Mark Dean Ibsen
Engineers at Miners Pl, Littleton, CO
License number
Colorado 30251
Issued Date
Feb 7, 1995
Renew Date
Nov 1, 2015
Expiration Date
Oct 31, 2017
Type
Professional Engineer
Address
Address
9052 Miners Pl, Littleton, CO 80126
Professional information
Gasification System And Method
US Patent:
2013002, Jan 31, 2013
Filed:
Jul 23, 2012
Appl. No.:
13/555732
Inventors:
Weibin Jiang - Aurora CO, US
Bruce E. McComish - Mitchell SD, US
Bryan C. Borum - Commerce City CO, US
Benjamin H. Carryer - Denver CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark Robertson - Denver CO, US
Eric Elrod - Arvada CO, US
Sim Weeks - Duluth GA, US
Harold A. Wright - Longmont CO, US
Bruce E. McComish - Mitchell SD, US
Bryan C. Borum - Commerce City CO, US
Benjamin H. Carryer - Denver CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark Robertson - Denver CO, US
Eric Elrod - Arvada CO, US
Sim Weeks - Duluth GA, US
Harold A. Wright - Longmont CO, US
Assignee:
RENTECH, INC. - Los Angeles CA
International Classification:
B01J 19/00, F02C 1/00
US Classification:
422141, 60722
Abstract:
A system configured for the production of at least one product selected from the group consisting of syngas, Fischer-Tropsch synthesis products, power, and chemicals, the system comprising a dual fluidized bed gasification apparatus and at least one apparatus selected from power production apparatus configured to produce power from the gasification product gas, partial oxidation reactors configured for oxidation of at least a portion of the product gas, tar removal apparatus configured to reduce the amount of tar in the product gas, Fischer-Tropsch synthesis apparatus configured to produce Fischer-Tropsch synthesis products from at least a portion of the product gas, chemical production apparatus configured for the production of at least one non-Fischer-Tropsch product from at least a portion of the product gas, and dual fluidized bed gasification units configured to alter the composition of the product gas. Methods of operating the system are also provided.
Supplemental Fuel To Combustor Of Dual Fluidized Bed Gasifier
US Patent:
2014003, Feb 6, 2014
Filed:
Oct 8, 2013
Appl. No.:
14/048989
Inventors:
Bruce E. Mccomish - Mitchell SD, US
Bryan C. Borum - Commerce City CO, US
Benjamin H. Carryer - Dubuque IA, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark K. Robertson - Denver CO, US
Eric R. Elrod - Arvada CO, US
Sim Weeks - Duluth GA, US
Harold A. Wright - Longmont CO, US
Bryan C. Borum - Commerce City CO, US
Benjamin H. Carryer - Dubuque IA, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark K. Robertson - Denver CO, US
Eric R. Elrod - Arvada CO, US
Sim Weeks - Duluth GA, US
Harold A. Wright - Longmont CO, US
Assignee:
RENTECH, INC. - Los Angeles CA
International Classification:
F23C 10/00
US Classification:
422142
Abstract:
A method of gasification by introducing a feed material to be subjected to gasification into a dual fluidized bed gasifier comprising a pyrolyzer fluidly connected with a combustor such that a circulation stream comprising a heat transfer material can be continuously circulated between the pyrolyzer, in which the temperature of the circulation stream is reduced, and the combustor, in which the temperature of the circulation stream is increased, wherein the pyrolyzer is operable to convert at least a portion of the feed material into a gasifier product gas comprising hydrogen and carbon monoxide, and wherein the combustor is operable to increase the temperature of the circulation stream via combustion of char introduced thereto with the circulation stream and at least one supplemental fuel. A system for carrying out the method is also provided.
Gasification System And Method
US Patent:
2013002, Jan 31, 2013
Filed:
Jul 23, 2012
Appl. No.:
13/555739
Inventors:
Weibin Jiang - Aurora CO, US
Bruce E. McComish - Mitchell SD, US
Bryan C. Borum - Commerce City CO, US
Benjamin H. Carryer - Denver CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark Robertson - Denver CO, US
Eric Elrod - Arvada CO, US
Sim Weeks - Duluth GA, US
Harold A. Wright - Longmont CO, US
Bruce E. McComish - Mitchell SD, US
Bryan C. Borum - Commerce City CO, US
Benjamin H. Carryer - Denver CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark Robertson - Denver CO, US
Eric Elrod - Arvada CO, US
Sim Weeks - Duluth GA, US
Harold A. Wright - Longmont CO, US
Assignee:
RENTECH, INC. - Los Angeles CA
International Classification:
F02G 3/00, B01J 19/00
US Classification:
60722, 422141
Abstract:
A system configured for the production of at least one product selected from the group consisting of syngas, Fischer-Tropsch synthesis products, power, and chemicals, the system comprising a dual fluidized bed gasification apparatus and at least one apparatus selected from power production apparatus configured to produce power from the gasification product gas, partial oxidation reactors configured for oxidation of at least a portion of the product gas, tar removal apparatus configured to reduce the amount of tar in the product gas, Fischer-Tropsch synthesis apparatus configured to produce Fischer-Tropsch synthesis products from at least a portion of the product gas, chemical production apparatus configured for the production of at least one non-Fischer-Tropsch product from at least a portion of the product gas, and dual fluidized bed gasification units configured to alter the composition of the product gas. Methods of operating the system are also provided.
