The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 2014
Filed:
Oct. 26, 2012
Kyei-sing Kwong, Albany, OR (US);
James P. Bennett, Salem, OR (US);
Jinichiro Nakano, Albany, OR (US);
Kyei-Sing Kwong, Albany, OR (US);
James P. Bennett, Salem, OR (US);
Jinichiro Nakano, Albany, OR (US);
U.S. Department of Energy, Washington, DC (US);
Abstract
The disclosure provides methods of operating a slagging gasifier using a carbon feedstock having a relatively high VOto SiOratio, such as petcoke. The disclosure generates a combined chemical composition in the feed mixture having less than 25 wt. % SiO, greater than 20 wt. % VO, and greater than 20 wt. % CaO. The method takes advantage of a novel recognition that increased levels of SiOtend to decrease dissolution of the VOwhich forms under the reducing conditions of the gasifier, and utilizes the CaO additive to establish a chemical phase equilibria comprised of lower melting compounds. The method further provides for control based on the presence of AlOand FeO, and provides for a total combined chemical composition of greater than about 5 wt. % MgO for use with refractory linings comprised of MgO based refractory brick.