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The Chemistry of Sulfur in Fluid Catalytic Cracking
Catalytic Reduction of Sulfur in Fluid Catalytic Cracking Rick Wormsbecher Collaborators Grace Davison Laboratoire Catalyse et Spectrochimie, CNRS, Université de Caen Ruizhong Hu Michael Ziebarth Fabian Can Wu-Cheng Cheng Francoise Maugé Robert H. Harding Arnaud Travert Xinjin Zhao Terry Roberie Ranjit Kumar Thomas Albro Robert Gatte Outline • Review of fluid catalytic cracking. • Sulfur balance and sulfur cracking chemistry. • Catalytic reduction of sulfur by Zn aluminate/alumina. Fluid Catalytic Cracking • Refinery process that “cracks” high molecular weight hydrocarbons to lower molecular weight. • Refinery process that provides ~50 % of all transportation fuels indirectly. • Provides ~35 % of total gasoline pool directly from FCC produced naphtha. • ~80 % of the sulfur in gasolines comes from the FCC naphtha. Sulfur in Gasoline • Sulfur compounds reversibly poison the auto emission catalysts, increasing NOx and hydrocarbon emission. SOx emissions as well. • World-wide regulations to limit the sulfur content of transportation fuels. – 10 - 30 ppm gasoline. • Sulfur can be removed by hydrogenation chemistry. – Expensive. – Lowers fuel quality. Fluid Catalytic Cracking Unit Products Riser Flue Gas Reactor (~500 ºC) Regenerator (~725 ºC) Reaction is endothermic. 400 tons Catalyst circulates from catalyst Riser to Regenerator. inventory 50, 000 Air Feedstock barrels/day Carbon Distribution H2 ~0.05 % Flare C1 ~1.0 % Flare Petrochem Feed C2-C4 ~14-18 % Naphtha MW ~330 g/mole C5-C11 ~50 % C12-C22 ~15-25 % LCO C22+ ~5-15 % HCO Coke ~3-10 % -
Catalyst Precursors for Hydrodesulfurization Synthesized in Supercritical Fluids Manuel Théodet
New generation of ”bulk” catalyst precursors for hydrodesulfurization synthesized in supercritical fluids Manuel Théodet To cite this version: Manuel Théodet. New generation of ”bulk” catalyst precursors for hydrodesulfurization synthesized in supercritical fluids. Material chemistry. Université Sciences et Technologies - Bordeaux I,2010. English. NNT : 2010BOR14092. tel-00559113 HAL Id: tel-00559113 https://tel.archives-ouvertes.fr/tel-00559113 Submitted on 24 Jan 2011 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives| 4.0 International License N° d’ordre : 4092 THÈSE présentée à L’UNIVERSITÉ BORDEAUX I ÉCOLE DOCTORALE DES SCIENCES CHIMIQUES Par Manuel THEODET Ingénieur ENSCPB POUR OBTENIR LE GRADE DE DOCTEUR SPÉCIALITÉ : Physico-Chimie de la Matière Condensée ___________________ NOUVELLE GENERATION DE PRECURSEURS « BULK » DE CATALYSEUR D’HYDRODESULFURATION SYNTHETISES EN MILIEU FLUIDE SUPERCRITIQUE ___________________ NEW GENERATION OF « BULK » CATALYST PRECURSORS FOR HYDRODESULFURIZATION SYNTHESIZED IN SUPERCRITICAL FLUIDS ___________________ Co-superviseurs de recherche : Cristina Martínez & Cyril Aymonier Soutenue le 03 Novembre 2010 Après avis favorable de : M. E. PALOMARES, Professor, UPV, Valencia, Spain Rapporteurs M. M. TÜRK, Professor, KIT, Karlsruhe, Germany Devant la commission d’examen formée de : M. -
Exxonmobil Torrance Refinery Electrostatic Precipitator Explosion Torrance, California
InvestigationInvestigation Report Report ExxonMobil Torrance Refinery Electrostatic Precipitator Explosion Torrance, California Incident Date: February 18, 2015 On-Site Property Damage, Catalyst Particles Released to Community, Near Miss in MHF Alkylation Unit No. 2015-02-I-CA KEY ISSUES: • Lack of Safe Operating Limits and Operating Procedure • Safeguard Effectiveness • Operating Equipment Beyond Safe Operating Life • Re-use of Previous Procedure Variance Without Sufficient Hazard Analysis Published May 2017 CSB · ExxonMobil Torrance Refinery Investigation Report The U.S. Chemical Safety and Hazard Investigation Board (CSB) is an independent Federal agency whose mission is to drive chemical safety change through independent investigations to protect people and the environment. The CSB is a scientific investigative organization; it is not an enforcement or regulatory body. Established by the Clean Air Act Amendments of 1990, the CSB is responsible for determining accident causes, issuing safety recommendations, studying chemical safety issues, and evaluating the effectiveness of other government agencies involved in chemical safety. More information about the CSB is available at www.csb.gov. The CSB makes public its