公开(公告)号：US10350537B2

公开(公告)日：2019-07-16

申请号：US15653806

申请日：2017-07-19

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram ,  Hans Thomann

IPC: B01D53/047 ,  C01B32/50 ,  B01D53/04 ,  C01B3/56 ,  C01B21/04 ,  F01N3/08 ,  B01D53/62

Abstract: Methods are provided for the production of nitrogen, hydrogen, and carbon dioxide from an exhaust gas. Exhaust gas from combustion in a fuel rich (or reducing) atmosphere is primarily composed of CO2, CO, N2, H2O, and H2. CO may be converted to CO2 and H2 via the water gas shift reaction. Carbon dioxide may then be effectively separated from nitrogen and hydrogen to produce a carbon dioxide stream and a nitrogen/hydrogen stream. The nitrogen/hydrogen stream may then be effectively separated to produce a high purity nitrogen stream and a high purity hydrogen stream. The process may be done in any order, such as separating the nitrogen first or the carbon dioxide first.

公开(公告)号：US10071338B2

公开(公告)日：2018-09-11

申请号：US15339978

申请日：2016-11-01

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram ,  Hans Thomann ,  Franklin F. Mittricker ,  Loren Starcher

IPC: B01D53/047 ,  F01N13/00 ,  F01N3/08 ,  B01D53/053

CPC classification number: B01D53/047 ,  B01D53/053 ,  B01D2253/10 ,  B01D2253/1124 ,  B01D2256/10 ,  B01D2256/22 ,  B01D2257/102 ,  B01D2257/40 ,  B01D2257/504 ,  B01D2259/40028 ,  B01D2259/40043 ,  B01D2259/40052 ,  B01D2259/40056 ,  B01D2259/40086 ,  B01D2259/414 ,  F01N3/0857 ,  F01N3/0885 ,  F01N13/0093 ,  F01N13/011 ,  Y02C10/08

Abstract: Systems and methods for using pressure swing adsorption to separate and/or capture resulting emissions are provided. A stream of recycled exhaust gas is passed into a first swing adsorption reactor comprising a first adsorbent material which adsorbs CO2. An enriched N2 stream is recovered from a forward end of the first swing adsorption reactor. The pressure in the first swing adsorption reactor is reduced. The first swing adsorption reactor is purged with a portion of the first N2 stream recovered from the first swing adsorption reactor. The first purge output is passed to a second swing adsorption reactor comprising a second adsorbent material which adsorbs CO2. A second N2 stream is recovered from the second swing adsorption reactor. The pressure in the second swing adsorption reactor is reduced. The second swing adsorption reactor is purged with a steam purge.

公开(公告)号：US10071337B2

公开(公告)日：2018-09-11

申请号：US15339972

申请日：2016-11-01

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram ,  Hans Thomann ,  Edward W. Corcoran, Jr.

IPC: B01D53/047 ,  B01D53/04

CPC classification number: B01D53/047 ,  B01D53/0423 ,  B01D2253/108 ,  B01D2253/1124 ,  B01D2256/10 ,  B01D2256/22 ,  B01D2257/102 ,  B01D2257/504 ,  B01D2259/40028 ,  B01D2259/40043 ,  Y02C10/08

Abstract: Systems and methods are provided for combined cycle power generation while reducing or mitigating emissions during power generation. Recycled exhaust gas from a power generation combustion reaction can be separated using a staged complementary swing adsorption process so as to generate a high purity CO2 stream while reducing/minimizing the energy required for the separation and without having to reduce the temperature of the exhaust gas. This can allow for improved energy recovery while also generating high purity streams of carbon dioxide and nitrogen.

公开(公告)号：US11225609B2

公开(公告)日：2022-01-18

申请号：US17019803

申请日：2020-09-14

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram

IPC: C10B53/02 ,  C10B53/07 ,  B01D53/02 ,  C07C29/151

Abstract: Systems and methods are provided for co-processing of plastic waste with biomass to generate gas phase product streams with improved properties. The systems and methods can include having a high temperature swing adsorption process integrated with a pyrolysis process, gasification process, or other thermal conversion process, so that CO2 can be removed from at least a portion of the effluent. This can facilitate capture of CO2 when using pyrolysis, gasification, or other thermal conversion to generate a hydrogen-containing stream. Additionally, the integrated system and/or method can allow for production of multiple product streams having desirable ratios of hydrogen to carbon oxides.

