scholarly journals The R&D of a Novel Sulfur Tolerant CO Shift Catalyst and Its Application in the Integrated Low Water Gas Ratio Process

2017 ◽  
Vol 07 (04) ◽  
pp. 113-122
Author(s):  
Bonan Liu ◽  
Jiefei Xiao ◽  
Tiancun Xiao ◽  
Qiuyun Zong
Keyword(s):  
Water Gas ◽  
Shift Catalyst ◽  
Gas Ratio

Novel sour water gas shift catalyst (SWGS) for lean steam to gas ratio applications

2015 ◽  
Vol 134 ◽  
pp. 65-72 ◽  
Author(s):  
Bonan Liu ◽  
Qiuyun Zong ◽  
Xian Du ◽  
Zhaoxi Zhang ◽  
Tiancun Xiao ◽  
...  
Keyword(s):  
Water Gas Shift ◽  
Water Gas ◽  
Shift Catalyst ◽  
Gas Ratio ◽  
Sour Water

Forecasting the Water Flooding for the Production Wells of a Gas Condensate Field with a Fractured Reservoir Type

2021 ◽  
Author(s):  
Pavel Dmitrievich Gladkov ◽  
Anastasiia Vladimirovna Zheltikova
Keyword(s):  
Produced Water ◽  
Fractured Reservoirs ◽  
Gas Condensate ◽  
Water Flooding ◽  
Fractured Reservoir ◽  
Well Performance ◽  
Integrated Monitoring ◽  
Field Development ◽  
Water Gas ◽  
Gas Ratio

Abstract As is known, fractured reservoirs compared to conventional reservoirs have such features as complex pore volume structure, high heterogeneity of the porosity and permeability properties etc. Apart from this, the productivity of a specific well is defined above all by the number of natural fractures penetrated by the wellbore and their properties. Development of fractured reservoirs is associated with a number of issues, one of which is related to uneven and accelerated water flooding due to water breakthrough through fractures to the wellbores, for this reason it becomes difficult to forecast the well performance. Under conditions of lack of information on the reservoir structure and aquifer activity, the 3D digital models of the field generated using the hydrodynamic simulators may feature insufficient predictive capability. However, forecasting of breakthroughs is important in terms of generating reliable HC and water production profiles and decision-making on reservoir management and field facilities for produced water treatment. Identification of possible sources of water flooding and planning of individual parameters of production well operation for the purpose of extending the water-free operation period play significant role in the development of these reservoirs. The purpose of this study is to describe the results of the hydrochemical monitoring to forecast the water flooding of the wells that penetrated a fractured reservoir on the example of a gas condensate field in Bolivia. The study contains data on the field development status and associated difficulties and uncertainties. The initial data were results of monthly analyses of the produced water and the water-gas ratio dynamics that were analyzed and compared to the data on the analogue fields. The data analysis demonstrated that first signs of water flooding for the wells of the field under study may be diagnosed through the monitoring of the produced water mineralization - the water-gas ratio (WGR) increase is preceded by the mineralization increase that may be observed approximately a month earlier. However, the data on the analogue fields shows that this period may be longer – from few months to two years. Thus, the hydrochemical method within integrated monitoring of development of a field with a fractured reservoir could be one of the efficient methods to timely adjust the well operation parameters and may extend the water-free period of its operation.

Energy and exergy analysis of a downstream single-row air washer at different droplet diameters for air cooling application

2022 ◽  
pp. 095440622110645
Author(s):  
Minhua Huang ◽  
Haiqiao Wang ◽  
Feng Tian ◽  
Junxin Huang ◽  
Shiqiang Chen ◽  
...  
Keyword(s):  
Performance Indicator ◽  
Droplet Diameter ◽  
Exergy Efficiency ◽  
Air Cooling ◽  
Design Calculation ◽  
Outlet Temperature ◽  
Single Row ◽  
Energy And Exergy ◽  
Water Gas ◽  
Gas Ratio

