Abstract: The invention relates to the use of used alumina to reduce the level of inorganic contaminants, such as mercury and arsenic, from waste fluid streams. The invention further provides a process for reducing the level of mercury or arsenic in fluid streams by contacting the fluid stream with used alumina, such as used Claus catalyst.
Type:
Grant
Filed:
February 1, 2008
Date of Patent:
January 20, 2009
Assignees:
Mar Systems LLC., The United States of America as represented by the Administration of the U.S. Environmental Protection Agency
Inventors:
Claude Kennard, Michael A. Gonzalez, David C. Szlag
Abstract: An internal combustion engine is adapted for operation with homogeneous combustion and compression ignition. The engine includes plural cylinders with the piston in each cylinder defining the main combustion chamber and connected to a crankshaft for reciprocating motion rotatably driving the crankshaft. An auxiliary combustion chamber and an inlet passage are formed in the engine head for each of the cylinders with a control valve for controlling communication between the main combustion chamber and the auxiliary combustion chamber and an inlet valve for controlling communication between the main combustion chamber and the inlet passage. The inlet valve is driven with rotation of the crankshaft, while the drive for the combustion control valve is independent of angular position of the crankshaft and has its own controller for timing its opening and closing to provide controlled homogeneous combustion.
Type:
Grant
Filed:
May 30, 2003
Date of Patent:
June 28, 2005
Assignee:
The United States of America as represented by the Administration of the U.S. Environmental Protection Agency
Inventors:
Ruonan Sun, Karl H. Hellman, Charles L. Gray