General Electric Company

Bl Technologies, Inc.

Anthony Yu-Chung Ku

James Anthony Ruud

Vidya Ramaswamy

Mohan Manoharan

Seth Thomas Taylor

Kevin Paul McEvoy

Sergio Paulo Martins Loureiro

Melissa Suzanne Sander

Patrick Daniel Willson

Xi Yang

Milivoj Konstantin Brun

William Hullinger Huber

Reed Roeder Corderman

Tao Li

David M Polizzotti

Roger Allen Shisler

John Patrick Pollinger

Matthew Alan Petersen

Parag Parkash Kulkarni

Anoop Muralidhara Kurup

Wei Wei

Ke Liu

Frederic Joseph Klug

Peter Micah Sandvik

Parag Prakash Kulkarni

Hrishikesh Keshavan

Vinayak Tilak

Anis Zribi

Michael John Bowman

Wei-Cheng Tian

Steven Alfred Tysoe

John Thomas Leman

Harish Radhakrishna Acharya

Ryan Christopher Mills

Yan Gao

Scott Michael Miller

Steven Mitchell Kuznicki

Patrick Roland Lucien Malenfant

Louis Andrew Schick

Peter Kennedy Davis

Nicholas Edward Antolino

Jennifer Lynn Molaison

Abdul Rafi Khwaja

Hope Matis

William Cook Livingood, Iii

Jeffrey Lynn Schworm

Geoffrey Mark Eadon

Brian Christopher Moore

William Leonard Kostedt, Iv

Weizhu An

Gary C Buczkowski

Lan Wu

Paul Donald Swenson

Carl Vess

Kalya Vijaya Sarathy

Krzysztof Slowinski

Randall Scott Hagerdon

Zachary Kenneth Mowry

Kevin Paul Mcevoy

William Leonard Kostedt

Disclosed herein are methods of forming substantially crystalline, dense silicon carbide fibers from infusible polysilazane fibers by utilizing a single stage pyrolysis. The pyrolysis is performed using a continuous process in a single furnace with a constant atmospheric condition. Also disclosed are substantially crystalline, dense silicon carbide fibers formed by these methods.

Method to form silicon carbide fibers by single stage pyrolysis of polysilazane precursors

In a process and apparatus for treating produced water, the produced water flows through a series of treatment units. A portion of the produced water may by-pass one or more of the treatment units but the by-pass portion may be such that the treated water is still acceptable, for example for discharge or reuse. Concentrations of oil and grease, organic carbon, silica, pH or related parameters in the produced water may be monitored and used to control the process or apparatus. Control of the process may involve one or more of altering a by-pass portion, altering the addition of chemicals, and altering the operation of a unit process. The process may be controlled to respond to upset conditions, or such that the concentration of one or more limiting contaminants is near, but not over, a specified maximum for re-use or discharge.

Monitoring and control of unit operations for generating steam from produced water

Methods for forming ceramic cores are disclosed. A ceramic core formed using the method of the present application includes a silica depletion zone encapsulating an inner zone. The inner zone includes mullite and the silica depletion zone includes alumina. The method includes heat-treating a ceramic body in a non-oxidizing atmospheric condition for an effective temperature and time combination at a pressure less than 10atmosphere to form the silica depletion zone at a surface of the ceramic core.

Methods for forming ceramic cores

The present disclosure generally relates to a ceramic core comprising predominantly mullite, which is derived from a precursor comprising alumina particles and siloxane binders. Free silica is present in the ceramic body, but is largely unavailable for reaction with metal alloys used in investment casting. Methods of making cast metal articles are also disclosed.

Compositions for cores used in investment casting

Systems and methods for removing organic contaminants from water may be used, for example, to treat produced water from a steam assisted heavy oil recovery operation. The treated produced water may be re-used to create steam. Alternatively, the produced water may be a blowdown stream treated to facilitate further treatment in a thermal crystallizer. The treatments may include pH adjustment or separating de-solubilized organics or both. Other treatments may include one or more of oxidation, sorption and biological treatments. The treatments may be used alone or in various combinations. One exemplary combination includes reducing the pH of produced water, separating de-solubilized organics from the produced water, and oxidizing the produced water or contacting the produced water with activated carbon.

Produced water treatment to remove organic compounds

Processes for fabricating ceramic membranes include providing a porous substrate having at least one inner channel extending therethrough and having surfaces defined by porous walls, depositing a coating slurry on surfaces of the inner channel(s), and sintering. Sintering temperatures for the processes range from about 400&#xb0; C. to 800&#xb0; C. Coating slurries for use in the processes include a boehmite sol and a colloidal suspension of porous alumina particles.

