e-journal

Oxidation of CH4 over Pd supported on TiO2-doped SiO2: Effect of Ti(IV) loading and influence of SO2

---

Abstract.
Titania-modified silicas with different weight% of TiO2 were prepared by sol–gel method and used as
supports for Pd (1 wt%) catalysts. The obtained materials were tested in the oxidation of methane under
lean conditions in absence and in presence of SO2. Test reactions were consecutively performed in order
to evaluate the thermal stability and poisoning reversibility. Increasing amounts of TiO2 improved the
catalytic activity, with an optimum of the performance for 10 wt% TiO2 loading. Moreover, the titaniacontaining
catalysts exhibited a superior tolerance towards SO2 by either adding it to the reactants or
feeding it as a pure pretreatment atmosphere at 350 8C. Catalysts were characterized by XPS, XRD, FT-IR
and BET measurements. According to the structural and surface analyses, the mixed oxides contained Si–
O–Ti linkages which were interpreted as being responsible for the enhanced intrinsic activity of
supported PdO with respect to PdO on either pure SiO2 or pure TiO2. Moreover, the preferential
interaction of the sulfur molecule with TiO2 and the easy SOx desorption from high surface area silica
were the determining factors for the superior SO2 tolerance of the TiO2-doped catalysts.

Keywords: Methane combustion, TiO2/SiO2 supports, PdO catalyst, SO2 effect

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Applied Catalysis B: Environmental

No. Panggil

-

Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Catalysis B: Environmental 88 (2009) 430–437

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar