Promoting light hydrocarbons yield by catalytic hydrodechlorination of residual chloromethanes using palladium supported on zeolite catalysts
Entity
UAM. Departamento de Ingeniería QuímicaPublisher
M D P I AGDate
2020-02-01Citation
10.3390/catal10020199
Catalysts 10.2 (2020): 199
ISSN
2073-4344DOI
10.3390/catal10020199Funded by
Authors gratefully acknowledge financial support from FEDER/Ministerio de Ciencia, Innovación y Universidades—Agencia Estatal de Investigación/ CTM2017-85498-R. C. Fernández Ruiz acknowledges MINECO for his research grantProject
Gobierno de España. CTM2017-85498-REditor's Version
https://doi.org/10.3390/catal10020199Subjects
Dichloromethane; Hydrodechlorination; Olefins; Palladium; Paraffins; Trichloromethane; Zeolites; QuímicaRights
© 2020 by the authorsAbstract
Gas catalytic hydrodechlorination (HDC) of trichloromethane (TCM) and dichloromethane (DCM) was analyzed using Pd (1 wt.%) on different zeolites as catalysts. The aim of this study was to know the surface properties of the catalysts and reaction conditions that promote the yield to light hydrocarbons in this reaction. Five different zeolite supports were used from three commercial zeolites (KL, L-type; NaY, Faujasite; H-MOR, Mordenite). KL and NaY were submitted to ionic exchange treatments in order to increase their acidity and analyze the effect of the acidity in the activity and selectivity of the HDC reaction. Exchanged zeolites (HL and HY) showed the highest Pd dispersion due to their higher surface acidity. The best TCM/DCM conversion and selectivity to light hydrocarbons was obtained using the two non-exchanged zeolite-catalysts, KL and NaY. Low surface acidity seems to be the key aspect to promote the formation of light hydrocarbons. The formation of these products is favored at high reaction temperatures and low H2: chloromethane ratios. KL showed the highest selectivity to olefins (60%), although with a lower dechlorination degree. Non-exchanged NaY catalyst showed high selectivity to paraffins (70% and 95% for the HDC of DCM and TCM, respectively)
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Google Scholar:Fernandez-Ruiz, Carlos
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Bedia García-Matamoros, Jorge
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Grau, Javier Mario
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Romero, Ana Clara
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Rodríguez, Daniel
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Rodríguez Jiménez, Juan José
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Gómez Sainero, Luisa María
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