actions and decisions through investigative publications, all of which may include safety recommendations when appropriate. Examples of the types of publications include: CSB Investigation Reports: formal, detailed reports on significant chemical accidents and include key findings, root causes, and safety recommendations. CSB Investigation Digests: plain-language summaries of Investigation Reports. CSB Case Studies: examines fewer issues than a full investigative report, case studies present investigative information from specific accidents and include a discussion of relevant prevention practices. CSB Safety Bulletins: short, general-interest publications that provide new or timely information intended to facilitate the prevention of chemical accidents. -
Olefins Recovery CRYO–PLUS ™ TECHNOLOGY 02
Olefins Recovery CRYO–PLUS ™ TECHNOLOGY 02 Refining & petrochemical experience. Linde Engineering North America Inc. (LENA) has constructed more than twenty (20) CRYO-PLUS™ units since 1984. Proprietary technology. Higher recovery with less energy. Refinery configuration. Designed to be used in low-pressure hydrogen-bearing Some of the principal crude oil conversion processes are off-gas applications, the patented CRYO-PLUS™ process fluid catalytic cracking and catalytic reforming. Both recovers approximately 98% of the propylene and heavier processes convert crude products (naphtha and gas oils) components with less energy required than traditional into high-octane unleaded gasoline blending components liquid recovery processes. (reformate and FCC gasoline). Cracking and reforming processes produce large quantities of both saturated and Higher product yields. unsaturated gases. The resulting incremental recovery of the olefins such as propylene and butylene by the CRYO-PLUS™ process means Excess fuel gas in refineries. that more feedstock is available for alkylation and polym- The additional gas that is produced overloads refinery erization. The result is an overall increase in production of gas recovery processes. As a result, large quantities of high-octane, zero sulfur, gasoline. propylene and propane (C3’s), and butylenes and butanes (C4’s) are being lost to the fuel system. Many refineries Our advanced design for ethylene recovery. produce more fuel gas than they use and flaring of the ™ The CRYO-PLUS C2= technology was specifically excess gas is all too frequently the result. designed to recover ethylene and heavier hydrocarbons from low-pressure hydrogen-bearing refinery off-gas streams. Our patented design has eliminated many of the problems associated with technologies that predate the CRYO-PLUS C2=™ technology. -
Advanced Multivariable Control of a Turboexpander Plant
Bryan Research and Engineering, Inc. - Technical Papers Advanced Multivariable Control of a Turboexpander Plant DAN ALTENA, MICHAEL HOWARD, Union Pacific Resources Group, Inc. KEITH BULLIN, JOEL CANTRELL, Bryan Research & Engineering, Inc., Bryan, Texas ABSTRACT This paper describes an application of advanced multivariable control on a natural gas plant and compares its performance to the previous conventional feed-back control. This control algorithm utilizes simple models from existing plant data and/or plant tests to hold the process at the desired operating point in the presence of disturbances and changes in operating conditions. The control software is able to accomplish this due to effective handling of process variable interaction, constraint avoidance, and feed- forward of measured disturbances. The economic benefit of improved control lies in operating closer to the process constraints while avoiding significant violations. The South Texas facility where this controller was implemented experienced reduced variability in process conditions which increased liquids recovery because the plant was able to operate much closer to the customer specified impurity constraint. An additional benefit of this implementation of multivariable control is the ability to set performance criteria beyond simple setpoints, including process variable constraints, relative variable merit, and optimizing use of manipulated variables. The paper also details the control scheme applied to the complex turboexpander process and some of the safety features included to improve reliability. Proceedings of the Seventy-Seventh GPA Annual Convention. Tulsa, OK: Gas Processors Association, 1998. Bryan Research & Engineering, Inc. Visit our Engineering Resources page for more articles. INTRODUCTION The UPR Gulf Plains Plant located 13 miles northwest of Bishop, Texas has been processing gas from the nearby Stratton gas field for more than 50 years. -
