Results 11 to 20 of about 1,950,497 (236)

Effect of composition of coke deposited in delayed coker furnace tubes on on-line spalling

open access: yesFuel Processing Technology, 2018
Abstract Delayed coking is one of the most widely used residue upgradation process in crude oil refining where vacuum residue is thermally cracked and converted into distillates and petroleum coke. During heating of vacuum residue in coker furnace, coke is continuously deposited in furnace tubes which is removed at regular intervals by one of the ...
Harender Bisht   +8 more
openaire   +2 more sources

A Hybrid Strategy Enhanced Sub-Sampled Recursive Second Order Algorithm for Chemical Process Intelligent Identification

open access: yesInternational Journal of Computational Intelligence Systems, 2023
The accurate dynamic model of the chemical process is an important condition for the successful implementation of advanced control in the plant. In this paper, an efficient second order algorithm for long short-term memory (LSTM) network training is ...
Yaxin Wang, Baochang Xu
doaj   +1 more source

Compositional Simulation of a Refinery Coker Furnace - An Industrial Example of Two-Phase Flow with Chemical Reaction [PDF]

open access: yesModeling, Identification and Control, 1986
A computer program (KOKSOVN) has been developed for compositional steady-state simulation of a refinery delayed coker furnace. The main objective of this work has been to establish a tool for studying the effects that influence the deposition of coke on ...
Sigurd Skogestad   +2 more
doaj   +1 more source

Upgrading of coker distillate under variable hydrotreating operating conditions

open access: yesEgyptian Journal of Petroleum, 2011
Studies on hydrotreating coker distillates, produced from a delayed coker unit were done using a commercially available CoMo/γ-Al2O3 catalyst, on which 0.2 wt% P2O5 was added in order to improve its characteristics.
H.A. Elsayed, H.S. Ahmed, M.F. Monufy
doaj   +1 more source

Diclofenac Prolongs Repolarization in Ventricular Muscle with Impaired Repolarization Reserve [PDF]

open access: yes, 2012
Background: The aim of the present work was to characterize the electrophysiological effects of the non-steroidal anti- inflammatory drug diclofenac and to study the possible proarrhythmic potency of the drug in ventricular muscle.
A Farkas   +56 more
core   +5 more sources

RESPONSE OF SELECTED YIELD ATTRIBUTES OF COTTON (GOSSYPIUM HIRSUTUM L) TO VARIED ENVIRONMENTS AND SOWING ROW POSITIONS [PDF]

open access: yesمجلة الأنبار للعلوم الزراعية
Understanding the impact of different microenvironments (sowing direction and sowing dates) and row locations on yield and yield component of Coker 310 cultivar were studied.
K. K. Muhammad, S. M. Maaroof
doaj   +1 more source

Evolutionary rates and gene dispensability associate with replication timing in the Archaeon Sulfolobus islandicus [PDF]

open access: yes, 2010
In bacterial chromosomes, the position of a gene relative to the single origin of replication generally reflects its replication timing, how often it is expressed, and consequently, its rate of evolution.
Cooper, Vaughn S.   +3 more
core   +2 more sources

Hierarchical Frequent Sequence Mining Algorithm for the Analysis of Alarm Cascades in Chemical Processes

open access: yesIEEE Access, 2018
Faults and malfunctions on complex chemical production systems generate alarm cascades that hinder the work of the operators and make fault diagnosis a complex and challenging task.
Gyula Dorgo, Kristof Varga, Janos Abonyi
doaj   +1 more source

Extra-articular tenodesis combined with an anterior cruciate ligament reconstruction in acute anterior cruciate ligament tear in elite female football players [PDF]

open access: yes, 2016
PURPOSE: The growing popularity of elite soccer among female participants has led to increased incidents of anterior cruciate ligament (ACL) ruptures. Many authors underline a positive glide after ACL reconstruction (ACLR), especially in women.
FABBRI, MATTIA   +7 more
core   +1 more source

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