1-Butanol synthesis from ethanol over strontium phosphate hydroxyapatite catalysts with various Sr/P ratios

Shuhei Ogo, Ayumu Onda, Yukina Iwasa, Kenji Hara, Atsushi Fukuoka, Kazumichi Yanagisawa

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

Strontium phosphate hydroxyapatites (Sr-HAP) with various Sr/P molar ratios were synthesized under hydrothermal conditions. X-ray photoelectron spectroscopy revealed a close correlation between the near-surface and bulk Sr/P molar ratios of catalyst samples. Sr-HAP catalysts show high 1-butanol selectivity in the gas-phase conversion of ethanol. Sr-HAP catalysts with higher Sr/P molar ratios showed higher catalytic activity and 1-butanol selectivity. The density of both relatively strong basic sites and acidic sites was seen to increase with increasing Sr/P molar ratios, though the basic site density was significantly higher than the acidic site density. The rate-determining step in ethanol conversion over Sr-HAP catalysts was considered to be the dimerization process, as aldol condensation is mainly accelerated by base catalysis, which would explain why the Sr-HAP catalysts with higher basic site density showed higher catalytic activity and 1-butanol selectivity.

Original languageEnglish
Pages (from-to)24-30
Number of pages7
JournalJournal of Catalysis
Volume296
DOIs
Publication statusPublished - 2012 Dec
Externally publishedYes

Fingerprint

Hydroxyapatites
1-Butanol
Strontium
Durapatite
Butenes
Hydroxyapatite
strontium
phosphates
Phosphates
Ethanol
ethyl alcohol
Catalyst selectivity
catalysts
Catalysts
synthesis
selectivity
catalytic activity
Catalyst activity
Dimerization
dimerization

Keywords

  • 1-Butanol
  • Basic site density
  • Ethanol
  • Hydroxyapatite
  • Phosphate
  • Strontium

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

1-Butanol synthesis from ethanol over strontium phosphate hydroxyapatite catalysts with various Sr/P ratios. / Ogo, Shuhei; Onda, Ayumu; Iwasa, Yukina; Hara, Kenji; Fukuoka, Atsushi; Yanagisawa, Kazumichi.

In: Journal of Catalysis, Vol. 296, 12.2012, p. 24-30.

Research output: Contribution to journalArticle

Ogo, Shuhei ; Onda, Ayumu ; Iwasa, Yukina ; Hara, Kenji ; Fukuoka, Atsushi ; Yanagisawa, Kazumichi. / 1-Butanol synthesis from ethanol over strontium phosphate hydroxyapatite catalysts with various Sr/P ratios. In: Journal of Catalysis. 2012 ; Vol. 296. pp. 24-30.
@article{961b0bc3b57f4b689a910b289e361479,
title = "1-Butanol synthesis from ethanol over strontium phosphate hydroxyapatite catalysts with various Sr/P ratios",
abstract = "Strontium phosphate hydroxyapatites (Sr-HAP) with various Sr/P molar ratios were synthesized under hydrothermal conditions. X-ray photoelectron spectroscopy revealed a close correlation between the near-surface and bulk Sr/P molar ratios of catalyst samples. Sr-HAP catalysts show high 1-butanol selectivity in the gas-phase conversion of ethanol. Sr-HAP catalysts with higher Sr/P molar ratios showed higher catalytic activity and 1-butanol selectivity. The density of both relatively strong basic sites and acidic sites was seen to increase with increasing Sr/P molar ratios, though the basic site density was significantly higher than the acidic site density. The rate-determining step in ethanol conversion over Sr-HAP catalysts was considered to be the dimerization process, as aldol condensation is mainly accelerated by base catalysis, which would explain why the Sr-HAP catalysts with higher basic site density showed higher catalytic activity and 1-butanol selectivity.",
keywords = "1-Butanol, Basic site density, Ethanol, Hydroxyapatite, Phosphate, Strontium",
author = "Shuhei Ogo and Ayumu Onda and Yukina Iwasa and Kenji Hara and Atsushi Fukuoka and Kazumichi Yanagisawa",
year = "2012",
month = "12",
doi = "10.1016/j.jcat.2012.08.019",
language = "English",
volume = "296",
pages = "24--30",
journal = "Journal of Catalysis",
issn = "0021-9517",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - 1-Butanol synthesis from ethanol over strontium phosphate hydroxyapatite catalysts with various Sr/P ratios

AU - Ogo, Shuhei

AU - Onda, Ayumu

AU - Iwasa, Yukina

AU - Hara, Kenji

AU - Fukuoka, Atsushi

AU - Yanagisawa, Kazumichi

PY - 2012/12

Y1 - 2012/12

N2 - Strontium phosphate hydroxyapatites (Sr-HAP) with various Sr/P molar ratios were synthesized under hydrothermal conditions. X-ray photoelectron spectroscopy revealed a close correlation between the near-surface and bulk Sr/P molar ratios of catalyst samples. Sr-HAP catalysts show high 1-butanol selectivity in the gas-phase conversion of ethanol. Sr-HAP catalysts with higher Sr/P molar ratios showed higher catalytic activity and 1-butanol selectivity. The density of both relatively strong basic sites and acidic sites was seen to increase with increasing Sr/P molar ratios, though the basic site density was significantly higher than the acidic site density. The rate-determining step in ethanol conversion over Sr-HAP catalysts was considered to be the dimerization process, as aldol condensation is mainly accelerated by base catalysis, which would explain why the Sr-HAP catalysts with higher basic site density showed higher catalytic activity and 1-butanol selectivity.

AB - Strontium phosphate hydroxyapatites (Sr-HAP) with various Sr/P molar ratios were synthesized under hydrothermal conditions. X-ray photoelectron spectroscopy revealed a close correlation between the near-surface and bulk Sr/P molar ratios of catalyst samples. Sr-HAP catalysts show high 1-butanol selectivity in the gas-phase conversion of ethanol. Sr-HAP catalysts with higher Sr/P molar ratios showed higher catalytic activity and 1-butanol selectivity. The density of both relatively strong basic sites and acidic sites was seen to increase with increasing Sr/P molar ratios, though the basic site density was significantly higher than the acidic site density. The rate-determining step in ethanol conversion over Sr-HAP catalysts was considered to be the dimerization process, as aldol condensation is mainly accelerated by base catalysis, which would explain why the Sr-HAP catalysts with higher basic site density showed higher catalytic activity and 1-butanol selectivity.

KW - 1-Butanol

KW - Basic site density

KW - Ethanol

KW - Hydroxyapatite

KW - Phosphate

KW - Strontium

UR - http://www.scopus.com/inward/record.url?scp=84868683074&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84868683074&partnerID=8YFLogxK

U2 - 10.1016/j.jcat.2012.08.019

DO - 10.1016/j.jcat.2012.08.019

M3 - Article

AN - SCOPUS:84868683074

VL - 296

SP - 24

EP - 30

JO - Journal of Catalysis

JF - Journal of Catalysis

SN - 0021-9517

ER -