公开(公告)号：US10094778B1

公开(公告)日：2018-10-09

申请号：US15612648

申请日：2017-06-02

Applicant: Chevron U.S.A. Inc.

Inventor： Huping Luo ,  Hye-Kyung Cho Timken ,  Toni Zhang Miao ,  Howard Steven Lacheen ,  Bi-Zeng Zhan

IPC: G01J3/00 ,  G01N21/552 ,  G01N21/3577 ,  G01N21/15 ,  G01N1/34 ,  G01N21/35

Abstract: An integrated system for monitoring a chemical concentration in an ionic liquid, comprising: a. an online FTIR instrument with an ATR window; b. a sample conditioning station that removes light hydrocarbons and produces a degassed ionic liquid that is analyzed by FTIR; and c. a solvent flushing system that flows solvent across the ATR window. Also, a process for monitoring the chemical concentration, comprising: a. degassing the ionic liquid in the sample conditioning station; b. passing the degassed ionic liquid over an ATR window; c. periodically redirecting a flow of the degassed ionic liquid via a bypass line or an on-off valve that isolates the ATR window from the process unit that elutes the ionic liquid; and d. flowing a solvent and a purging gas over the ATR window during the periodically redirecting step c); and e. resuming the passing of the degassed ionic liquid over the ATR window.

公开(公告)号：US20250059035A1

公开(公告)日：2025-02-20

申请号：US18234017

申请日：2023-08-15

Applicant: Chevron U.S.A. Inc.

Inventor： Howard Steven Lacheen ,  Christopher Declan Lane

IPC: C01B3/48 ,  B01D53/047 ,  B01J19/00 ,  B01J19/24 ,  C01B3/56 ,  C01B32/50 ,  F25J1/00 ,  F25J1/02

Abstract: A method for converting carbon dioxide gas to liquefied carbon dioxide includes (a) receiving, in a heat exchanger, a carbon dioxide gas stream and a liquefied natural gas stream, and (b) exposing the carbon dioxide gas stream to the liquefied natural gas stream to convert the carbon dioxide gas stream to liquefied carbon dioxide, and the liquefied natural gas stream is regasified to natural gas. The natural gas exits the heat exchanger and is sent to a steam methane reformer for further processing.

公开(公告)号：US20170354960A1

公开(公告)日：2017-12-14

申请号：US15182093

申请日：2016-06-14

Applicant: Chevron U.S.A. Inc.

Inventor： Kandaswamy Jothimurugesan ,  Howard Steven Lacheen ,  Mark Muraoka

IPC: B01J27/198 ,  B01J37/16 ,  B01J37/08 ,  C10G2/00 ,  B01J37/02

CPC classification number: B01J27/198 ,  B01J37/0215 ,  B01J37/08 ,  B01J37/16 ,  C10G2/333

Abstract: A process has been developed for preparing a Fischer-Tropsch catalyst precursor and a Fischer-Tropsch catalyst made from the precursor. The process includes preparing a catalyst precursor by contacting a boehmite material with a stabilizer containing vanadium-phosphorus. The boehmite material includes two or more different crystalline boehmites having the same average crystallite size to the nearest whole nanometer and having differing properties selected from surface area, pore volume, density and combinations thereof. The boehmite material is subjected to at least one heat treatment at a temperature of at least 500° C., either before or after the contacting step to obtain a stabilized catalyst support having a pore volume of at least 0.3 cc/g. A catalytic metal or a compound containing cobalt is applied to the stabilized catalyst support to form the catalyst precursor. Finally, the catalyst precursor is reduced to activate the catalyst precursor to obtain the Fischer Tropsch catalyst. The catalyst has enhanced hydrothermal stability as measured by losing no more than 6% of its pore volume when exposed to water vapor.

公开(公告)号：US20160089662A1

公开(公告)日：2016-03-31

申请号：US14961998

申请日：2015-12-08

Applicant: Chevron U.S.A. Inc.

Inventor： Kandaswamy Jothimurugesan ,  Howard Steven Lacheen

IPC: B01J27/198 ,  B01J35/02

CPC classification number: B01J27/198 ,  B01J21/04 ,  B01J35/002 ,  B01J35/0053 ,  B01J35/023 ,  B01J35/1038 ,  B01J37/0203 ,  B01J37/0207 ,  B01J37/0236 ,  B01J37/024 ,  B01J37/0244 ,  B01J37/08 ,  B01J37/18 ,  C10G2/332

Abstract: A process has been developed for preparing a Fischer-Tropsch catalyst precursor and a Fischer-Tropsch catalyst made from the precursor. The process includes contacting an alumina catalyst support material with a first solution containing a vanadium compound and a phosphorus compound, to obtain a modified catalyst support material. The modified catalyst support material is calcined at a temperature of at least 500° C. The calcined modified catalyst support has a pore volume of at least 0.4cc/g. The modified catalyst support is less soluble in acid solutions than an equivalent unmodified catalyst support. The modified catalyst support is contacted with a second solution which includes a precursor compound of an active cobalt catalyst component and an organic compound, preferably glutaric acid, to obtain a catalyst precursor. The catalyst precursor is reduced to activate the catalyst precursor to obtain the Fischer-Tropsch catalyst. The catalyst has enhanced hydrothermal stability as measured by losing no more than 10% of its pore volume when exposed to water vapor. The catalyst has Co3O4 crystallites having an average size of no greater than 20 nm. As a result, the catalyst has good activity.

Abstract translation: 已经开发了制备费 - 托催化剂前体和由前体制备的费 - 托催化剂的方法。 该方法包括使氧化铝催化剂载体材料与含有钒化合物和磷化合物的第一溶液接触，以获得改性的催化剂载体材料。 经修饰的催化剂载体材料在至少500℃的温度下煅烧。煅烧的改性催化剂载体的孔体积至少为0.4cc / g。 改性的催化剂载体在酸溶液中比相当的未改性的催化剂载体更难溶解。 改性的催化剂载体与包含活性钴催化剂组分的前体化合物和有机化合物，优选戊二酸的第二溶液接触，以获得催化剂前体。 催化剂前体被还原以活化催化剂前体以获得费 - 托催化剂。 催化剂具有增强的水热稳定性，当暴露于水蒸气时，其通过损失不超过其孔体积的10％来测量。 催化剂具有平均粒度不大于20nm的Co 3 O 4微晶。 结果，催化剂具有良好的活性。