公开(公告)号：US20210130698A1

公开(公告)日：2021-05-06

申请号：US17019803

申请日：2020-09-14

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram

IPC: C10B53/02 ,  C10B53/07 ,  B01D53/02 ,  C07C29/151

Abstract: Systems and methods are provided for co-processing of plastic waste with biomass to generate gas phase product streams with improved properties. The systems and methods can include having a high temperature swing adsorption process integrated with a pyrolysis process, gasification process, or other thermal conversion process, so that CO2 can be removed from at least a portion of the effluent. This can facilitate capture of CO2 when using pyrolysis, gasification, or other thermal conversion to generate a hydrogen-containing stream. Additionally, the integrated system and/or method can allow for production of multiple product streams having desirable ratios of hydrogen to carbon oxides.

公开(公告)号：US20210087506A1

公开(公告)日：2021-03-25

申请号：US16891224

申请日：2020-06-03

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram

IPC: C12M1/00 ,  C12M1/12 ,  C12N1/12

Abstract: A system for growing algae includes a photobioreactor comprising a tubular structure having inner and outer surfaces, an annular space defined between the inner and outer surfaces, an inlet to allow an algae slurry to enter the annular space, and a mechanism configured to produce radially-directed contractions and expansions in the tubular structure. At least one of the inner and outer surfaces is transparent to at least some wavelengths of light useful for growing algae within the algae slurry.

公开(公告)号：US20200206673A1

公开(公告)日：2020-07-02

申请号：US16730205

申请日：2019-12-30

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram ,  Patrick P. McCall ,  Brendon L. Keinath ,  Ananda K. Nagavarapu

IPC: B01D53/04 ,  B01D53/08

Abstract: Systems and methods are provided for separation of CO2 from dilute source streams. The systems and methods for the separation can include use of contactors that correspond radial flow adsorbent modules that can allow for efficient contact of CO2-containing gas with adsorbent beds while also facilitating use of heat transfer fluids in the vicinity of the adsorbent beds to reduce or minimize temperature variations. In particular, the radial flow adsorbent beds can be alternated with regions of axial flow heat transfer conduits to provide thermal management. The radial flow structure for the adsorbent beds combined with axial flow conduits for heat transfer fluids can allow for sufficient temperature control to either a) reduce or minimize temperature variations within the adsorbent beds or b) facilitate performing the separation using temperature as a swing variable for controlling the working capacity of the adsorbent.

公开(公告)号：US10449479B2

公开(公告)日：2019-10-22

申请号：US15653822

申请日：2017-07-19

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram ,  Hans Thomann ,  David C. Calabro ,  Frank Mittricker

IPC: B01D53/04 ,  B01D53/047

Abstract: An adsorption module and associated processes for conducting advanced separations processes such as sorption enhanced water-gas shift (SEWGS). The adsorption module contains at least one angled baffle to create at least two tapered adsorbent beds within the adsorption module. The taper is such that the adsorbent beds' cross-sections within the adsorption module decrease in the direction of feed flow, thereby taking advantage of increased product purity and process efficiency provided by tapered adsorption beds.

公开(公告)号：US10363516B2

公开(公告)日：2019-07-30

申请号：US15653770

申请日：2017-07-19

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram

IPC: B01D53/04 ,  B01D53/047 ,  C10L3/10

Abstract: In various aspects, apparatuses and methods are provided for low pressure drop gas separations. In PSA processes, where there are large swings in pressure and corresponding swings in fluid velocity through the adsorbent, mechanical stresses during pressure cycling are of considerable concern. When that pressure is relieved in a lower pressure portion of the cycle, the high velocity of gas moving through the adsorbent bed can erode, strip away, or otherwise damage the channels within the adsorbent. Provided herein are methods which utilize flexible boundaries between adsorbent beds that are operated out of phase with one another. The flexible boundaries permit an increase in void space through the adsorbent during high pressure stages of the cycle and a decrease in void space through the adsorbent during low pressure stages of the cycle.

公开(公告)号：US10143960B2

公开(公告)日：2018-12-04

申请号：US15339997

申请日：2016-11-01

Applicant: ExxonMobil Research and Engineering Company

Inventor： Narasimhan Sundaram ,  Hans Thomann ,  Edward W. Corcoran, Jr.

IPC: B01D53/047 ,  B01D53/04

Abstract: A staged complementary pressure swing adsorption system and method for low energy fractionation of a mixed fluid. Two beds in a four-column PSA system are selective for component A, and another two columns are selective for component B. The cycle creates an intermittent A and B product, using the purge effluent from the complementary product fed at an intermediate pressure. This intermittent product is used as purge gas for low-pressure purged elsewhere in the cycle using appropriate storage tanks. The use of an intermediate pressure in this cycle enables continuous production of purified component A and B without the use of compressors. Columns may also be configured to enable pressure to equalize between complementary columns.