Patents by Inventor Stephen David Swart

Stephen David Swart has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fluidised bed pyrolysis apparatus and method
    Patent number: 9580657
    Abstract: A carbonaceous feed pyrolysis apparatus is provided including two or more hot particle fluidized beds, and one or more positive displacement apparatus for the transfer of hot particles between two or more of the beds, wherein one or more of the fluidized beds contains a combustion zone. A bio-oil production process is also provided, including pyrolysis of a carbonaceous bio-mass using two or more fluidized beds, including a first combustion zone carried out in one or more combustion fluidized beds in which a particulate material is fluidized and heated, and a second pyrolysis zone carried out in one or more pyrolysis fluidized beds in which the hot particles heated in the combustion zone are used for pyrolysis of the bio-mass.
    Type: Grant
    Filed: September 8, 2011
    Date of Patent: February 28, 2017
    Assignees: University of Pretoria, The United States, as represented by the Secretary of Agriculture
    Inventors: Michael David Heydenrych, Stephen David Swart, Akwasi Acheampong Boateng
  • FLUIDISED BED PYROLYSIS APPARATUS AND METHOD
    Publication number: 20140008205
    Abstract: A carbonaceous feed pyrolysis apparatus is provided including two or more hot particle fluidised beds, and one or more positive displacement apparatus for the transfer of hot particles between two or more of the beds, wherein one or more of the fluidised beds contains a combustion zone. A bio-oil production process is also provided, including pyrolysis of a carbonaceous bio-mass using two or more fluidized beds, including a first combustion zone carried out in one or more combustion fluidized beds in which a particulate material is fluidized and heated, and a second pyrolysis zone carried out in one or more pyrolysis fluidized beds in which the hot particles heated in the combustion zone are used for pyrolysis of the bio-mass.
    Type: Application
    Filed: September 8, 2011
    Publication date: January 9, 2014
    Applicant: UNIVERSITY OF PRETORIA
    Inventors: Michael David Heydenrych, Stephen David Swart, Akwasi Acheampong Boateng