Hydrogen And Carbon Utilization In Synthetic Fuels Production Plants
US Patent:
2012002, Jan 26, 2012
Filed:
Sep 29, 2011
Appl. No.:
13/248547
Inventors:
Sergio Mohedas - Westminster CO, US
Mark Ibsen - Highlands Ranch CO, US
Mark Ibsen - Highlands Ranch CO, US
Assignee:
RENTECH, INC. - Los Angeles CA
International Classification:
C07C 27/00, B01J 19/00
US Classification:
518715, 422187
Abstract:
A system including at least one hydrogen extraction unit comprising an inlet for a synthesis feedgas from a synthesis feedgas line and adapted to remove at least one hydrogen-rich gas and at least one hydrogen-lean gas from the synthesis feedgas to yield a refined synthesis gas; and at least one hydrocarbon synthesis reactor, at least one dedicated activation reactor, or both, wherein the at least one hydrocarbon synthesis reactor is fluidly connected with the at least one hydrogen extraction unit and configured to provide liquid hydrocarbons and a first byproduct gas from a synthesis reactor feedstream comprising at least a portion of the refined synthesis gas; and wherein the at least one dedicated activation reactor is fluidly connected with the at least one hydrogen extraction unit, the at least one hydrocarbon synthesis reactor, or both, and configured for activation of hydrocarbon synthesis catalyst via an activation gas.
Supplemental Fuel To Combustor Of Dual Fluidized Bed Gasifier
US Patent:
2013016, Jun 27, 2013
Filed:
Oct 26, 2012
Appl. No.:
13/661815
Inventors:
Weibin JIANG - Aurora CO, US
Bruce E. MCCOMISH - Mitchell SD, US
Bryan C. BORUM - Commerce City CO, US
Benjamin H. CARRYER - Dubuque IA, US
Mark D. IBSEN - Highlands Ranch CO, US
Mark K. ROBERTSON - Denver CO, US
Eric R. ELROD - Arvada CO, US
Sim WEEKS - Duluth GA, US
Harold A. WRIGHT - Longmont CO, US
Bruce E. MCCOMISH - Mitchell SD, US
Bryan C. BORUM - Commerce City CO, US
Benjamin H. CARRYER - Dubuque IA, US
Mark D. IBSEN - Highlands Ranch CO, US
Mark K. ROBERTSON - Denver CO, US
Eric R. ELROD - Arvada CO, US
Sim WEEKS - Duluth GA, US
Harold A. WRIGHT - Longmont CO, US
Assignee:
Rentech, Inc. - Los Angeles CA
International Classification:
C01B 3/02, F23C 10/00
US Classification:
252373, 422140, 422145
Abstract:
A method of gasification by introducing a feed material to be subjected to gasification into a dual fluidized bed gasifier comprising a pyrolyzer fluidly connected with a combustor such that a circulation stream comprising a heat transfer material can be continuously circulated between the pyrolyzer, in which the temperature of the circulation stream is reduced, and the combustor, in which the temperature of the circulation stream is increased, wherein the pyrolyzer is operable to convert at least a portion of the feed material into a gasifier product gas comprising hydrogen and carbon monoxide, and wherein the combustor is operable to increase the temperature of the circulation stream via combustion of char introduced thereto with the circulation stream and at least one supplemental fuel. A system for carrying out the method is also provided.
Method And Apparatus For Regenerating An Iron-Based Fischer-Tropsch Catalyst
US Patent:
6838487, Jan 4, 2005
Filed:
Dec 4, 2003
Appl. No.:
10/728109
Inventors:
Belma Demirel - Longmont CO, US
Mark S. Bohn - Golden CO, US
Charles B. Benham - Littleton CO, US
James E. Siebarth - Lakewood CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark S. Bohn - Golden CO, US
Charles B. Benham - Littleton CO, US
James E. Siebarth - Lakewood CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Assignee:
Rentech, Inc. - Denver CO
International Classification:
C07C 2700, B01J 2034
US Classification:
518710, 518709, 502 38, 502 41, 502 45
Abstract:
Solvent extraction is used to remove wax and contaminants from an iron-based Fischer-Tropsch catalyst in a natural circulation continuous-flow system. The wax-free catalyst is then subjected to controlled oxidation to convert the iron to its initial oxidized state, FeO. Reactivation of the oxide catalyst precursor is carried out by addition of synthesis gas.
