公开(公告)号：US20240117140A1

公开(公告)日：2024-04-11

申请号：US18535791

申请日：2023-12-11

Applicant: University of Wyoming ,  Washington State University

Inventor： Maohong Fan ,  Wenyang Lu ,  Jinwen Zhang

IPC: C08J11/14 ,  B01J3/00 ,  B01J3/02

CPC classification number: C08J11/14 ,  B01J3/008 ,  B01J3/02 ,  C08J2367/02

Abstract: A high-efficiency, low-energy consumption and environmental-friendly recycling technology for PETE plastic waste is disclosed. The degradation of PETE plastic waste includes a method for attacking the —O— ester linkage in the repeat unit of PETE plastic with water in saturated pressure and CO2 in supercritical (Sc) conditions.

公开(公告)号：US20160332150A1

公开(公告)日：2016-11-17

申请号：US15152245

申请日：2016-05-11

Applicant: University of Wyoming

Inventor： Maohong Fan ,  Mingchen Tang

IPC: B01J23/83 ,  C01B3/40

CPC classification number: B01J23/83 ,  B01J23/002 ,  B01J35/1014 ,  B01J37/0036 ,  B01J37/035 ,  B01J37/32 ,  B01J2523/00 ,  C01B3/40 ,  C01B2203/0238 ,  C01B2203/1047 ,  C01B2203/1088 ,  C01B2203/1241 ,  Y02P20/52 ,  B01J2523/31 ,  B01J2523/3706 ,  B01J2523/3712 ,  B01J2523/842

Abstract: The invention relates to CeO2 and La2O3 for catalyzing Fe2O3—Al2O3 based chemical-looping reforming of CH4 with CO2 (CL-DRM). The reaction performance of all the composite oxygen carriers was evaluated in a fixed-bed reactor at atmospheric pressure condition. The influencing factors, including temperature and time-on-stream (TOS) were investigated. The characteristics of the oxygen carriers were checked with Brunauer-Emmett-Teller (BET) analysis and X-ray diffraction (XRD). The reducibility of the composite materials was elucidated with temperature-programmed reduction by CH4 (CH4-TPR). Preliminary experimental observations suggest that the simultaneous presence of CeO2 and La2O3 can not only enhance the reactivity of Fe2O3—Al2O3 toward CH4 oxidation and its oxygen releasing rate for fast reaction kinetics, but also improve the reactivity of its reduced form toward CO2 splitting.

Abstract translation: 本发明涉及用于催化基于Fe 2 O 3 -Al 2 O 3的CH 2与CO 2（CL-DRM）的化学循环重整的CeO 2和La 2 O 3。 在常压条件下，在固定床反应器中评价了所有复合载体的反应性能。 研究了影响因素，包括温度和时间（TOS）。 用Brunauer-Emmett-Teller（BET）分析和X射线衍射（XRD）检查氧载体的特征。 通过CH4（CH4-TPR）的温度程序化还原来阐明复合材料的还原性。 初步实验观察表明，CeO2和La2O3的同时存在不仅可以提高Fe2O3-Al2O3对CH4氧化的反应性及其释放速度，而且可以提高其还原形式对CO2分解的反应性。

公开(公告)号：US20250058275A1

公开(公告)日：2025-02-20

申请号：US18935116

申请日：2024-11-01

Applicant: University of Wyoming

Inventor： Maohong Fan ,  Xiaowen Zhang ,  Yangyan Gao ,  Armistead G Russell ,  Xin He

IPC: B01D53/86 ,  B01J31/02 ,  B01J37/34

Abstract: A transformational energy efficient technology using ionic liquid (IL) to couple with monoethanolamine (MEA) for catalytic CO2 capture is disclosed. [EMmim+][NTF2−] based catalysts are rationally synthesized and used for CO2 capture with MEA. A catalytic CO2 capture mechanism is disclosed according to experimental and computational studies on the [EMmim+][NTF2−] for the reversible CO2 sorption and desorption.

公开(公告)号：US11814299B2

公开(公告)日：2023-11-14

申请号：US17316315

申请日：2021-05-10

Applicant: UNIVERSITY OF WYOMING

Inventor： Maohong Fan ,  Zaixing Huang

IPC: C01F17/00 ,  C01F17/10 ,  C01F17/224 ,  C22B3/16 ,  C22B3/06 ,  C22B59/00

CPC classification number: C01F17/10 ,  C01F17/224 ,  C22B3/06 ,  C22B3/165 ,  C22B59/00

Abstract: Embodiments of the present disclosure generally relate to the recovery and extraction of rare earth elements. More specifically, embodiments of the disclosure relate to methods for separating rare earth elements from coal, coal by-product(s), and/or coal-derived product(s). In an embodiment, a method of removing rare earth elements from a coal-derived product is provided. The method generally includes introducing supercritical CO2 to the coal ash to form a first mixture, introducing a first acid to the first mixture to form a second mixture, and removing a first composition from the second mixture, the first composition comprising the one or more rare earth elements.

