Production of hydrogen from methanol over Cu/ZnO and Cu/ZnO/Al2O3 catalysts prepared by homogeneous precipitation: Steam reforming and oxidative steam reforming

Pencarian berdasarkan :

SEMUA Pengarang Subjek ISBN/ISSN Pencarian Spesifik

Pencarian terakhir:

e-journal

Production of hydrogen from methanol over Cu/ZnO and Cu/ZnO/Al2O3 catalysts prepared by homogeneous precipitation: Steam reforming and oxidative steam reforming

Tetsuya Shishido - Nama Orang; Katsuomi Takehira - Nama Orang; Yoshihiro Yamamoto - Nama Orang; Hiroyuki Morioka - Nama Orang;

Abstract.
Two series of Cu/ZnO and Cu/ZnO/Al2O3 catalysts with varying Cu/Zn ratio have been prepared by the homogeneous precipitation (hp) method using urea hydrolysis. Steam reforming and oxidative steam reforming of methanol were performed using the hp-Cu/Zn-based catalysts for catalytic production of hydrogen. The hp-Cu/ZnO/Al2O3 catalyst showed a higher activity than the hp-Cu/ZnO catalysts. In both cases, the catalytic activity was well correlated with the surface area of Cu metal, and the maximum activity was obtained on the hp-Cu/ZnO/Al2O3 catalyst with the Cu/Zn ratio of 1/1. Although a large amount of Cu+ was detected on the surface of the Cu/Zn-based catalysts after the reduction at 260 ◦C, no obvious correlation was observed between the activity and the surface amount of Cu+. The hp-Cu/ZnO/Al2O3 catalyst showed a high and stable activity not only for steam reforming but also for oxidative steam reforming of methanol, and the latter reaction effectively produced H2 with a low CO selectivity at a low temperature around 200 ◦C. It was confirmed by the temperature-programmed desorption experiments that CH3OH was first dehydrogenated to HCHO, which then underwent a nucleophilic attack of H2O to form HCOOH, followed by the decomposition to H2 and CO2
on the hp-Cu/Zn-based catalysts.

Keywords: Hydrogen production; Steam reforming; Methanol; Cu/ZnO/Al2O3 catalyst; Homogeneous precipitation

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri: Journal of Molecular Catalysis A: Chemical
No. Panggil: -
Penerbit: London : Elsevier B.V.., 2007
Deskripsi Fisik: Journal of Molecular Catalysis A: Chemical 268 (2007) 185–194
Bahasa: English
ISBN/ISSN: -
Klasifikasi: -
Tipe Isi: -
Tipe Media: -
Tipe Pembawa: -
Edisi: -
Subjek: KIMIA
Info Detail Spesifik: -
Pernyataan Tanggungjawab: agus

Versi lain/terkait

Tidak tersedia versi lain

Lampiran Berkas

Production of hydrogen from methanol over Cu/ZnO and Cu/ZnO/Al2O3 catalysts prepared by homogeneous precipitation: Steam reforming and oxidative steam reforming

Komentar

Anda harus masuk sebelum memberikan komentar