Ceramic membranes

A hybrid multichannel porous structure for processing between two fluid streams of different compositions includes a housing and one or more structures disposed within the cavity of the housing in a shell and tube configuration. Each structure includes a body made of a porous, inorganic material and a plurality of channels for processing an optional sweep stream. Each channel is coated with a membrane layer. A feed stream introduced into the housing is in direct contact with the structures such that a gas selectively permeates through the body and into the channels. The gas combines with the sweep stream to form a permeate that exits from each channel. The remaining feed stream forms a retentate that exits from the housing. The feed stream may consist of syngas containing hydrogen gas and the sweep stream may contain nitrogen gas. A power plant that incorporates the hybrid structure is disclosed.

Hybrid multichannel porous structure for hydrogen separation

A free-standing zeolite membrane and a zeolite membrane supported on a support structure are disclosed. The free-standing zeolite membrane is fabricated by mixing zeolite particles and an optional inorganic binder, forming a green body, and sintering the green body at a sufficiently low temperature so as to prevent damage to the gas selectivity properties of the zeolite particles. The supported composite zeolite membrane is fabricated by mixing a sacrificial binder, an optional inorganic binder, boehmite sol and zeolite particles to form a slurry. The slurry is then coated onto a porous support structure, dried and sintered at a sufficiently low temperature so as to prevent damage to the gas selective properties of the zeolite particles. In both membranes, the zeolite particles span the entire thickness of the membrane to provide a high selectivity path for the flow of gas to pass therethrough.

Zeolite membrane and methods of making the same

A porous membrane structure is disclosed, which includes a porous substrate, a mesoporous, aluminum oxide layer disposed on the substrate; and a relatively thin, continuous, microporous barrier layer disposed on the mesoporous aluminum oxide layer, also formed from aluminum oxide. The membrane is capable of improving hydrogen selectivity within a gas stream, e.g., a synthesis gas composition. Membrane supports containing these structures are also described, as well as gas separation modules, and related processes. Power plants which incorporate the gas separation modules are also disclosed herein.

Membranes suitable for gas separation, and related articles and processes

A syngas cleanup section includes a water-gas shift reactor, a first operation unit and a second operation unit. The first operation unit includes a high permeance membrane with H/COselectivity in flow communication with the water-gas shift reactor to provide a H-rich permeate stream and an H-poor retentate stream. The second operation unit recovers Hand CO from the retentate stream to produce a single, CO-rich product stream, the entire content of which has a minimum pressure of at least about 10.0 bar. In one embodiment, the second operation unit includes a membrane with Knudsen selectivity for permeating H, CO and CO. In this embodiment, the permeate streams are combined to produce a Hand CO-rich fuel stream used by a combined cycle power generation unit to produce electricity, and the retentate stream is sent to a catalytic oxidation unit to produce the CO-rich product stream. In another embodiment, the second operation unit is the catalytic oxidation unit.

Syngas cleanup section with carbon capture and hydrogen-selective membrane

In some embodiments, the present invention is directed to methods of making structures with complex functional architectures, where such structures generally comprise at least two mesoporous regions comprising different chemical activity, and where such methods afford spatial control over the placement of such regions of differing chemical activity. In some embodiments, the present invention is also directed to the structures formed by such methods, where such structures are themselves novel.

Mesoporous membranes with complex functional architectures and methods for making

A membrane structure is provided. The membrane structure includes a polymer layer having a plurality of pores; and a ceramic layer disposed on the polymer layer. The ceramic layer has a plurality of substantially unconnected pores. Each of the substantially unconnected pores is in fluid communication with at least one of the pores of the polymer layer. A method of manufacturing a membrane structure is provided. The method includes the steps of providing a polymer layer having a plurality of pores; and disposing a ceramic layer on the polymer layer. Disposing a ceramic layer includes depositing a metal layer on the polymer layer; and anodizing the metal layer to convert the metal layer into a porous layer. At least one of the depositing step and the anodizing step is performed as a continuous process. Alternatively, at least one of the depositing and the anodizing step is performed as a batch process.

Membrane structure and method of making

A membrane structure is provided. The membrane structure includes a first layer having a plurality of interconnected pores; and a second layer disposed on the first layer. The second layer has a plurality of unconnected pores. Each of the unconnected pores is in fluid communication with at least one of the interconnected pores of the first layer. A method of making a membrane structure is provided. The method includes the steps of providing a first layer having a plurality of interconnected pores; and disposing a second layer on the first layer. Disposing a second layer includes depositing a conducting layer on the first layer; and anodizing the conducting layer to convert the conducting layer into a porous layer.

An apparatus for separating at least one component from a mixture of a plurality of chemical species is provided. The apparatus comprises a membrane structure comprising a plurality of pores disposed within a matrix material to allow mass transport from a first surface of the membrane structure to a second surface of the membrane structure. The matrix material has a thermal conductivity of at least about 10 W/m/K; and a functional material disposed within at least a portion of the plurality of pores. The functional material has the property of promoting selective transport of at least one species through the membrane structure from the first surface to the second surface.

Gas separator apparatus

Growing community of inventors

Rexford, NY, United States of America

Anthony Yu-Chung Ku