Computational Fluid Flow Analysis of Cryogenic Turboexpander
Computational Fluid Flow Analysis of Cryogenic Turboexpander A Thesis Submitted in Partial Fulfilment of the Requirements for the Award of the Degree of Master of Technology in Thermal Engineering by Hitesh Dimri Department of Mechanical Engineering National Institute of Technology, Rourkela Rourkela-769008, Odisha, INDIA May 2013 Computational Fluid Flow Analysis of Cryogenic Turboexpander A Thesis Submitted in Partial Fulfilment of the Requirements for the Award of the Degree of Master of Technology in Thermal Engineering by Hitesh Dimri (Roll – 211ME3188) Under the Guidance of Prof. Ranjit Kumar Sahoo Department of Mechanical Engineering National Institute of Technology, Rourkela Rourkela-769008, Odisha, INDIA 2011-2013 DEPARTMENT OF MECHANICAL ENGINEERING NATIONAL INSTITUTE OF TECHNOLOGY ROURKELA, ODISHA-769008 CERTIFICATE This is to certify that the thesis entitled “Computational Fluid Flow Analysis of Cryogenic Turboexpander” by Hitesh Dimri, submitted to the National Institute of Technology (NIT), Rourkela for the award of Master of Technology in Thermal Engineering, is a record of bona fide research work carried out by him in the Department of Mechanical Engineering, under my supervision and guidance. I believe that this thesis fulfills part of the requirements for the award of degree of Master of Technology. The results embodied in the thesis have not been submitted for the award of any other degree elsewhere. Place: Rourkela Prof. Ranjit Kumar Sahoo Date: Department of Mechanical Engineering National Institute of Technology Rourkela Odisha-769008 i ACKNOWLEDGEMENT I am extremely fortunate to be involved in an exciting and challenging research project like “Computational Fluid Flow Analysis of Cryogenic Turboexpander”. It has enriched my life, giving me an opportunity to work in a new environment of ANSYS CFX. -
ADVANCES in FLUID CATALYTIC CRACKING (November 2005)
Abstract Process Economics Program Report 195A ADVANCES IN FLUID CATALYTIC CRACKING (November 2005) Recent emphasis in fluid catalytic cracking is on maximum light olefins production, gasoline sulfur reduction and compliance with FCCU NOx and SOx emissions requirements. New cracking catalysts and additives for the reduction of NOx, SOx and gasoline sulfur continue to significantly improve FCCU operation. New hardware designs offer improved unit operation and efficiency. Areas of recent new hardware design improvements include the standpipe inlet, third stage cyclones, spent catalyst distributor and catalyst stripping. Wet gas scrubbers or selective catalytic reduction may now be required in some cases to meet emissions requirements. This report provides an overview of FCC developments in catalyst, process and hardware technologies since PEP Report 195, Advances in Fluid Catalytic Cracking, issued in 1991. The report then develops process economics for cracking the most common type of FCC feedstock, vacuum gas oil. PEP Report 228, Refinery Residue Upgrading, issued in 2000 reviews the special issues and technology of Residual Fluid Catalytic Cracking (RFCC) and develops process economics for cracking a residual feedstock. Since the refinery production of light olefins such as propylene offers refiners in some regions, especially Asia and Western Europe, an opportunity for profit, the process economics of maximum light olefins FCC from VGO are developed. Air emissions (SOX, NOX) from FCCUs and the reduction of FCC gasoline sulfur are major environmental issues discussed. Professionals and managers involved in the energy industry who manage, research, develop, plan, operate, design plants or manage investments in the petroleum refining and allied industries could benefit from the information contained in this report. -
Turbo Expander Technology Contribution in Development of Ethylene Plant Process
