Investigation of nano-CuO/mesoporous SiO2 materials as hot gas desulphurization sorbents

Oǧuz Karvan*, Ahmet Sirkecioǧlu, Hüsnü Atakül

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


Gases from gasification processes contain H2S which is highly harmful for almost all catalyst materials and metal constructions such as in IGCC plants. Metal oxides and/or their admixtures are widely used for the removal of H2S from gases at high temperatures. These sorbents, however, suffer from several problems which adversely affect their performances. In this study, a new method was explored to prepare sorbents from nano-size (sub-micron) CuO supported on SiO2 materials. Three sorbents with 38.5 wt.%, 41.5 wt.% and 49.6 wt.% Cu contents were prepared and characterized. Results indicated that, the produced materials are mesoporous composite type materials of nano-size CuO and amorphous SiO2. The H2S adsorption characteristics of the prepared sorbents were studied in a laboratory scale fixed-bed reactor through sulfidation-regeneration cycles in the temperature range of 788-838 K at atmospheric pressure. The average sulfur uptake capacities of the sorbents, based on the breakthrough point H2S concentration of 20 ppm, were determined to be in the range of 2.38-2.91 g S/100 g sorbent after 3 cycles. Although the process at high temperatures appeared to disturb the structure of the sorbents to some extent, the drop in their sulfur adsorption capacities remained limited.

Original languageEnglish
Pages (from-to)1452-1458
Number of pages7
JournalFuel Processing Technology
Issue number12
Publication statusPublished - Dec 2009


The authors gratefully acknowledge the financial support from the State Planning Organization of Turkish Republic (project 98K121910) and Advanced Technologies in Engineering Projects (project # 90146). The authors also thank Çiğdem Çakır for her support during TEM studies.

FundersFunder number
State Planning Organization of Turkish Republic98K121910, 90146


    • Desulfurization
    • Hot gas
    • Mesoporous
    • Nano-CuO
    • Sorbent


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