In this research, the effect of catalyst type on the CNTs synthesis was investigated. The carbonnanotubes (CNTs) were produced on stainless steel substrates and two of catalyst with differentcharacteristics by using Thermal chemical vapor deposition (TCVD) method. The catalysts have theimportant role for the growth carbon nanotubes (CNTs). Acetylene gas (C2H2) diluted by NH3 wasused as the reac...

Adsorption of the toxic gas molecules carbon monoxide (CO), dioxide (CO2) and ammonia (NH3 ) on edge N-doped sawtooth penta-graphene nanoribbons (N:SSPGNRs) was studied using first-principles methods. Basing our study density functional theory (DFT), we investigated adsorption configurations, energy, charge transfer, electronic properties CO-, CO2 - NH3- adsorbed ontoN:SSPGNRs. We found that CO...

As part of a field campaign in the framework of the NitroEurope project, three different instruments for atmospheric ammonia (NH3) measurements were operated sideby-side on a managed grassland site in Switzerland: a modified Proton Transfer Reaction Mass Spectrometer (PTRMS), a GRadient of AErosol and Gases Online Registrator (GRAEGOR), and an Automated Ammonia Analyzer (AiRRmonia). The modifie...

Context. This paper is the third in a series of NH3 multilevel imaging studies in well-known high-mass star forming regions. Aims. We want to map at sub-arcsecond resolution highly-excited inversion lines of NH3 in the high-mass star forming region W51 Main (distance=5.4 kpc). Methods. Using the Karl Jansky Very Large Array (JVLA), we have mapped the hot and dense molecular gas in W51 Main, wit...

The thermal decomposition of ammonium dinitramide, NH4N(NO2)2 (ADN), in the gas phase has been studied at 373–920 K by pyrolysis/mass spectrometry under low-pressure conditions using a Saalfeld reactor. The reaction of the sublimed mixture of NH3 and HN(NO2)2 (dinitraminic acid, DN) was found to be initiated by the unimolecular decomposition of DN, HN(NO2)2 → HNNO2 ` NO2, followed by the rapid ...

Introduction Nitrous oxide (N2O) is a strong greenhouse gas with global warming potential (GWP) which is much greater, by 310 times, than that of CO2, and chronic exposure of humans to it even with low concentrations has been known to cause miscarriages in an early gestation period, liver disorders, kidney troubles, cancers and troubles of nervous systems [1-3]. N2O having such effects and high...

A Kalman filtering technique is applied to the simultaneous detection of NH3 and CO2 with a diode-laser-based sensor operating at 1.53 micrometers. This technique is developed for improving the sensitivity and precision of trace gas concentration levels based on direct overtone laser absorption spectroscopy in the presence of various sensor noise sources. Filter performance is demonstrated to b...

The high surface area, size, hollow geometry and chemical inertness remarkable properties of CNTs make them attractive for demanding applications in the field of gas sensing. To date studies on possible applications of CNTs have been focused either on individual single-walled carbon nanotubes (SWNTs) as sensitive materials towards O2, NO2 and NH3 [1-4] or on multi-walled carbon nanotubes (MWNTs...

This work explores the multi-element capabilities of inductively coupled plasma-mass spectrometry with collision/reaction cell technology (CCT-ICP-MS) for the simultaneous determination of both spectrally interfered and non-interfered nuclides in wine samples using a single set of experimental conditions. The influence of the cell gas type (i.e. He, He+H2 and He+NH3), cell gas flow rate and sam...

New waste management methods are needed that can protect the environment and allow manure management to switch back to a recycling view of manure handling. We investigated the use of gas-permeable membranes as components of new processes to capture and recover the ammonia in the liquid manures or in the air of poultry houses and other livestock installations. The basic process includes the pass...