Tecogen, Inc.

Chapeau, Inc.

Ranson Roser

Joseph B Gehret

Robert Panora

Jean Roy

Gerald R Dorn

Robert A Panora

An assembly and method for reducing nitrogen oxides, carbon monoxide, hydrocarbons and hydrogen gas in exhausts of internal combustion engines and simultaneously generating electrical power, wherein the exhaust is acted upon in a first stage catalytic converter and is at least in part passed through a thermoelectric generator for production of electrical power. The exhausts are thereafter directed to a second stage catalytic converter.

Assembly and method for reducing nitrogen oxides, carbon monoxide, hydrocarbons and hydrogen gas in exhausts of internal combustion engines and producing an electrical output

A system for reducing ammonia in exhaust gas generated from a lean burn internal combustion engine includes an oxidation catalyst, a selective reduction catalyst (SCR), a cooling unit, and a three-way catalyst. Exhaust gas generated by the engine passes through the oxidation catalyst to oxidize carbon monoxide from the exhaust gas to form carbon dioxide. Nitrous oxide (NOx) compounds in the exhaust gas are reduced in the SCR to form nitrogen and water. The exhaust gas is then cooled in a cooling unit and then passed over the three-way catalyst. The three-way catalyst causes ammonia in the cooled exhaust stream to react to form less harmful compounds, such as nitrogen and water.

Assembly and method for reducing ammonia in exhaust of internal combustion engines

An assembly and method for reducing nitrogen oxides, carbon monoxide and hydrocarbons in exhausts of internal combustion engines, wherein the exhaust is acted upon in a first stage catalytic converter. A first portion of the first stage catalytic converter output is cooled and a second portion of the catalytic converter output is not cooled. The cooled and not cooled exhausts are united and directed to a second stage catalytic converter. Air is injected into a selected one of (1) the not cooled exhaust prior to the juncture thereof with the cooled exhaust, and (2) the combined cooled and not cooled exhausts after the juncture thereof.

Assembly and method for reducing nitrogen oxides, carbon monoxide and hydrocarbons in exhausts of internal combustion engines

A recycled exhaust gas cooling and condensate regulation system for a natural gas fired internal combustion engine driven co-generation plant, which allows efficient exhaust recycled gas combustion while maintaining lower head temperatures to reduce thermal NOemissions and delivering increased process/utility heat to a proximate co-generation client, is provided. The recycled exhaust gas cooling and condensate regulation system has primary and secondary, air-to-gas, exchanger units, coupled in series, such that the first unit, designed to take exhaust gas exiting the engine, cools the gas to a first exhaust gas temperature effectively super saturating the water vapor in the cooled exhaust gas; and, the second unit, designed to handle lower inlet temperatures, condenses the water vapor and super cools the exhaust gas to &#x3c;130 F. In one embodiment, the engine intake mixture including the exhaust gas is supercharged. In another embodiment, a separate intercooler circuit is used to cool the compressed intake charge containing the recycled gas prior to entry into the intake engine manifold to further reduce head temperatures and control thermal NOemissions.

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Reno, NV, United States of America

Ranson Roser