TY - JOUR
T1 - On the synthesis of LaCl3 catalysts for oxidative chlorination of methane
AU - Peringer, Elvira
AU - Tejuja, Chirag
AU - Salzinger, Michael
AU - Lemonidou, Angeliki A.
AU - Lercher, Johannes A.
N1 - Funding Information:
The authors thank X. Hecht for BET measurements and M. Neukamm for SEM and EDX measurements. Thanks go also to A. Kastenmüller of the Institute of electron microscopy of Technischen Universität München for TEM measurements. The authors are also grateful to T. Tafelmeier and U. Ammari of the microanalytical laboratory at Technischen Universität München for determining the carbon content by CHN analysis. Partial financial support by The Dow Chemical Company is gratefully acknowledged.
PY - 2008/11/30
Y1 - 2008/11/30
N2 - LaCl3 is an active and selective catalyst for oxidative chlorination of methane to methyl chloride, generated in situ by chlorination from LaOCl. The latter is prepared by precipitation of La(OH)2Cl and subsequent calcination. The synthesis route was modified by using different bases in order to synthesize high surface area LaOCl catalyst precursors. Ammonium hydroxide and the organic bases tetraethylammonium hydroxide, tetrapropylammonium hydroxide, and tetrabutylammonium hydroxide are used as precipitating agents. The marked increase of the specific surface area by using organic bases indicates also that they may act as templating agents. After chlorination the specific surface areas of pure LaOCl samples decrease drastically, lanthanum carbonate, however, acts as structural promoter stabilizing the specific surface area during chlorination.
AB - LaCl3 is an active and selective catalyst for oxidative chlorination of methane to methyl chloride, generated in situ by chlorination from LaOCl. The latter is prepared by precipitation of La(OH)2Cl and subsequent calcination. The synthesis route was modified by using different bases in order to synthesize high surface area LaOCl catalyst precursors. Ammonium hydroxide and the organic bases tetraethylammonium hydroxide, tetrapropylammonium hydroxide, and tetrabutylammonium hydroxide are used as precipitating agents. The marked increase of the specific surface area by using organic bases indicates also that they may act as templating agents. After chlorination the specific surface areas of pure LaOCl samples decrease drastically, lanthanum carbonate, however, acts as structural promoter stabilizing the specific surface area during chlorination.
KW - Hypochlorite anion
KW - LaCl
KW - LaOCl
KW - Methane
KW - Oxidative chlorination
KW - Template synthesis
UR - http://www.scopus.com/inward/record.url?scp=53549123262&partnerID=8YFLogxK
U2 - 10.1016/j.apcata.2008.08.009
DO - 10.1016/j.apcata.2008.08.009
M3 - Article
AN - SCOPUS:53549123262
SN - 0926-860X
VL - 350
SP - 178
EP - 185
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
IS - 2
ER -