-peng ¹ ,
ZHU Li-hua ¹ ,
SHEN Bang-po ¹ ,
MA Fei ¹ ,
WANG Jin-fu ²

1.
1. School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2.
2. Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Corresponding author: SHU Qing,
Received Date: 17 September 2015
Available Online: 26 November 2015
Fund Project: 国家自然科学基金(21206062,21466013) (21206062,21466013)江西省自然科学(青年)基金计划重大项目(20143ACB21018) (青年)基金计划重大项目(20143ACB21018)化学工程联合国家重点实验室(清华大学)开放课题基金(SKL-chE-14A04) (清华大学)开放课题基金(SKL-chE-14A04)国家民委化学工程与技术重点实验室(北方民族大学)开放课题基金和国家级大学生创新训练项目(201410407004)资助. (北方民族大学)开放课题基金和国家级大学生创新训练项目(201410407004)

A carbon material was prepared from the high temperature carbonization of waste camellia seed shell in a fluidized bed tubular reactor.The carbon material was applied as the catalyst support to prepare a new catalyst SO₄^2-/Nd₂O₃/C after it was simultaneously modified by Nd³⁺ and sulfonated by concentrated sulfuric acid through impregnation method.The catalyst was characterized by several physical and chemical characterization methods.The catalytic activity and reusability of SO₄^2-/Nd₂O₃/C were evaluated using it to catalyze the esterification of methanol and oleic acid for the synthesis of biodiesel.Results showed that the conversion of oleic acid was 96.70% when the methanol/oleic acid molar ratio was 2:1,reaction temperature was 90℃,and catalyst/reactants was 2% under reflux condensation for 120 min.After recycling of three times,the conversion of oleic acid was still 86.74%.High activity can be explained as follows:the electro-negativity of Nd is 1.14,which is smaller than O(3.44) and S(2.58),so it will provide lone electron pair to the empty 2p orbit of O and S,resulting in the formation of a stable coordination bond between Nd³⁺ and SO₄^2-.In addition,S=O double bond can induce a strong electron withdrawing effect,which can increase the electrostatic field of Nd³⁺ when it was coordinated with SO₄^2-.And finally,it should be noticed that H₂O is a strong ligand.Hence,SO₄^2-/Nd₂O₃/C exhibited a strong Br nsted acidity when H₂O existed in the reaction medium.
- biodiesel,
- Nd³⁺ and sulfuric acid modification,
- carbon-based solid acid,
- esterification,
- coordination bond
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沈阳化工大学材料科学与工程学院沈阳 110142

Preparation of a novel solid acid catalyst SO42-/Nd2O3/C and study of its performance for the synthesis of biodiesel from esterification reaction of oleic acid and methanol

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通讯作者: 陈斌, bchen63@163.com

Preparation of a novel solid acid catalyst SO₄^2-/Nd₂O₃/C and study of its performance for the synthesis of biodiesel from esterification reaction of oleic acid and methanol