Yu Liu

US Patent:

7820130, Oct 26, 2010

Filed:

Nov 24, 2004

Appl. No.:

10/996869

Inventors:

Valery N. Khabashesku - Houston TX, US
Yu Liu - Houston TX, US
John L. Margrave - Bellaire TX, US

Assignee:

William Marsh Rice University - Houston TX

International Classification:

C01B 31/06

US Classification:

423446

Abstract:

The present invention is directed to functionalized nanoscale diamond powders, methods for making such powders, applications for using such powders, and articles of manufacture comprising such powders. Methods for making such functionalized nanodiamond powders generally comprise a fluorination of nanodiamond powder. In some embodiments, such methods comprise reacting fluorinated nanodiamond powder with a subsequent derivatization agent, such as a strong nucleophile.

US Patent:

20220270361, Aug 25, 2022

Filed:

Feb 10, 2020

Appl. No.:

17/760620

Inventors:

- HOUSTON TX, US
Yu LIU - Houston TX, US

International Classification:

G06V 20/05
G06T 7/136
G06T 5/00
E21B 44/00
E21B 47/001
E21B 47/002

Abstract:

This disclosure is directed to initiating adjustment of an operation associated with an underwater drilling system, which may include receiving at least one underwater image; identifying the reference object in the at least one underwater image, wherein a position of the reference object is fixed relative to an underwater borehole or an underwater cloud; determining a first parameter associated with the reference object; identifying the underwater cloud in the at least one underwater image; determining a second parameter associated with the underwater cloud; adjusting the second parameter associated with the underwater cloud based on the first parameter associated with the reference object; and initiating an adjustment of the operation associated with the underwater drilling system based on the adjusted second parameter associated with the underwater cloud.

US Patent:

20220251005, Aug 11, 2022

Filed:

Jun 8, 2020

Appl. No.:

17/621945

Inventors:

- Midland MI, US
Lin Luo - Sugar Land TX, US
Yu Liu - Lake Jackson TX, US
Matthew T. Pretz - Lake Jackson TX, US
Andrzej Malek - Midland MI, US

Assignee:

Dow Global Technologies LLC - Midland MI

International Classification:

C07C 7/167
C07C 7/00
C07C 7/04
C07C 4/04
C07C 5/333
B01J 23/62
B01D 45/16
B01D 3/14

Abstract:

A method for operating an acetylene hydrogenation unit of a steam cracking system that integrates a fluidized catalytic dehydrogenation (FCDh) effluent from a fluidized catalytic dehydrogenation (FCDh) system may include separating a cracked gas from the steam cracking system into at least a hydrogenation feed comprising at least acetylene, CO, and hydrogen, introducing the FCDh effluent to the separation system, combining the FCDh effluent with the cracked gas upstream of the separation system, or both. The method may include hydrogenating acetylene in the hydrogenation feed. Elevated CO concentration in the hydrogenation feed due to the FCDh effluent may reduce a reaction rate of acetylene hydrogenation. The acetylene hydrogenation unit may operate at an elevated temperature relative to normal operating temperatures when the portion of the FCDh effluent is not integrated, such that a concentration of acetylene in the hydrogenated effluent is less than a threshold acetylene concentration.

US Patent:

20220251006, Aug 11, 2022

Filed:

Jun 8, 2020

Appl. No.:

17/621949

Inventors:

- Midland MI, US
Hangyao Wang - Pearland TX, US
Yu Liu - Lake Jackson TX, US
Barry B. Fish - Lake Jackson TX, US

Assignee:

Dow Global Technologies LLC - Midland MI

International Classification:

C07C 7/167
C07C 5/03
C07C 7/00
C07C 7/04
B01J 23/62
B01D 3/14

Abstract:

A method for operating an integrated system for producing olefins may include contacting a hydrogenation feed with a first hydrogenation catalyst to produce a hydrogenated effluent, the hydrogenation feed including at least a portion of a first process effluent from a first olefin production process and at least a portion of a second process effluent from a second olefin production process. The hydrogenation feed may include at least hydrogen, ethylene, carbon monoxide, acetylene, methyl acetylene, and propadiene, and the first hydrogenation catalyst may be a hydrogenation catalyst having a temperature operating range of at least 40 C. The hydrogenated effluent may include methyl acetylene, propadiene, or both. The method may further include contacting at least a portion of the hydrogenated effluent with a second hydrogenation catalyst, which may cause hydrogenation of at least a portion of the methyl acetylene and propadiene to produce an MAPD hydrogenated effluent.

