TY - JOUR
T1 - Role of Recrystallization in Alkaline Treatment on the Catalytic Activity of 1-Butene Epoxidation
AU - Zuo, Yi
AU - Yang, Liqian
AU - Jiang, Xiao
AU - Ma, Mengtong
AU - Wang, Yanli
AU - Liu, Min
AU - Song, Chunshan
AU - Guo, Xinwen
N1 - Funding Information:
This work was financially supported by the National Key Research and Development Program of China (2016YFB0301704), the National Natural Science Foundation of China (21506021), the Fundamental Research Funds for the Central Universities (DUT19LK61), and the Program of Innovative and Entrepreneurial Talent of Jiangsu, China. X.J. Acknowledges support from the Center for Understanding and Control of Acid Gas‐Induced Evolution of Materials for Energy (UNCAGE‐ME), an Energy Frontier Research Center funded by U.S. Department of Energy, Office of Science, Basic Energy Sciences.
PY - 2020/12/16
Y1 - 2020/12/16
N2 - Two alkylol amines, which were ethanolamine (EOA) and triethanolamine (TEOA), were used to posttreat nanosized titanium silicalite-1 (TS-1) to improve its catalytic activity for 1-butene epoxidation. Comparative studies were conducted to clarify the influences of the EOA and TEOA concentrations on the physicochemical properties through detailed characterization. EOA treatment can dissolve the framework Si, [SiO4], on the external surface of TS-1, generating some macropores. TEOA serves as structure-directing agent to form MFI topology other than the dissolution of [SiO4], and promotes the recrystallization of [SiO4], forming new TS-1 particles over the external surface. The two treatments can both improve the catalytic activity of 1-butene epoxidation, but the samples treated with TEOA exhibit better catalytic stability. This can be attributed to the characteristic recrystallization of [SiO4] in the case of TEOA treatment, stabilizing the structure of TS-1 and maintaining more framework Ti and intercrystal space.
AB - Two alkylol amines, which were ethanolamine (EOA) and triethanolamine (TEOA), were used to posttreat nanosized titanium silicalite-1 (TS-1) to improve its catalytic activity for 1-butene epoxidation. Comparative studies were conducted to clarify the influences of the EOA and TEOA concentrations on the physicochemical properties through detailed characterization. EOA treatment can dissolve the framework Si, [SiO4], on the external surface of TS-1, generating some macropores. TEOA serves as structure-directing agent to form MFI topology other than the dissolution of [SiO4], and promotes the recrystallization of [SiO4], forming new TS-1 particles over the external surface. The two treatments can both improve the catalytic activity of 1-butene epoxidation, but the samples treated with TEOA exhibit better catalytic stability. This can be attributed to the characteristic recrystallization of [SiO4] in the case of TEOA treatment, stabilizing the structure of TS-1 and maintaining more framework Ti and intercrystal space.
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U2 - 10.1002/cctc.202001480
DO - 10.1002/cctc.202001480
M3 - Article
AN - SCOPUS:85093976386
VL - 12
SP - 6196
EP - 6204
JO - ChemCatChem
JF - ChemCatChem
SN - 1867-3880
IS - 24
ER -