Exxonmobil Research and Engineering Company

Caterpillar Inc.

Exxonmobil Chemical Patents Inc.

El-Mekki El-Malki

Prasenjeet Ghosh

Jon M Mcconnachie

Stuart Leon Soled

James C Vartuli

Chuansheng Bai

Walter Weissman

Daniel Mark Giaquinta

Valery Sokolovskii

Joseph Ernest Baumgartner

Alfred Hagemeyer

David M Lowe

Christine Esther Kliewer

Zhiguo Hou

Jason Wu

Jun Han

Pallassana S Venkataraman

Paul James Polini

Patricia A Bielenberg

Jeff Elks

Jon M McConnachie

Zhigou Hou

Doron Levin

Stephen John McCarthy

Alfred Gerhard Hagemeyer

Jean Willem Beeckman

Richard F Socha

Mohan Kalyanaraman

Anthony F Volpe

Paul Park

William G Borghard

Jeffrey T Elks

Peter W Jacobs

Anthony F Volpe, Jr

Paul W Park

Stephen John Mccarthy

Dan Giaquinta

Jeffrey Thomas Elks

Provided are improved exhaust gas cleaning systems and methods for treating exhaust gas from a combustion source that include a hydrogen generation system, a regenerable sulfur oxides trap, and a regenerable nitrogen storage reduction (NSR) catalyst trap. The improved exhaust gas cleaning systems and methods allow for the sulfur released from the sulfur trap to pass through the nitrogen oxide trap with no or little poisoning of NOstorage and reduction sites, which significantly improves NSR catalyst trap lifetime and performance to meet future emissions standards. The disclosed exhaust gas cleaning systems are suitable for use in internal combustion engines (e.g., diesel, gasoline, CNG) which operate with lean air/fuel ratios over most of the operating period.

Regenerable sulfur traps for on-board vehicle applications

A method is provided for preparing a supported cobalt-containing catalyst having substantially homogeneously dispersed, small cobalt crystallites. The method comprises depositing cobalt nitrate on a support and then subjecting the support to a two-step decomposition protocol. In the first step, the support is heated in an oxygen-containing, substantially water-free atmosphere to about 160&#xb0; C. to form an intermediate decomposition product. This intermediate product is then or hydrolyzed and reduced, or hydrolyzed, calcined and reduced.

Preparation of high activity cobalt catalysts, the catalysts and their use

Provided are improved regenerable SOtrap formulations for on-board vehicle applications. The regenerable sulfur trap formulations reduce the rate of sulfur poisoning of a downstream nitrogen storage reduction (NSR) catalyst trap in exhaust gas cleaning systems for combustion engines by adsorbing SOas metal sulfate under lean exhaust conditions and desorbing the accumulated SOunder rich exhaust conditions. The regenerable sulfur oxides trap catalyst compositions include a metal (M) oxide, wherein M is selected from Cu, Fe, Mn, Ag, Co and combinations thereof and a metal (M)-La&#x2014;Zr oxide, wherein M is selected from Cu, Fe, Mn, Ag, Co and combinations thereof. In addition, provided are improved exhaust gas cleaning systems and methods for treating exhaust gas from a combustion source that include a hydrogen generation system, a regenerable sulfur oxides trap, and a regenerable nitrogen storage reduction (NSR) catalyst trap. The improved exhaust gas cleaning systems and methods allow for the sulfur released from the sulfur trap to pass through the nitrogen oxide trap with no or little poisoning of NOstorage and reduction sites, which significantly improves NSR catalyst trap lifetime and performance to meet future emissions standards. The disclosed exhaust gas cleaning systems are suitable for use in internal combustion engines (e.g., diesel, gasoline, CNG) which operate with lean air/fuel ratios over most of the operating period.

A method is provided for preparing a supported cobalt-containing catalyst having substantially homogenously dispersed, small cobalt crystallites. The method comprises depositing cobalt nitrate on a support and then heating the support in an oxygen-containing, substantially water-free atmosphere to about 160&#xb0; C. to form an intermediate decomposition product. This intermediate decomposition product is then calcined and reduced.

Bulk metallic catalysts comprised of a Group VIII metal and a Group VIB metal and methods for synthesizing bulk metallic catalysts are provided. The catalysts are prepared by a method wherein precursors of both metals are mixed and interacted with at least one organic acid, such as glyoxylic acid, dried, calcined, and sulfided. The catalysts are used for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

Bulk group VIII/group VIB metal catalysts and method of preparing same

A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NOtherein, wherein the apparatus includes a first catalyst composed of a silver containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, and a second catalyst composed of a copper containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range.

[object Object]

Supported metallic catalysts comprised of a Group VIII metal, a Group VIB metal, and an organic additive, and methods for synthesizing supported metallic catalysts are provided. The catalysts are prepared by a method wherein precursors of both metals are mixed and interacted with at least one organic additive, dried, calcined, and sulfided. The catalysts are used for hydroprocessing, particularly hydrodesulfurization and hydrodenitrogenation, of hydrocarbon feedstocks.

High activity supported distillate hydroprocessing catalysts

The invention relates to a composition of matter comprising at least one metal from Group 3, at least one metal from Group 4, sulfur and oxygen, particularly useful as a catalyst for ether decomposition to alkanols and alkenes.

Mixed metal oxide containing sulfur

Growing community of inventors

Falls Church, VA, United States of America

El-Mekki El-Malki