公开(公告)号：US20210387144A1

公开(公告)日：2021-12-16

申请号：US17177766

申请日：2021-02-17

Applicant: University of Wyoming

Inventor： Maohong Fan ,  Xiaowen Zhang ,  Yangyan Gao ,  Armistead G. Russell ,  Xin He

IPC: B01D53/86 ,  B01J31/02 ,  B01J37/34

Abstract: A transformational energy efficient technology using ionic liquid (IL) to couple with monoethanolamine (MEA) for catalytic CO2 capture is disclosed. [EMmim+][NTF2−] based catalysts are rationally synthesized and used for CO2 capture with MEA. A catalytic CO2 capture mechanism is disclosed according to experimental and computational studies on the [EMmim+][NTF2−] for the reversible CO2 sorption and desorption.

公开(公告)号：US20210276876A1

公开(公告)日：2021-09-09

申请号：US17193900

申请日：2021-03-05

Applicant: University of Wyoming

Inventor： Maohong Fan ,  Kaidi Sun ,  Tongtong Wang ,  Zhe Chen ,  Wenyang Lu ,  Xin He ,  Weibo Gong ,  Richard Arthur Horner

IPC: C01B32/97

Abstract: A clean and low-cost approach for reusing waste residual from coal utilization and sandstone powder is disclosed. The coal waste residual may be produced from any thermal, solvent extraction or combination process. For example, a sustainable and environmentally friendly method for synthesis of beta-silicon carbide (β-SiC) using, for example, the residual of Powder River Basin (PRB) coal extraction derived from ethanol and supercritical CO2 (EtOH-SCC) extraction combined with natural sandstone.

公开(公告)号：US20240157295A1

公开(公告)日：2024-05-16

申请号：US18049226

申请日：2022-10-24

Applicant: University of Wyoming

Inventor： Maohong Fan ,  Xiaowen Zhang ,  Yangyan Gao ,  Armistead G. Russell ,  Xin He

IPC: B01D53/86 ,  B01J31/02 ,  B01J37/34

CPC classification number: B01D53/8671 ,  B01D53/8693 ,  B01J31/0278 ,  B01J37/343 ,  B01D2257/504 ,  B01D2259/816

Abstract: A transformational energy efficient technology using ionic liquid (IL) to couple with monoethanolamine (MEA) for catalytic CO2 capture is disclosed. [EMmim+][NTF2−] based catalysts are rationally synthesized and used for CO2 capture with MEA. A catalytic CO2 capture mechanism is disclosed according to experimental and computational studies on the [EMmim+][NTF2−] for the reversible CO2 sorption and desorption.

公开(公告)号：US10478807B2

公开(公告)日：2019-11-19

申请号：US15607954

申请日：2017-05-30

Applicant: University of Wyoming

Inventor： Maohong Fan ,  Mingchen Tang

IPC: B01J23/10 ,  B01J23/83 ,  C01B3/40 ,  B01J23/00 ,  B01J37/03 ,  B01J37/32 ,  C01B3/06 ,  B01J35/10 ,  B01J37/00

Abstract: The invention relates to CeO2 and La2O3 for catalyzing Fe2O3—Al2O3 based chemical-looping reforming of CH4 with CO2 (CL-DRM). The reaction performance of all the composite oxygen carriers was evaluated in a fixed-bed reactor at atmospheric pressure condition. The influencing factors, including temperature and time-on-stream (TOS) were investigated. The characteristics of the oxygen carriers were checked with Brunauer-Emmett-Teller (BET) analysis and X-ray diffraction (XRD). The reducibility of the composite materials was elucidated with temperature-programmed reduction by CH4 (CH4-TPR). Preliminary experimental observations suggest that the simultaneous presence of CeO2 and La2O3 can not only enhance the reactivity of Fe2O3—Al2O3 toward CH4 oxidation and its oxygen releasing rate for fast reaction kinetics, but also improve the reactivity of its reduced form toward CO2 splitting.

公开(公告)号：US10093874B2

公开(公告)日：2018-10-09

申请号：US14663205

申请日：2015-03-19

Applicant: University of Wyoming

Inventor： Maohong Fan ,  Rodolfo Monterrozo

IPC: C10J3/06 ,  C10J3/46 ,  C10J3/02

Abstract: Embodiments described herein generally relate to iron carbonate utilized as a catalyst in coal gasification processes. An FeCO3 catalyst is active in both pyrolysis and gasification operations, and may increase carbon conversion rate and reduce the activation energy of coal gasification. Methods described herein also include suitable processing conditions for performing coal gasification with the FeCO3 catalyst.

公开(公告)号：US10086364B2

公开(公告)日：2018-10-02

申请号：US14749441

申请日：2015-06-24

Applicant: UNIVERSITY OF WYOMING

Inventor： Maohong Fan ,  Tiberiu Popa

IPC: C07C29/149 ,  B01J23/72 ,  B01J19/00 ,  B01J37/03 ,  B01J37/08 ,  B01J35/02 ,  B01J29/064 ,  B01J29/14 ,  B01J29/46

Abstract: Embodiments described herein generally relate to hydrogenation catalysts, syntheses of hydrogenation catalysts, and apparatus and methods for hydrogenation. Methods for forming a hydrogenation catalyst may include mixing a silica generating precursor with a copper precursor and adding an ammonium salt to an end pH of between about 5 to about 9. Methods for hydrogenating an oxalate may include forming a reaction mixture by flowing a hydrogenation catalyst to a reactor, flowing a hydrogen source to the reactor, and flowing an oxalate to the reactor, wherein the hydrogenation catalyst has a particle size between about 10 nm to about 40 nm. Methods may further include reacting the oxalate to form ethylene glycol.