Journal
ACS CATALYSIS
Volume 7, Issue 5, Pages 3510-3520Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.7b00057
Keywords
acetylene hydrochlorination; ionic liquids; catalytic mechanism; HCl adsorption; Ru@IL/AC catalyst
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Funding
- National Basic Research Program of China [2012CB720302]
- Natural Science Foundation of China [21576205]
- NSFC [21621004]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_15R46]
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We synthesized a series of Ru@IL/AC catalysts using the incipient wetness impregnation technique associated with five kinds of ionic liquids, aiming to explore an efficient nonmercuric catalyst for the acetylene hydrochlorination reaction. Over the optimal 1%Ru@15%TPPB/AC catalyst, the acetylene conversion was maintained at 99.7% at 48 h (T = 170 degrees C, GHSV(C2H2) = 360 h(-1), and V-HCl/V-C2H2 = 1.15). Additionally, with lower Ru loading (0.2%Ru@15%TPPB/AC), the acetylene conversion still remained at 99.3% within 400 h. Characterized by CO pulse chemisorption, TEM, XPS, TGA, among other methods, it is indicated that TPPB IL could effectively improve the dispersion of Ru species, suppress the reduction of active Ru species, and inhibit the coke deposition during the acetylene hydrochlorination reaction. The interactive mechanism between TPPB and the reactants and the product was investigated to disclose the effect of TPPB IL on the catalytic performance of Ru-based catalyst, in combination with DFT calculations. The enhanced activity and long-term stability of Ru@IL/AC suggest the promising industrial application as the nonmercuric catalyst for acetylene hydrochlorination.
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