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Majumder K.,Royal Dutch Shell | Mosca G.,Sulzer Chemtech | Mahon K.,Refining NZ
Petroleum Technology Quarterly | Year: 2013

The main fractionator of the crude distillation unit (CDU-1) in the Whangarei refinery of The New Zealand Refining Co (NZRC) was retrofitted with high-capacity internals to increase the unit throughput. Shell Global Solutions International carried out the feasibility study for the expansion of CDU-1. Several options were studied to debottleneck the main fractionators. On the basis of a comparison of the revamp options, NZRC decided to proceed with the ConSep tray alternative due to this option?s lowest capex and most favorable economics. The performance of Shell ConSep trays in the HGO pumparound section of the CDU-1 main fractionators is discussed. Source

Yang Q.,Sulzer Chemtech | Mosca G.,Sulzer AG | Roza M.,Sulzer AG
Chinese Journal of Chemical Engineering | Year: 2010

Though they look very different, UOP SimulFlow™, Koch-Glitsch Ultra-Frac™, Jaeger CoFlo™ and Shell ConSep™ trays fall into the same category of trays using inertial separation technology. However, flooding mechanisms and the trends of entrainment and efficiency are different due to their different working principles. This paper provides a detailed analysis of these trays using available information from literature and U.S. Patents. Efforts are also made to interpret the observations reported. In terms of tray efficiency, it is found that SimulFlow, UltraFrac and CoFlo trays are typical point efficiency devices due to a completely mixed liquid pool on the tray deck, while ConSep trays can take advantage of liquid concentration gradient on the tray deck, which makes this tray attractive among all ultra high capacity trays. © 2010 Chemical Industry and Engineering Society of China (CIESC) and Chemical Industry Press (CIP). Source

Agency: GTR | Branch: EPSRC | Program: | Phase: Research Grant | Award Amount: 2.46M | Year: 2012

The Gas-FACTS programme will provide important underpinning research for UK CCS development and deployment on natural gas power plants, particularly for gas turbine modifications and advanced post combustion capture technologies that are the principal candidates for deployment in a possible tens-of-£billions expansion of the CCS sector between 2020 and 2030, and then operation until 2050 or beyond, in order to meet UK CO2 (carbon dioxide) emission targets. Gas CCS R&D is an emerging field and many of the concepts and underlying scientific principles are still being invented. But on-going UK infrastructure investments and energy policy decisions are being made which would benefit from better information on relevant gas CCS technologies, making independent, fundamental studies by academic researchers a high priority. In addition, the results of this project will provide an essential basis for further work to extract the maximum research benefits from the UK CCS demonstration programme and help to develop more advanced gas CCS technologies for a second tranche of CCS deployment. The programme will also develop rigorous assessment methods and a framework to maximise pathways to impact that could support other RCUK research activities on gas CCS. Globally, there is already interest in gas CCS in Norway, California and the Middle East, and this is likely to become more widespread if cheaper gas leads to more widespread use. This work will be undertaken through work packages with the following aims: WP1: To quantify the scope of gas turbine modifications to improve the technical, environmental and economic performance of integrated CO2 capture on CCGT plants. Small gas turbines will be modified to run with steam or recycled flue gas replacing some of the normal air feed to increase back-end CO2 concentrations (which will help make the CO2 easier to capture). WP2: To quantify through modelling and experimental testing the scope for improving post-combustion capure system performance on CCGT plants through a combination of advanced liquid solvents, including novel amine mixtures, and improved transient performance. Solvents that are used to take up CO2 and then release it in a pure form that can be stored underground will be modified so that the amount of energy required to do this is reduced. The equipment the solvents are used in will also be designed to turn on and off quickly to allow CCS power plants to compensate for fluctuations in output from wind turbines. WP3: In close collaboration with an external Experts Group to undertake integration and whole systems performance assessments. This will include a Gas-FACTS Impact Handbook combining impact tables with state-of-the-art surveys to ensure that pathways to impact pursued by Gas-FACTS researchers are co-ordinated with other significant activities, including excellent science and stakeholder plans, to maximise their effectiveness. Gas-FACTS results will be implemented in the freely-available IECM package for access by any potential users. WP4: Impact delivery and expert interaction activities will be based on establishing an Experts Group including representatives of the UK CCS academic community, global academic community, UK policymakers, UK Regulators, NGOs, power utilities, Original Equipment Manufacturers (OEMs), SMEs (Small and Medium Enterprises). WP4 will also run a programme of engagement activities to impact, including project meetings, specialist meetings on topical issues and results, web-based dissemination and document publication (reports, responses to Parliamentary inquiries, journal papers, articles etc.)

Mosca G.,Technology | Pilling M.W.,Sulzer Chemtech | Hirsch S.,Sulzer Chemtech
AIChE 2013 - 2013 AIChE Spring Meeting and 9th Global Congress on Process Safety, Conference Proceedings | Year: 2013

A discussion on Sulzer Chemtech's new umbrella floating valve, which improves the performances of the fractionation trays, covers the characteristics of this new feature; fields of application; and benefits in terms of column throughput, fractionation stages, and pressure drop. This is an abstract of a paper presented at the 2013 AIChE Spring Meeting & 9th Global Congress on Process Safety (San Antonio, TX 4/28-5/2/2013). Source

Mosca G.,Sulzer Chemtech | Tacchini E.,Sulzer Chemtech
10AIChE - 2010 AIChE Spring Meeting and 6th Global Congress on Process Safety | Year: 2010

The Propylene-Propane (PP) Splitter is the most critical tower among the distillation columns of an ethylene plant. This is even more true in many Russian steam crackers where the PP-Splitters were equipped with "non conventional fractionation trays", providing with poor performances. Thus, the recovery of Propylene was much lower than commonly achieved in modern Plants. A discussion covers a case study illustrating the revamp of the PP-Splitter with the most updated mass transfer technology allowed for a significant boosting of the Propylene recovery; and the revamp approach, including process simulation, selection of the most appropriate fractionation trays, job implementation at site, and the achieved results. This is an abstract of a paper presented at the 2010 Spring National Meeting (San Antonio, TX, 3/21-25/2010). Source

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