Method And Apparatus For Regenerating An Iron-Based Fischer-Tropsch Catalyst
US Patent:
7303731, Dec 4, 2007
Filed:
Dec 7, 2004
Appl. No.:
11/005873
Inventors:
Belma Demirel - Longmont CO, US
Mark S. Bohn - Golden CO, US
Charles B. Benham - Littleton CO, US
James E. Siebarth - Lakewood CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark S. Bohn - Golden CO, US
Charles B. Benham - Littleton CO, US
James E. Siebarth - Lakewood CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Assignee:
Rentech, Inc. - Los Angeles CA
International Classification:
B01J 8/00, B01J 38/48
US Classification:
422223, 422212, 422213, 422140, 422144, 422145, 422147, 518710, 502 22
Abstract:
Solvent extraction is used to remove wax and contaminants from an iron-based Fischer-Tropsch catalyst in a natural circulation continuous-flow system. The wax-free catalyst is then subjected to controlled oxidation to convert the iron to its initial oxidized state, FeO. Reactivation of the oxide catalyst precursor is carried out by addition of synthesis gas.
System And Method For Conditioning Biomass-Derived Synthesis Gas
US Patent:
2010025, Oct 7, 2010
Filed:
Apr 6, 2010
Appl. No.:
12/754797
Inventors:
Benjamin H. CARRYER - Denver CO, US
Eric R. ELROD - Arvada CO, US
Mark D. IBSEN - Highlands Ranch CO, US
Brian K. JOHNSON - Arvada CO, US
Harold A. WRIGHT - Longmont CO, US
Eric R. ELROD - Arvada CO, US
Mark D. IBSEN - Highlands Ranch CO, US
Brian K. JOHNSON - Arvada CO, US
Harold A. WRIGHT - Longmont CO, US
Assignee:
RENTECH, INC. - Los Angeles CA
International Classification:
C07C 1/04, C01B 3/38, B01J 19/00
US Classification:
518702, 252373, 422189
Abstract:
A thermal conversion process comprising: pyrolizing or gasifying a carbonaceous feedstock to produce a first synthesis gas having a first H:CO ratio of less than a minimum value or greater than a maximum value; providing enriched oxygen; and subjecting the first synthesis gas to partial oxidation in the presence of at least a portion of the enriched oxygen to produce a conditioned synthesis gas having a desired ratio of H:CO in the range of from the minimum value to the maximum value. A method of producing FT product liquids by providing a conditioned synthesis gas according to the process and producing FT product liquids by subjecting the conditioned synthesis gas to FT reaction under FT operating conditions. A system for carrying out the methods is also provided.
Gasifier Fluidization
US Patent:
2013010, May 2, 2013
Filed:
Oct 15, 2012
Appl. No.:
13/651996
Inventors:
Weibin JIANG - Aurora CO, US
Bruce E. McComish - Mitchell SD, US
Bryan C. Borum - Commerce City CO, US
Benjamin H. Carryer - Dubuque IA, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark K. Robertson - Denver CO, US
Eric R. Elrod - Arvada CO, US
Sim Weeks - Duluth GA, US
Harold A. Wright - Longmont CO, US
Bruce E. McComish - Mitchell SD, US
Bryan C. Borum - Commerce City CO, US
Benjamin H. Carryer - Dubuque IA, US
Mark D. Ibsen - Highlands Ranch CO, US
Mark K. Robertson - Denver CO, US
Eric R. Elrod - Arvada CO, US
Sim Weeks - Duluth GA, US
Harold A. Wright - Longmont CO, US
Assignee:
Rentech, Inc. - Los Angeles CA
International Classification:
C01B 3/02, C07C 27/00, C10J 3/48, B01J 8/18, C10J 3/46
US Classification:
518702, 422139, 48197 R, 48 62 R, 422141, 252373
Abstract:
A method of producing synthesis gas by introducing a feed material to be gasified into a gasification apparatus comprising at least one fluidized component operable as a fluidized bed, wherein the gasification apparatus is configured to convert at least a portion of the feed material into a gasifier product gas comprising synthesis gas; and maintaining fluidization of the at least one fluidized component by introducing a fluidization gas thereto, wherein the fluidization gas comprises at least one component other than steam. A system for producing synthesis gas is also provided.
Fischer-Tropsch Slurry Reactor Cooling Tube Arrangement
US Patent:
7108835, Sep 19, 2006
Filed:
Oct 8, 2003
Appl. No.:
10/681823
Inventors:
William H. Hawthorne - Thornton CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Peter S. Pedersen - Boulder CO, US
Mark S. Bohn - Golden CO, US
Mark D. Ibsen - Highlands Ranch CO, US
Peter S. Pedersen - Boulder CO, US
Mark S. Bohn - Golden CO, US
Assignee:
Rentech, Inc. - Denver CO
International Classification:
F27B 15/14, F27B 15/08, B01J 1/36, F28D 7/00, F28D 11/00
US Classification:
422146, 49147, 49200, 49201, 165 86, 16510416, 16510418, 518728
Abstract:
An arrangement of cooling tubes within a Fischer-Tropsch slurry reactor simplifies removal and reinstallation of cooling tubes for reactor maintenance.