Back to results
US 5,492,832 AGranted
Very low temperature ashing (VLTA)
OwnerAhmed R. Shiraziinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerAhmed R. Shiraziinventor
Estimating the term…
A method and system for Very Low Temperature Ashing (VLTA). In one embodiment, there is provided a method of ashing solid fuel or combusted or partly combusted fuel or any organic and inorganic matrix which contains minerals in a furnace with a partial pressure less than atmospheric pressure including the step of mixing of oxygen and helium with a total pressure less than the atmospheric pressure and producing a plasma in which the mineral components in the samples are not being affected essentially, wherein the proportion of the gas mixture achieve a surface temperature not exceeding 150.degree. C. on the sample. In an alternative embodiment, there is provided a method of ashing solid fuel or combusted or partly combusted fuel or any organic and inorganic matrix which contains minerals in a surface with a plasma including the step of regulating the proportion between oxygen and helium by a reduction of oxygen content, wherein the surface temperature shall not exceed 150.degree. C. and the temperature being controlled during the entire ashing procedure.
A method of ashing solid fuel or combusted or partly combusted fuel or any organic and inorganic matrix which contains minerals in a furnace with a partial pressure less than atmospheric pressure comprising the steps of providing a mixture of oxygen and helium with a total pressure less than the atmospheric pressure and producing a plasma in which the mineral components in the samples are not being affected essentially, wherein the proportion of the gas mixtures achieve a surface temperature not exceeding 150.degree. C. on the sample.
A method of ashing solid fuel or combusted or partly combusted fuel or any organic and inorganic matrix which contains minerals in a furnace with a plasma comprising the step of regulating a proportion between an oxygen and helium mixture by a reduction of oxygen content, wherein the surface temperature shall not exceed 150.degree. C. and the said temperature being controlled during the entire ashing procedure.
Dependencies are inferred from the claim text.