scholarly journals Catalysts and Processes for H2S Conversion to Sulfur

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 903
Author(s):  
Daniela Barba
Keyword(s):  
Hydrogen Sulfide ◽  
Natural Gas ◽  
Heavy Oil ◽  
Metallurgical Processes ◽  
Gas Plants

The hydrogen sulfide (H2S) is one of the main byproducts in natural gas plants, refineries, heavy oil upgraders, and metallurgical processes [...]

The Lay-Up and Reactivation of LNG Tankers: Lessons Learned

1994 ◽  
Vol 10 (03) ◽  
pp. 174-183
Author(s):  
John W. Boylston ◽  
Paul J. Riley ◽  
Gary W. Van Tassel
Keyword(s):  
Natural Gas ◽  
Capital Cost ◽  
Lessons Learned ◽  
Inert Gas ◽  
Ballast Tank ◽  
Economic Decisions ◽  
Liquid Natural Gas ◽  
Gas Plants

The Liquid natural gas (LNG) industry went from a projected boom in the 1970's to a contracted industry in the 1980's, when many ships were either permanently or temporarily laid up. In the 1990s, many laid-up LNG carriers are being reactivated after as many as 12 years in lay-up. While the capital cost of an LNG carrier should dictate maximum preservation of the asset, the LNG industry is not immune to having to make hard economic decisions during slack times. In this paper, the authors present specific alternate lay-up procedures, together with the relative costs of these alternatives. LNG carriers are steam vessels, as are many of the vessels in the Ready Reserve Fleet (RRF). However, many of the conclusions reached can also be applied to motor vessels, and as such could be of interest to operators and shipyards in all phases of the RRF program. The subjects of dehumidification, inert gas plants, ballast tank coatings and drydocking, among others, are discussed.

scholarly journals A generic concept for Helium purification and liquefaction plant

2019 ◽  
Vol 2 (1) ◽  
pp. 51-58
Author(s):  
Said Al Rabadi
Keyword(s):  
Natural Gas ◽  
Selective Adsorption ◽  
Process Conditions ◽  
Gas Temperature ◽  
Generic Concept ◽  
Safety Requirements ◽  
Plant Safety ◽  
Pure Helium ◽  
Liquefaction Plant ◽  
Gas Plants

This study describes and evaluates the performance of producing a pure Helium fraction from Helium extraction facility designed for cryogenic natural gas plants. A generic concept for obtaining a Helium pure fraction, which has relatively lower capital and operating costs should be provided. In order to achieve this objective, a new concept for obtaining a Helium pure fraction from a crude Helium fraction, is proposed based on simulations run under diverse process conditions regarding crude Helium gas’ temperature, pressure and composition. This concept is characterized by; reducing the plant safety requirements due to the extensive separation of combustible components, and compact layout of Helium extraction plant. Further re-purification is included in the subsequent Helium liquefaction step through selective adsorption, hence then increasing the purity of the Helium product and reducing the plant energy consumption required for liquefying Helium-rich fraction and the valuable Helium boil-off routed from the storage facility. The Nitrogen-rich fraction is routed to Nitrogen liquefaction installation. Liquid Nitrogen is generated within Helium recovery facility for liquid Helium shielding and container cooling. Surplus gaseous Nitrogen either can be liquefied and used within cryogenic natural gas plant as process coolant or be vented to atmosphere.

scholarly journals First-principles microkinetic study of methane and hydrogen sulfide catalytic conversion to methanethiol/dimethyl sulfide on Mo6S8 clusters: activity/selectivity of different promoters

2019 ◽  
Vol 9 (17) ◽  
pp. 4573-4580 ◽  
Author(s):  
Adam A. Arvidsson ◽  
William Taifan ◽  
Anders Hellman ◽  
Jonas Baltrusaitis
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Sulfide ◽  
Natural Gas ◽  
First Principles ◽  
Dimethyl Sulfide ◽  
Large Fraction ◽  
Catalytic Conversion ◽  
Sour Gas

A large fraction of the global natural gas reserves is in the form of sour gas, i.e. contains hydrogen sulfide (H2S) and carbon dioxide (CO2), and needs to be sweetened before utilization.

Turning NGCC Into IGCC: Cycle Retrofitting Issues

2006 ◽  
Author(s):  
Juan Pablo Gutierrez ◽  
Terry B. Sullivan ◽  
Gerald J. Feller
Keyword(s):  
Natural Gas ◽  
Gas Turbines ◽  
Power Plants ◽  
Combined Cycle ◽  
Integrated Gasification Combined Cycle ◽  
Water Steam ◽  
Power Block ◽  
Starting Point ◽  
Natural Gas Combined Cycle ◽  
Gas Plants

The increase in price of natural gas and the need for a cleaner technology to generate electricity has motivated the power industry to move towards Integrated Gasification Combined Cycle (IGCC) plants. The system uses a low heating value fuel such as coal or biomass that is gasified to produce a mixture of hydrogen and carbon monoxide. The potential for efficiency improvement and the decrease in emissions resulting from this process compared to coal-fired power plants are strong evidence to the argument that IGCC technology will be a key player in the future of power generation. In addition to new IGCC plants, and as a result of new emissions regulations, industry is looking at possibilities for retrofitting existing natural gas plants. This paper studies the feasibility of retrofitting existing gas turbines of Natural Gas Combined Cycle (NGCC) power plants to burn syngas, with a focus on the water/steam cycle design limitations and necessary changes. It shows how the gasification island processes can be treated independently and then integrated with the power block to make retrofitting possible. This paper provides a starting point to incorporate the gasification technology to current natural gas plants with minor redesigns.

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