Chemical Engineering

Experimental investigations of the influence of pressure on critical extinction conditions of laminar nonpremixed flames burning condensed hydrocarbon fuels, jet fuels, and surrogates
Critical conditions of extinction are measured for high molecular weight hydrocarbon fuels, jet fuels and surrogates at pressures up to 0.4MPa. The hydrocarbon fuels tested are n-heptane, cyclohexane, n-octane, iso-octane, and n-decane. Jet fuels tested include JP-8 and Jet-A. The surrogates tested are the Aachen surrogate, consisting of 80% n-decane and 20% 1,3,5-trimethylbenzene by mass, and ...


NOx storage and reduction properties of model manganese-based lean NOx trap catalysts
In order to study the role of manganese in LNT catalysis, model Pd/Mn/Ba/Al, Pd/Mn/Al and Pd/Ba/Al catalysts were prepared and characterized. Both Mn-containing catalysts exhibited higher activity for NO oxidation to NO2 than the Pd/Ba/Al reference catalyst, although NO x -TPD experiments showed that adsorbed NO x species were weakly bound on Pd/Mn/Al. Consequently, the presence of Ba was esse...
Wireless Communication in Oil and Gas Wells
We review the techniques of below-ground wireless communication in the oil and gas industry. A historical and theoretical analysis of pressure wave and electromagnetic communication is presented. Case studies for both technologies and their current applications are evaluated to identify the limitations of each method and opportunities for innovation. Finally, the possibilities of smart well tec...


Compressibility of fouling layers in membrane bioreactors
In membrane bioreactor (MBR) systems, several fouling mechanisms occur; e.g. pore blocking, gel formation, biofilm growth and cake formation. This study focuses on the cake layer which is easily removed e.g. by relaxation and the inner gel layer that is not removed by relaxation. The cake layers are compressible and significantly influence MBR operation, especially for short term filtrations. O...
Application of deep-sea psychrotolerant bacteria in wastewater treatment by aerobic dynamic membrane bioreactors at low temperature
Wastewater treatment by biological processes was greatly hindered at low temperature. To improve the performance, screened deep-sea psychrotolerant strains were inoculated into an aerobic dynamic membrane bioreactor (ADMBR). The effect of bioaugmentation on reactor start-up, wastewater treatment performance, dynamic membrane formation, and membrane fouling under different temperature conditions...


An innovative approach for the preparation of confined ZIF-8 membranes by conversion of ZnO ALD layers
An innovative eco-friendly approach has been developed for the synthesis of ZIF-8-based nanocomposite membranes. The method involves the Atomic Layer Deposition (ALD) of ZnO thin films on the grains of a macroporous ceramic support and their subsequent conversion to ZIF-8 using a 2-methylimidazole/methanol solution under solvothermal conditions. Despite applying extremely low quantity of chemic...
Integrated perspectives of a greenhouse study to upgrade an antimony and arsenic mine soil – Potential of enhanced phytotechnologies
Coupling more than one remediation technology can be an effective option to reduce contamination levels. Phytoremediation, using ryegrass and Indian mustard, was coupled with electrokinetic process (EK) and/or phosphate amendment aiming to remediate a mine soil contaminated with arsenic (As) and antimony (Sb). At the end of 15days, metalloids uptake, biomass, available soil nutrients and enzyma...

Ozonation of phenacetin in associated with a magnetic catalyst CuFe2O4: The reaction and transformation
The application of CuFe2O4 (CFO), a magnetic spinel, in catalytic ozonation for the degradation of phenacetin (PNT) has been investigated. The performance and the mineralization of PNT in CFO catalytic ozonation (CFOO) were compared with the sole ozonation (SOP), respectively. In SOP, the molecular ozone was reacted with PNT fast, but it was less effective for PNT’s mineralization. The presen...
Validation of a two-dimensional modeling of an externally irradiated slurry photoreactor
A two-dimensional model describing the behavior of a batch cylindrical photoreactor has been validated through a series of photocatalytic reactivity runs. The light intensity radiation field produced by 1–6 external UV fluorescent lamps was modeled together with Langmuir–Hinshelwood kinetics and 4-nitrophenol (NP) and Degussa P25 TiO2 were used as the probe molecule and the catalyst, respec...

Compostable properties of antimicrobial bioplastics based on cinnamaldehyde cross-linked gliadins
The disintegration, biodegradation and ecotoxicity of cross-linked wheat gliadin films with antimicrobial properties were assessed under controlled composting conditions. Gliadins were chemically modified with different percentages of cinnamaldehyde (1.5%, 3% and 5%) increasing their cross-linking degree and imparting antimicrobial activity. After the films were subjected to simulated condition...
Chemistry of defluoridation by one-pot synthesized dicarboxylic acids mediated polyacrylamide–zirconium complex
The current report deals with the synthesis of a new and excellent fluoride sorbents using dicarboxylic acids like oxalic acid (Ox) malonic acid (MA) and succinic acid (SA) mediated polyacrylamide–zirconium (PAAm–Zr) and zirconium–oxalic acid (Zr–Ox) complexes by one-pot method. Among the synthesized complexes, Ox–PAAm–Zr and Zr–Ox complexes showed higher (double the times) defluo...

Collision behaviour of a smaller particle into a larger stationary droplet
The present study investigates the collision behaviour of a smaller particle into a larger stationary droplet – a phenomenon related to many process engineering applications. Experimentally, the collision process was studied using high speed video imaging for glass ballotini particles (diameter: 1.13±0.02mm) and a supported stationary water droplet (diameter 3.41±0.01mm) at different partic...
Genetic improvement of the microalga Phaeodactylum tricornutum for Boosting neutral lipid accumulation
To obtain fast growing oil-rich microalgal strains has been urgently demanded for microalgal biofuel. Malic enzyme (ME), which is involved in pyruvate metabolism and carbon fixation, was first characterized in microalgae here. Overexpression of Phaeodactylum tricornutum ME (PtME) significantly enhanced the expression of PtME and its enzymatic activity in transgenic P. tricornutum. The total lip...
Removal of surfactant template from mesoporous titania
We have reported the synthesis of mesoporous titania with crystalline walls using hexadecyltrimethylammonium bromide (CTAB), a typical cationic surfactant, as a template and titanium sulfoxide as a reactant in aqueous solution (Shibata et al., 2005 ). In this study, the removal method of CTAB from the mesopores without calcination or collapsing the ordered porous structure is described. First, ...
The enhancement of biological ocular UV radiation on beaches compared to the radiation on grass
The influence of albedo on ocular UV exposure has seldom been reported. This paper aimed to explore the enhancement effect on measured ocular UV radiation due to a sand surface compared to measured ocular UV radiation due to a grass surface. We measured ambient and ocular UV radiation over the beach and grass surface in Sanya City of China (18.4°N, 109.7°E). The experimental apparatus was com...