Abstract A new design of the catalytic tube system with a crossflow configuration, featured by low catalyst usage and cost, is developed using computational fluid dynamics (CFD). Meanwhile, the kinetics of ethanol steam reforming over a nickel-based catalyst is conducted based on experimental measurements. The effects of six parameters on ethanol conversion and H2 yield are evaluated; they Characteristics of heat transfer and chemical reaction of Jan 13, 2016 · We did a numerical examination of the heat transfer and chemical reaction characteristics in methane-steam reforming, which is widely used in the petrochemical industry. In fact, the prediction of temperature variation along the reformer tube is essential for methanesteam reforming, as it also causes material failures, such as thermal stress concentration.
Jan 01, 2016 · Reformer furnaces are widely used in petrochemical industry to obtain hydrogen from hydrocarbons through an endothermic catalytic reaction. This production takes place in radiant tubes, designed for a nominal life of 100,000 h at temperatures up to 980 °C and internal pressures of 10-40 bar.Their life is primarily limited by creep damage, driven by a combination of high service Experimental and Exergetic Evaluation of Ethanol The application of exergy analysis in the evaluation of the ethanol steam reforming (ESR) process in a catalytic membrane reactor (CMR) was presented. ESR experiments were performed at T=873-923 K and P=4-12 bar in a CMR containing Pd-Ag membranes sandwiched by Pd-Rh/CeO 2 catalyst, aiming to produce fuel cell grade pure hydrogen. Failure Analysis of Incoloy 800HT and HP-Modified Alloy Mar 20, 2019 · H.M. Tawancy et al., Failure analysis of catalytic steam reformer tubes. Anti Corros. Methods Mater 52(6), 337344 (2005) Article Google Scholar 13. C. Maharaj, J.P. Dear, A. Morris, A review of methods to estimate creep damage in low-alloy steel power station steam
Oct 01, 2002 · Abstract. The present article describes the failure of a primary reformer tube in an ammonia plant. The failure took place at the stub end of the reformer tube where a SS 321 flange was joined to a HK 40 catalyst tube by welding. Detailed metallurgical examinations indicated that the failure was due to stress corrosion cracking. Problem, Failure and Safety Analysis of Ammonia Plant:a reformer tube. Reformer tubes from a fertilizer plant made of modified HK 40 steel which failed after 4 years service during startup of plant. At that time only 60 burners (out of 576 burners) were firing in the reformer. The gas in the catalyst tubes was mainly hydrogen and steam at low pressure of 3 kg/cm2 only. Seven tubes had Reformer Tube - an overview ScienceDirect TopicsConventionally, an MSR reactor is a tube-shaped reactor, packed randomly with Ni-based catalytic Raschig rings. A typical reformer technical specification is listed in Table 11.2:the reactor is very long, in order to increase the gas mixture temperature and to support the steam reforming reaction.As stated above, the pressure is 30 bar or more, even if the steam reforming reaction is promoted
Sep 24, 2013 · Steam Reforming - Common Problems 1. Gerard B. Hawkins Managing Director WWW.GBHENTERPRISES.COM 2. The aim of this presentation is to Discuss some of the common problems that occur on steam reformers Analyze problems associated with Catalyst Tubes Reformer Design WWW.GBHENTERPRISES.COMPSM lessons from a major reformer furnace failuremainly of methane) is passed through a two stage Reforming process where, in the Primary Reformer Furnace, the methane gas is partially converted to hydrogen, carbon monoxide and carbon dioxide using steam and a nickel catalyst. The catalyst is loaded inside the furnace tubes of the Primary Reformer.