Catalytic conversion of formic acid into methanol in subcritical hydrothermal conditions

Mingbo Hu, Fangming Jin, Cuixian Ma, Hongjuan Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Efforts were made to explore the potentiality that formic acid gives a conversion into methanol by applying metallic catalysts in subcritical hydrothermal conditions. The subcritical hydrothermal conversion of formic acid into methanol was carried out by using Zn as a reductant and Ni as a catalyst. The effect of various experimental parameters, e.g., the amount of Zn (Ni), Zn/Ni ratio, temperature, pressure, reaction time and filling rate etc. was investigated. The conclusion showed that the highest methanol yield of 11.95% was achieved under proper conditions which was certified in the experiment that Zn/Ni ratio of 1:1.3, temperature of 180, reaction time of 12 hours, filling rate of 35%. Nickel, as one of transition metals, was effective catalyst in the hydrothermal conversion of formic acid into methanol. The reaction time was extended unavoidably with relatively low temperature. It can be expected that reaction time could have farther reduction with the increase of temperature. Additionally, the hydrothermal reaction can also occur without the addition of reductant and catalysts. According to the analysis of GC-TCD(thermal conductivity detector), H2 and CO2 were detected. It was supposed that formic acid gave a quick decomposition into H2 and CO2 initially and then the reaction of methanol synthesis occurred and the reaction of H2 and CO2 was proved existing through the observation of changes of H2 and CO2 amount. However, methanol can also be obtained through reducing formic acid with H2 as reductant. Based on present experimental analysis, it can be determined that the former reaction path has its priority. It is not sure that whether formic acid was directly reduced into methanol by H2.

Original languageEnglish
Title of host publication2nd International Symposium on Aqua Science, Water Resource and Low Carbon Energy
Pages238-241
Number of pages4
DOIs
Publication statusPublished - 2010 Dec 1
Event2nd International Symposium on Aqua Science, Water Resource and Low Carbon Energy - Sanya, China
Duration: 2009 Dec 72009 Dec 10

Publication series

NameAIP Conference Proceedings
Volume1251
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other2nd International Symposium on Aqua Science, Water Resource and Low Carbon Energy
CountryChina
CitySanya
Period09/12/709/12/10

Keywords

  • Hydrothermal conversion
  • Metal catalyst
  • Methanol
  • Reaction path
  • Reductant

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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