Methylation of Benzene by Methane-13C over Zeolitic Catalysts at 400 .degree.C

Further evidence for the oxidative methylation of benzene with methane over zeolite catalysts

“…Chromatograph, Shimadzu Model GC-8A equipped with a thermal conductivity detector (TCD) and a Zeolite A packed column (2 m x 3 mm), was used at 100 ºC for the detection and separation of CH 4 and any CO, CO 2 , O 2 , H 2 and N 2 .…”

“…benzene, toluene, phenol) which model petroleum, coal and liquefaction residue structures. The methylation of benzene with methane over zeolite catalysts in both high pressure flow reactor [5] and batch reactor [4] has also been reported. However, the high pressure flow reactor study [5] demonstrated, through the use of 13 C labelled methane, that the methyl groups in the methylated aromatic products did not originate from the methane reactant.…”

“…For example, the direct methylation of naphthalene, toluene and phenol with methane over various metal-substituted aluminophosphate molecular sieves in a high pressure batch reactor has been reported [1,2]. Other investigations [3,4] have also demonstrated the incorporation of methane in the presence of Cu-beta, H-beta and CuZSM-5 into various organic substrates (e.g. benzene, toluene, phenol) which model petroleum, coal and liquefaction residue structures.…”

Green chemistry perspectives of methane conversion via oxidative methylation of aromatics over zeolite catalysts

“…[21][22][23][24][25][26][27][28][29][30][31][32] For example, the direct methylation of naphthalene, toluene and phenol with methane over aluminophosphate molecular sieves in a high pressure batch reactor has been demonstrated. 21,22 More recent batch reaction investigations 25,26 have also revealed the incorporation of methane in the presence of Cu-beta, H-beta and CuZSM-5 into a variety of organic substrates (eg. benzene, toluene, phenol) which model petroleum, coal and liquefaction residue structures.…”

Advanced Catalysts Based on Micro‐ and Mesoporous Molecular Sieves for the Conversion of Natural Gas to Fuels and Chemicals

“…An alternative high-pressure catalytic route for the alkylation of aromatics with methane was proposed by a number of researchers [15,16], employing molecular sieves as catalysts, a high excess of CH 4 , and high pressure (typically >4 MPa), at temperatures of 400-500 • C, in a batch reactor configuration. Though initially this high-pressure reaction was considered nonoxidative, later on, systematic works by Adebajo et al [17][18][19] highlighted the crucial role of oxygen, unintentionally introduced in the autoclaves during the reactant feeding, in the reaction mechanism.…”