US Patent:

20220227687, Jul 21, 2022

Filed:

Jun 8, 2020

Appl. No.:

17/621919

Inventors:

- Midland MI, US
Hangyao Wang - Pearland TX, US
Yu Liu - Lake Jackson TX, US
Matthew T. Pretz - Lake Jackson TX, US
Andrzej Malek - Midland MI, US

Assignee:

Dow Global Technologies LLC - Midland MI

International Classification:

C07C 5/333
C07C 4/04
C07C 7/167
B01J 23/62

Abstract:

A method for operating an acetylene hydrogenation unit in an integrated steam cracking-fluidized catalytic dehydrogenation (FCDh) system may include separating a cracked gas from a steam cracking system and an FCDh effluent from an FCDh system into a hydrogenation feed and an acetylene-depleted stream, the hydrogenation feed comprising at least hydrogen, CO, and acetylene. During normal operating conditions, at least 20% of the CO in the hydrogenation feed is from the cracked gas. The method may include contacting the hydrogenation feed with an acetylene hydrogenation catalyst to hydrogenate at least a portion of the acetylene in the hydrogenation feed to produce a hydrogenated effluent. The steam cracking is operated under conditions that increase CO production such that a concentration of CO in the cracked gas is great enough that when a flowrate of the FCDh effluent is zero, a CO concentration in the hydrogenation feed is at least 100 ppmv.

US Patent:

20210036647, Feb 4, 2021

Filed:

Jul 31, 2019

Appl. No.:

16/527872

Inventors:

- Houston TX, US
Yu Liu - Katy TX, US

International Classification:

H02P 27/08
H02M 7/5387

Abstract:

Disclosed embodiments are directed to a technique to remove DC offset from current measurement signals through shunt resistors in digital signal processing for current reconstruction when using discontinuous pulse width modulation (DPWM). Such measurements regarding current are pertinent to a feedback loop used for a system including a DC-link capacitor, inverter, and motor. A method of removing DC offset comprises: determining a three-phase output current signal of an inverter, wherein the inverter is coupled to a motor and a power supply; producing a voltage signal based on the three-phase output current signal and the resistances of one or more shunt resistors disposed in the inverter; applying an analog gain circuit to the voltage signal; processing the voltage signal with an analog-to-digital converter (ADC); applying a DC offset corrector to the voltage signal; and performing current reconstruction on the voltage signal to produce a continuous current signal.

US Patent:

20200321824, Oct 8, 2020

Filed:

Apr 3, 2020

Appl. No.:

16/839659

Inventors:

- Houston TX, US
Yao Duan - Houston TX, US
Yu Liu - Houston TX, US
Mark Rayner - Houston TX, US

International Classification:

H02K 5/132
F04C 13/00
F04B 49/06
E21B 43/12
H02P 6/08
H02P 25/022
F04D 15/00

Abstract:

A method for controlling a permanent magnet (PM) synchronous motor in an ESP application is provided. A load angle of the PM motor is estimated. A voltage adjustment value is determined for the PM motor based at least on the estimated load angle of the PM motor. A voltage to be applied to the PM motor is determined based on the voltage adjustment value.

US Patent:

20200181985, Jun 11, 2020

Filed:

Feb 17, 2020

Appl. No.:

16/792789

Inventors:

- Houston TX, US
Liang ZHAO - Houston TX, US
Xiaomin CHENG - Houston TX, US
Demin CHEN - Houston TX, US
Xiongwen YANG - Houston TX, US
Yonghong WANG - Houston TX, US
Yu LIU - Houston TX, US

Assignee:

CNPC USA Corporation - Houston TX

International Classification:

E21B 10/567
E21B 10/42

Abstract:

The present invention provides non-planar cutting tooth and a diamond drill bit. The non-planar cutting tooth and the diamond drill bit have great ability of impact resistance and balling resistance. According to the features of drilled formation, cutting teeth are arranged on the drill bit with different mode, which can improve the mechanical speed and footage of the drill bit.

Address:

9201 Clarewood Dr APT 97, Houston, TX 77036

VIN:

2T2GK31U77C003100

Make:

LEXUS

Model:

RX 350

Year:

2007