Turbo Expander Technology Contribution in Development of Ethylene Plant Process Agahi, Reza Atlas Copco Gas and Process Irvine, CA, USA Ershaghi, Behrooz Atlas Copco Gas and Process Reza Agahi is Marketing Manager and responsible for Irvine, CA, USA worldwide business development of geothermal and waste heat energy recovery for Atlas Copco, Gas and Process Division. Behrooz Ershaghi is presently VP R&D at Atlas Copco Gas He has more than 30 years’ experience in turbo expander and Process. He has held several positions over his 40 years design, its applications in cryogenic plants and energy career in Gas processing, Turboexpander and Rotating recovery. He has taught in universities in Southern California equipment industries with Atlas Copco and GE Oil & Gas. and has authored more than 40 articles and papers in system Behrooz has authored several papers in Turboexpander design engineering, expander applications and energy recovery. Dr. and applications and co-inventor of several GE Rotoflow and Agahi is the inventor or co-inventor of several Rotoflow Atlas Copco Rotoflow patents. He received his B. S. in expander patents. Chemical Engineering from Tehran Polytechnic, M. S. in Petroleum Engineering, and PhD in Chemical Engineering, from the University of Southern California. Al Halaki, Saleh Chief Project & Engineering Officer (CPEO) Major projects Dept. Qatar Petrochemical Company (QAPCO) Doha, Qatar Mayne, Trevor Lead Machinery Engineer Saleh Al Halaki has vast experience in petrochemical industry. Qenos Altona Olefins For the past 27 years associated with QAPCO from Trainee Melbourne, Victoria, Australia Engineer to current position as CPEO. Joined QAPCO in 1988 as Trainee Engineer and held several Trevor Mayne is the Lead Machinery Engineer for the Qenos positions in Plant Operation & Projects Management during Altona Olefins refinery. -
How to Choose the Best Expansion Turbine ?
Kalina & Organic Rankine Cycles: How to Choose the Best Expansion Turbine ? Dr Frédéric Marcuccilli, Senior Process Engineer Hervé Mathiasin, Sales Engineer Electricity generation from Enhanced Geothermal Systems Strasbourg 14-16th of September, 2006 www.cryostar.com [email protected] 1 Contents 1. General Presentation 1.1 Cryostar in figures 1.2 Cryostar in the market place 1.3 Cryostar new markets 2. Radial Turbines for Binary Cycles 2.1 Radial inflow turbine 2.2 Expander wheel design 2.3 Designing for best efficiency 2.4 Sealing system 3. ORC Cycle Optimisation 4. Conclusion 2 1. General Presentation Who is Cryostar ? 350 employees 1.1 Cryostar in figures 145 Million € turnover in FY 2006 90% export 15 Million € investments in 2005-07 Part of the new Skid mounted HC turboexpanders Boil-Off gas reliquefaction unit High pressure reciprocating pump 3 1. General Presentation 1.2 Cryostar in the market place Recognised as worldwide experts in the following areas: Industrial gases No.1 in the application of cryogenic and industrial gas pump sectors Oil & Gas One major supplier of turbo-expander/compressors in oil & gas treatment (HC dewpointing, ethylene plants) LNG carriers Oil & Gas LNG No.1 in « boil-off » gas handling and recovery (90% market Clean energy share) Energy recovery Industrial gas Principal supplier of energy recovery expanders for « geo- pressure » application on natural gas grids (30 MW installed in Europe in the last 20 years plus North America ongoing) 4 1. General Presentation 1.3 Cryostar new markets Geothermal and heat recovery expansion turbines TG: Turboexpander generator type In construction: one TG500 delivering ca 3.3 MWelec for Siemens Kalina cycle in Unterhaching (Bavaria/Germany) Ongoing project: other TG500 for Siemens Kalina cycle in Offenbach/Bellheim Pre-selected for Soultz Hot Dry Rock ORC Project Pre-selected for Innamincka Kalina Project 5 2. -
THE H-OIL PROCESS: a Worldwxide LEADER in VACUUM RESIDUE HYDROPROCESSING” \ ^
—t&CR I'd, D 3 YJj TT-097 CONEXPO ARPEL '96 . i ' 1 "THE H-OIL PROCESS: A WORLDWXiDE LEADER IN VACUUM RESIDUE HYDROPROCESSING” \ ^ J.J. Colyar1 L.I. Wisdom2 A. Koskas3 SUMMARY With the uncertainty of market trends, refiners will need to hedge their investment strategies in the future by adding processing units that provide them with flexibility to meet the changing market. The various process configurations involving the H-Oil® Process described in this paper have been tested commercially and provide the refiner with the latest state of the art technology. ABSTRACT The H-Oil® Process is a catalytic hydrocracking process, invented by HRI, Inc., a division of IFP Enterprises, Inc. which is used to convert and upgrade petroleum residua and heavy oils. Today the H-Oil Process accounts for more than 50 percent of