Golden, CO, United States
Golden, CO, United States

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Kovarik P.,Czech Technical University | Navratil J.D.,Hazen Research , Inc. | John J.,Czech Technical University
Science and Technology of Nuclear Installations | Year: 2015

Literature review was performed for the molten salt oxidation technology in order to collect all available scientific and engineering information for further use of this technology in nuclear applications. This report provides a summary of a review of scientific and engineering literature on MSO treatment of a wide variety of radioactive wastes, organic compound gasification, and related studies such as radioactive spent salt processing that was found important for further development of the MSO technology in the nuclear field for radioactive waste treatment. Miscellaneous nonnuclear uses of molten salts, such as converting carbon monoxide to carbon dioxide, are not discussed. © 2015 Petr Kovařík et al.


White J.,Hazen Research , Inc. | Olson A.,THOR Treatment Technologies LLC
TMS Annual Meeting | Year: 2014

An Engineering Scale Technology Demonstration (ESTD) unit utilizing the THOR fluidized bed steam reforming technology was built and operated by Hazen Research, Inc. for the purpose of denitrating and solidifying various Department of Energy (DOE) radioactive tank waste surrogates into granular products. The ESTD offered the opportunity to investigate the operational characteristics of two fluidized beds in series to test process system designs such as those for fluidization, feeding, and product collection. Operational characteristics that were evaluated included bed attrition rate, particle growth, and elutriation; and the effects that variations in process parameters (e.g., fluidizing gas flow rate, feed composition, feed injection method, and gas distributor design) had upon these characteristics were observed. Testing of the process systems on this scale allowed for design changes to be made where the cost in time and money were significantly less by comparison to those same modifications being made on the commercial scale.


Gertenbach D.D.,Hazen Research , Inc. | Cooper B.L.,Hazen Research , Inc.
11AIChE - 2011 AIChE Annual Meeting, Conference Proceedings | Year: 2011

As processes developed in the laboratory transition to the continuous demonstration scale, a multitude of technical challenges arise. Solid-liquid separations are among the most common process operations that require large and oft times unanticipated capital and operational costs, due to insufficient development effort in the research phase. Often separation technologies from established industries can be applied to new processes to mitigate the risk involved with scale up. The presentation will focus on Hazen's experience with solid-liquid separations, and present data from flocculation and sedimentation studies performed on pretreated biomass slurries. An economic study will be presented, which addresses the potential capital and operating costs to achieve the desired separation and product recovery.


Mellon R.,Hazen Research , Inc. | Cooper B.L.,Hazen Research , Inc.
10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings | Year: 2010

Biomass based chemical refining represents many new opportunities in engineering and process design. The population of companies seeking to develop their technology is large and diverse, from pure liquid fuel producers to integrated multi-product refineries. A common flow sheet among many of these organizations shows a hybrid biochemical/thermochemical process, whereupon the carbohydrate values in a biomass are removed and the resultant lignin portion is utilized for co-products or process heat. As a company with capabilities in both areas, Hazen Research has conducted a number of experiments to generate data for a hypothetical hybrid process utilized for the biorefining of Lodgepole Pine (Pinus contorta). The presentation will focus on the biochemical operations, biomass pretreatment, hydrolysis and fermentation, as well as thermochemical experiments including pyrolysis and gasification. A cost-benefits analysis will be presented that demonstrates the potential for the hybrid process operations model.


Gertenbach D.,Hazen Research , Inc. | Cooper B.L.,Hazen Research , Inc.
AIChE Annual Meeting, Conference Proceedings | Year: 2010

Benchtop processes that are developed with the intent of being run at the demonstration scale present a multitude of technical challenges. Solid-liquid separations are among the most common process operations that become large and often unanticipated capital and operational costs due to insufficient development effort in the research phase. Often separation technologies from established industries can be applied to new processes to mitigate the risk involved with scale up. The presentation will focus on Hazen's experience with solid-liquid separations, including dissolved air flotation (DAF), counter current decantation (CCD), as well as various incarnations of filtration and centrifugation.


Qiao F.,Hazen Research , Inc. | Wang Z.M.,Hazen Research , Inc. | McCarthy J.,Hazen Research , Inc.
Water Science and Technology: Water Supply | Year: 2013

This paper illustrates the long-term planning challenge for water utilities in the age of conservation using detailed operating data of three sampling entities from the mid 1990s to 2009. The induced behavioral change from conservation measures is found to be of a permanent nature and the unit consumption to be in long-term descent. This in turn may call for a paradigm change in pricing and capacity planning for utilities. The ever-declining per capita consumption alters many commonly acknowledged norms for utilities, in particular for fast growing ones that may have taken on additional financial leverage to support previously anticipated growth. If not managed properly, the full cost recovery mechanism of pricing may force those utilities into an unsustainable future of ever-decreasing total demand and everincreasing cash flow shortfall. Collection of more detailed water demand data in a timely fashion may prove to be a necessary exercise for sound management of median to large water utilities. © IWA Publishing 2013.


May L.D.,Hazen Research , Inc. | Mudgett H.,Hazen Research , Inc.
TMS Annual Meeting | Year: 2014

In the course of developing a new industrial process, information produced at the Research and Development (R&D) stage is critical to determining the technical and economic feasibility of the project. Understanding the fundamental operating parameters for each unit operation in a flowsheet typically comes from historical knowledge of similar systems or by technical development through a robust research program. This approach holds true for processes incorporating fluidized-bed technology. In this paper, the authors will present a practical approach for performing a research study that will allow a process owner to determine if the concept of using a fluidized-bed system can become a reality. Included are discussions of key steps required at each level of the R&D program, and the critical information required for advancing the project to the next stage.


Trademark
Hazen Research , Inc. | Date: 2013-04-29

Bracelets; Earrings; Jewelry; Necklaces.


Trademark
Hazen Research , Inc. | Date: 2013-04-29

Bracelets; Earrings; Jewelry; Necklaces.


Trademark
Hazen Research , Inc. | Date: 2013-04-29

Bracelets; Earrings; Jewelry; Necklaces.

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