Browsing Institutt for kjemisk prosessteknologi by Title
Now showing items 1179-1198 of 1767
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On-Line PI Controller tuning Using Closed-Loop Setpoint Response
(Journal article; Peer reviewed, 2010)The proposed method is similar to the Ziegler-Nichols (1942) tuning method, but it is faster to use and does not require the system to approach instability with sustained oscillations. The method requires one closed-loop ... -
Once-Through Gas-to-Liquid Process Concept for Offshore Applications
(Master thesis, 2015)The worlds energy demand is increasing, and at the same time the amount of easily accessible oil is reduced. Associated gas for most off-shore applications are flared or injected in the reservoir due to transportation ... -
One-pot catalytic vinyl chloride (VCM) production
(Master thesis, 2019)Målet med denne tesen var å syntetisere metallfrie katalysatorer for ett-steg syntese av vinylkloridmonomer (VCM), samt videre studie av katalysatorene ved bruk av ulike karakteriseringsteknikker som N2-fysisorbsjon, Raman ... -
One-pot conversion of biomass to chemicals
(Master thesis, 2017)One-pot conversion of biomass to diols can be a simple and fast alternative to other methods of biomass conversion. The catalyst for this conversion is required to be bifunctional, catalysing both hydrogenation and retro-aldol ... -
One-pot Conversion of Biomass to Chemicals on Ni-Cu/ZnO Based Catalysts
(Master thesis, 2015)Optimization of the one-pot hydrothermal reaction of cellulose to polyols have been investigated. Ni-Cu-ZnO catalysts supported by carbon nanotubes (CNT) with varying nickel (Ni) and copper (Cu) mole ratio was synthesized ... -
One-Pot Conversion of Cellulose to Ethylene Glycol and Propylene Glycol over Nickel Zinc Oxide Catalysts with CNT Support
(Master thesis, 2013)Ni-Zn oxide catalysts with CNT support were prepared by the pechini method, and evaluated for the conversion of cellulose to polyols. The catalysts were characterized by XRD, SEM/TEM, N2 adsorption, temperature programmed ... -
One-pot Conversion of Cellulose to Ethylene Glycol using CNT Supported Tungsten Catalysts
(Master thesis, 2017)The one-pot catalytic conversion of cellulose to ethylene glycol (EG) is a promising approach for biomass utilization. The catalysts developed for this process have to be bifunctional, catalysing both retro-aldol condensation ... -
One-pot synthesis of highly dispersed mesoporous Cu/ZrO2 catalysts for NH3-SCR
(Peer reviewed; Journal article, 2021)Catalysts consisting of highly dispersed copper on a mesoporous ZrO2 support were synthesised via a one-pot sol-gel synthesis and were tested for the selective catalytic reduction of NOx by NH3. The copper dispersion was ... -
Online PID Tuning for Unstable Processes: Application to Anti-Slug Control
(Master thesis, 2013)Slug flow is an undesired multiphase flow phenomena causing problems in the processing of oil and gas. Anti-slug control is therefore an important research topic. Satisfactory results have been achieved in anti-slug control ... -
Online Process Optimization with Active Constraint Set Changes using Simple Control Structures
(Journal article; Peer reviewed, 2019)The purpose of this paper is to show that online process optimization can be achieved using simple control structures without the need for solving numerical optimization problems online. In particular, we show that changes ... -
Ontology Design for Representation of mathematical Models
(Master thesis, 2015)In this study, ontologies intended for structuring information of physical-chemical-biological processes has been presented. The ontologies was implemented in a tool, called the "Ontology Editor", that facilitate for ... -
Ontology-based Computer-aided modelling Tool
(Master thesis, 2012)A long-lived software project for using the advantages of a computer in modelling of physical-chemical-biological processes has been under development by supervisor Prof Heinz A. Preisig. The software is designed to assist ... -
Ontology-Based Process Modelling-with Examples of Physical Topologies
(Journal article, 2021) -
Operando FTIR study of the NH3-SCR reaction over Cu/Al2O3 and Fe/Al2O3 catalysts
(Master thesis, 2018)The aim of this thesis was to perform an operando study of the NH3-SCR reaction using Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) and Mass Spectrometry (MS). The experiments were performed in a ... -
Operation and feasibility of batch hetero-azeotropic distillation
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:47, Doctoral thesis, 2004)Separation of azeotropic mixtures is of great industrial importance and distillation is the dominating unit operation for such separations. However, the presence of azeotropes and non-idealities in the phase behaviour of ... -
Opportunities of small-scale hydrogen production from MSWI fly ash
(Master thesis, 2022)Denne avhandlingen presenterer en innledende tekno-økonomisk vurdering av mulighetene for hydrogenproduksjon fra MSWI flyveaske. Arbeidet har blitt utført i samarbeid med selskapet NOAH, som driver anlegget for avfallshåndtering ... -
Optimal boundary control of a contact thawing process for foodstuff
(Journal article, 2016)In this work an approach for thawing blocks of foodstuff, in particular fish, is introduced. The functional principle is based on plate freezer technology, which has been used in industry for decades. The aim of this work ... -
Optimal Control of Energy Storage Systems
(Master thesis, 2021) -
Optimal Control of TES System by Using Nonlinear Model Predictive Control
(Master thesis, 2020)WE-utvinningsprosess (industriell spillvarme) gjenbruker varmeenergi som ellers ville gått tapt for å sikre og forbedre ressursbevaring og avfall, samt for å redusere kostnader. Under slike omstendigheter kan et termisk ... -
Optimal control of thermal energy storage under supply and demand uncertainty
(Master thesis, 2019)