the worldwide vacuum residue hydroprocessing market due to its unique flexibility to handle a wide variety of heavy crudes 'while producing clean transportation fuels. The process is also flexible in terms of changes in yield selectivity and product quality. The unconverted vacuum residue from the process can be utilized for fuel oil production, blended into asphalt, routed to resid catalytic cracking, directly combusted or gasified to produce hydrogen. This paper will discuss additional background information on the H-Oil Process, some of the key advances made to the process and applications for the Latin America market. The paper will also discuss the status of recent commercial plants which are in operation or which are under design or construction and which utilize these new advances. -
Thermal Stability Analysis of Hydroprocessing Unit A
THERMAL STABILITY ANALYSIS OF HYDROPROCESSING UNIT A Thesis by YONGCHUL CHO Submitted to the Office of Graduate and Professional Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Chair of Committee, M. Sam Mannan Committee Members, Mahmoud M. El-Halwagi Maria A. Barrufet Head of Department, M. Nazmul Karim May 2018 Major Subject: Chemical Engineering Copyright 2018 Yongchul Cho ABSTRACT Thermal stability is one of the most critical safety issues in the hydroprocessing units. Runaway reactions in the units can lead to catastrophic consequences as the reactors are being operated at high temperature and pressure, and the reactor effluent is a highly explosive mixture which contains hydrogen and hydrocarbons. For example, a fire and explosion due to a runaway reaction in a hydrocracking unit caused one death and forty-six injuries in 1997, in California. While the temperature runaway is the topic which has been studied extensively, most of the studies worked on simple reactions and little focused on the complex reactions such as hydroprocessing reactions. Also, in the studies on the hydroprocessing reactions, a lumping kinetic model was used which is less accurate and requires experiments for each application. In this research, the thermal stability of a naphtha hydrotreater will be analyzed by using a commercial process simulator ProMax where a novel mechanistic kinetic model, Single Event Kinetics has been integrated. Also, a simplified model will be established by using the data provided by ProMax for further analysis. The continuity and energy equations and parametric sensitivity equations will be solved by Matlab based on the methodology presented by Morbidelli and Varma. -
Visbreaking: a Technology of the Past and the Future
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Scientia Iranica C (2012) 19 (3), 569–573 Sharif University of Technology Scientia Iranica Transactions C: Chemistry and Chemical Engineering www.sciencedirect.com Visbreaking: A technology of the past and the future J.G. Speight ∗ CD&W Inc., 2476 Overland Road, Laramie, WY 82070, USA Received 18 August 2011; revised 1 December 2011; accepted 28 December 2011 KEYWORDS Abstract Because of their relative simplicity of design and straightforward thermal approach, visbreaking Petroleum refining; processes will not be ignored or absent from the refinery of the future. However, new and improved Visbreaking; approaches are important for the production of petroleum products. These will include advances in current Fouling. methods, minimization of process energy losses, and improved conversion efficiency. In addition, the use of additives to encourage the preliminary deposition of coke-forming constituents is also an option. Depending upon the additive, disposal of the process sediment can be achieved by a choice of methods. ' 2012 Sharif University of Technology. Production and hosting by Elsevier B.V. Open access under CC BY-NC-ND license. 1. Introduction variables are (1) feedstock type, (2) temperature, (3) pressure, and residence time, which need to be considered to control the extent of cracking. Balancing product yield and market demand, without the manufacture of large quantities of fractions having low com- 2. The visbreaking process mercial value, has long required processes for the conversion of hydrocarbons of one molecular weight range and/or struc- Visbreaking (viscosity reduction, viscosity breaking), a mild ture into some other molecular weight ranges and/or struc- form of thermal cracking, insofar as thermal reactions are tures.