Lee
Catalytic Fast Pyrolysis of Cellulose Using Nano Zeolite and Zeolite/Matrix Catalysts in a GC/Micro-Pyrolyzer
catalyst is approached to that of pyrolysis only. This means
that if the ability of a catalyst like the HM/Clay catalyst is
not sufficient, the result obtained is roughly similar to that
of pyrolysis only, as high sugar and low ring compounds
content in product distribution.
and also naphthalene groups, as valuable products with-
out oxygen. This can be concluded that the particle size
of catalyst, as well as the zeolite type in the catalytic fast
pyrolysis of cellulose were keys to controlling the distri-
bution of product yields.
On the other hand, in a comparison of both the
zeolite/clay catalyst (Table V) and pure zeolite catalyst
(Table IV), the distribution of product yields over HY/Clay
(0.1, 1.6) and pure HY (0.1, 1.6) has a slight difference
in low molecular products, furan groups, ring compounds
and sugars. HY/Clay catalysts, compared to pure HY cat-
alyst, consists of 80 wt% zeolite content and 20 wt% clay
content. Although the content of zeolite in the zeolite/clay
catalyst is lowered and also the HY/Clay catalyst has much
less surface area than pure HY catalyst (Table III), the
performance of the catalyst in both pure zeolite and zeo-
lite/clay catalysts does not clearly differ. In the case of
pure HY (0.1) and HY/Clay (0.1) catalysts with a small
particle size, HY/Clay (0.1) catalyst with low zeolite con-
tent and also low BET surface area produces rather a
higher fraction of volatile products, little more mono-ring
products and less furan groups than those of pure HY (0.1)
catalyst, although mono-ring products mainly occur from
the zeolite effect. This means that the clay with mesopore
in zeolite/clay catalyst is a little role at fast pyrolysis of
cellulose with large molecular weight. Thus, the support
like clay must be also well controlled in the prearation of
mixing catalyst to have the adequate cracking of reactant
with large molecular weight and also to lower the price
of catalyst. Although the particle size and zeolite type in
both zeolite and zeolite/clay catalysts are key factors in
catalytic fast pyrolysis of large molecular.
Acknowledgments: This work was partially conducted
under the framework of Research and Development Pro-
gram of the Korea Institute of Energy Research(KIER)
(B4-2434-02).
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4. CONCLUSIONS
Catalytic fast pyrolysis of cellulose using zeolite and zeo-
lite/matrix catalysts in a GC/pyrolyzer was investigated.
The catalysts were prepared into different particle size with
0.1 and 1.6 mm diameter, respectively. Catalytic pyroly-
sis had high fraction of volatile products and little con-
tent of sugars with high molecular weight, compared to
those of pyrolysis only. In catalytic pyrolysis, more volatile
products was produced, according to decrease the particle
size of the catalyst, and also the zeolite type gave much
more influence on the distribution of product yields than
the matrix. Among the catalysts used, HZSM-5 catalyst
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Received: 9 October 2014. Accepted: 20 November 2014.
J. Nanosci. Nanotechnol. 16, 4631–4637, 2016
4637