High-yield hydrogen production by steam gasification of Hypercoal (ash-free coal extract) with potassium carbonate: comparison with raw coal
- National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan). Energy Technology Research Institute
Steam gasification of the HyperCoals (ash-free coal extracts) with the physical addition of 5.8%-6.0% K{sub 2}CO{sub 3} was conducted at 1023 K on a thermogravimetric apparatus that was equipped with an on-line quadrupole mass spectrometer. The catalytic gasification of the HyperCoals demonstrated a much higher gasification rate than the catalytic gasification of the raw coals. Interactions of K{sub 2}CO{sub 3} with mineral matter in the raw coal formed water-insoluble potassium compounds, such as potassium aluminosilicates, and reduced the catalytic activity, whereas no such negative reactions occurred for the HyperCoals. The steam gasification of the HyperCoals with K{sub 2}CO{sub 3} was also determined to be favorable for the high-yield production of hydrogen. From these experimental results, the catalytic steam gasification of HyperCoal would potentially be a more efficient process for the production of hydrogen in the future. 30 refs., 6 figs., 2 tabs.
- OSTI ID:
- 20674545
- Journal Information:
- Energy and Fuels, Vol. 19, Issue 5; Other Information: ou-k@aist.go.jp; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
Similar Records
Structural characteristics and gasification reactivity of chars prepared from K{sub 2}CO{sub 3} mixed HyperCoals and coals
Effect of steam partial pressure on gasification rate and gas composition of product gas from catalytic steam gasification of HyperCoal