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.com
Volume 7
Innovative Energy & Research
ISSN: 2576-1463
Advanced Energy Materials 2018
August 13-14, 2018
August 13-14, 2018 | Dublin, Ireland
20
th
International Conference on
Advanced Energy Materials and Research
Innov Ener Res 2018, Volume 7
DOI: 10.4172/2576-1463-C1-003
Combinedoxidation of methane to synthesis gas
Dossumov K.1, Yergaziyeva G2, Myltykbayeva L3 and Telbayeva M4
1Al-Farabi Kazakh National University, Kazakhstan
2,3,4The Institute of Combustion Problems, Kazakhstan
B
iogas is a promising source of hydrocarbons capable of providing the current and future needs of mankind for energy and
hydrocarbon feedstocks [1]. The main components of biogas obtained in anaerobic bioreactors are methane and carbon
dioxide, as impurities can contain carbon monoxide and oxygen [2]. Biogas obtained in this way can be converted to synthesis
gas by dry (CH
4
+ CO
2
) or steam reforming (CH
4
+ H
2
O) using appropriate catalysts [3-5]. In the present work, a modified
nickel catalyst supported on alumina was used as catalysts for the combined oxidation of methane. Experiments on testing
the efficiency of catalysts were carried out on an automated flow catalytic unit (PKU-1). The reaction products were identified
chromatographically on a device of "CHROMOS GC-1000" . The figure shows the results of the effect of promoting additions
of lanthanum (La
2
O
3
), molybdenum (MoO
3
) and cerium (CeO
2
) oxides on the catalytic activity of the nickel catalyst in the
combined methane oxidation reaction involving oxygen, carbon dioxide and water vapor, under process conditions: CH
4
:
CO
2
: O2: H
2
O = 2: 2: 1: 0.5, Tr = 850° C and W = 1000 h
-1
. As can be seen from the figure, the promotion of nickel catalyst
with cerium, lanthanum or molybdenum oxides results in an increase in the activity and selectivity of nickel catalyst. The
highest activity and selectivity of the nickel catalyst is observed when oxides of cerium and molybdenum are promoted. On
the promoted 3% NiO-1% MoO
3
/ Al
2
O
3
catalyst, the selectivity for hydrogen was 66%, for carbon monoxide 47%. At the
same time, the concentration of H2 reaches 52 vol. %, CO up to 33.9 vol. % and methane conversion 95%. For a catalyst of
3% NiO-1% CeO
2
/Al
2
O
3
, the selectivity for hydrogen is 50% and for carbon monoxide 60%. In this case, the concentration of
H
2
obtained reaches 41 vol.%, CO up to 42.8 vol.% and methane conversion 98%. Thus, the activity and selectivity of oxide-
supported nickel-containing catalysts promoted by MoO
3
, CeO
2
and La
2
O
3
oxides during methane reforming into synthesis
gas was tested. It is determined that the promotion of nickel catalyst with cerium or molybdenum oxides leads to an increase
in the selectivity and activity of the catalysts for the desired products.
dossumov50@mail.ru