This study proposes a downstream single-row air washer for air cooling. The theoretical energy and exergy balance models were established at different droplet diameters and verified by the experimental data. Based on the abovementioned theoretical relationship, the single performance indicator of heat exchange efficiency (HEE) and exergy efficiency was quantitatively analyzed; a comprehensive analysis method of two indicators was proposed, combining HEE and exergy efficiency, and a numerical simulation was carried out. Results show that the smaller the droplet diameter and the larger the water–air ratio, the lower the dry-bulb temperature of the outlet air and the higher the HEE and exergy flux destruction. When the droplet diameter is less than 440 μm, the droplet diameter does not affect exergy efficiency and dry-bulb temperature. When the droplet diameter is larger than 440 μm, the droplet diameter is positively correlated with the air outlet dry-bulb temperature and exergy efficiency; in contrast, the water–gas ratio is negatively correlated with the air outlet dry-bulb temperature. An engineering case reveals that when the air outlet temperature is less than 34°C, the critical water–gas ratio can be set as 2.6 (mass ratio). At this time, the HEE is more than 90%, the exergy efficiency is more than 60%, and the critical value of droplet diameter is 440 μm. The research results provide an essential theoretical basis for the optimization of engineering design calculation.

scholarly journals Analysis of mass transfer processes in a reactor during a loss-of-coolant accident

2018 ◽  
Vol 4 (2) ◽  
pp. 149-154
Author(s):  
Aleksey Kulikov ◽  
Andrey Lepyokhin ◽  
Vitaly Polunichev
Keyword(s):  
Time Interval ◽  
Initial Water ◽  
Pressurized Water ◽  
The Core ◽  
Maximum Time ◽  
Loss Of Coolant Accident ◽  
Safe State ◽  
Loss Of Coolant ◽  
Water Gas ◽  
Gas Ratio

The purpose of the work was to optimize the parameters of the spillage system equipped with a gas pressure hydroaccumulator for a ship pressurized water reactor in a loss-of-coolant accident. The water-gas ratio in the hydroaccumulator and the hydraulic resistance of the path between the hydroaccumulator and the reactor were optimized at the designed hydroaccumulator geometric volume. The main dynamic processes were described using a mathematical model and a computational analysis. A series of numerical calculations were realized to simulate the behavior dynamics of the coolant level in the reactor during the accident – by varying the optimized parameters. Estimates of the minimum and maximum values of the coolant level were obtained: depending on the initial water-gas ratio in the hydroaccumulator at different diameters of the flow restrictor on the path between the hydroaccumulator and the reactor. These results were obtained subject to the restrictive conditions that, during spillage, the coolant level should remain above the core and below the blowdown nozzle. The first condition implies that the core is in safe state, the second excludes the coolant water blowdown. The optimization goal was to achieve the maximum time interval in which these conditions would be satisfied simultaneously. The authors propose methods for selecting the optimal spillage system parameters; these methods provide the maximum time for the core to be in a safe state during a loss-of-coolant accident at the designed hydroaccumulator volume. Using these methods, it is also possible to make assessments from the early stages of designing reactor plants.

Cobalt Chromium Oxide: A Novel Sulphur Tolerant Water-Gas Shift Catalyst

1990 ◽  
Vol 63 (1) ◽  
pp. L11-L16 ◽  
Author(s):  
Richard G. Copperthwaite ◽  
Frank M. Gottschalk ◽  
Tarnya Sangiorgio ◽  
Graham J. Hutchings*
Keyword(s):  
Chromium Oxide ◽  
Water Gas Shift ◽  
Cobalt Chromium ◽  
Water Gas ◽  
Shift Catalyst

Deactivation, Regeneration, and Stable Performance of a PtMoRe Water Gas Shift Catalyst for On-Site Hydrogen Generation: Part 2

2008 ◽  
Vol 51 (1-4) ◽  
pp. 68-75 ◽  
Author(s):  
Lucas Dorazio ◽  
Wolfgang Ruettinger ◽  
Marco J. Castaldi ◽  
Robert Farrauto
Keyword(s):  
Hydrogen Generation ◽  
Water Gas Shift ◽  
Stable Performance ◽  
Water Gas ◽  
Shift Catalyst
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