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Gases, Volume 6, Issue 2

2026 June - 13 articles

Cover Story: Greenhouse CO2 enrichment is widely used to enhance crop productivity, but combustion-based systems may raise concerns regarding air quality and occupational safety. This study evaluates a propane-based CO2 enrichment system under greenhouse conditions using high-resolution air quality monitoring. Concentrations of CO2, CO, NO, NO2, SO2, O3, PM1, PM2.5, and PM10 were continuously assessed to ensure safe operation while maintaining effective CO2 fertilization. The results demonstrate that controlled propane combustion can provide an efficient source of CO2 for crop growth while preserving air quality, supporting sustainable and safe greenhouse production. View this paper
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Articles (13)

  • Article
  • Open Access
643 Views
15 Pages

Introducing CdZnTe Detectors into Measuring 222Rn Concentrations in Water

  • Ioannis Kaissas,
  • Konstantinos Karafasoulis,
  • Aris Kyriakis and
  • Panagiotis Papaprokopiou

3 June 2026

Radon (222Rn) is a noble, radioactive gas and tends to be accumulated in poorly ventilated enclosed spaces. Mainly due to its radioactive daughters and the α-particles emitted, 222Rn poses a risk of cancer and therefore its concentration in air...

(This article belongs to the Topic Ecosystems and Climate Change: Understanding Impacts to Shape the Future)
  • Article
  • Open Access
774 Views
16 Pages

A Correction for the Cylinder Wall Adsorption in Forensic Ethanol Gas Standards

  • Adriaan M. H. van der Veen,
  • Gerard Nieuwenkamp,
  • Nilenska Martina and
  • Jianrong Li

2 June 2026

Forensic ethanol gas standards are used for, among other things, the calibration and metrological verification of evidential breath analysers as described in OIML-R126 Evidential breath analysers. A correction for the amount fraction of ethanol in fo...

(This article belongs to the Section Gas Control)
  • Article
  • Open Access
753 Views
20 Pages

1 June 2026

In megacities, where conventional mitigation strategies exhibit variable and environment-dependent performance, urban air pollution continues to be a significant public health concern. To methodically assess the operational reliability of urban smog...

  • Article
  • Open Access
760 Views
16 Pages

1 June 2026

This study presents experimental adsorption–desorption data of CH4 and CO2 on shale samples from the Cesar-Ranchería Basin, Colombia, a region with limited characterization of gas–rock interactions under reservoir-relevant conditio...

  • Article
  • Open Access
1 Citations
923 Views
19 Pages

14 May 2026

Maritime transport accounts for around 3% of global anthropogenic greenhouse gas (GHG) emissions, a share expected to grow without effective technological and regulatory intervention. Recent policy developments, including the IMO Revised GHG Strategy...

  • Article
  • Open Access
644 Views
12 Pages

13 May 2026

Metal-organic frameworks (MOFs), particularly ELM-11, are promising sorbents for CO2 capture due to their gate-opening phenomenon and excellent reusability. Since actual exhaust gases contain impurities such as NO2, in this study, the effect of NO2 o...

  • Article
  • Open Access
1,204 Views
20 Pages

Synergistic Effect of Nickel and Carbon Defects on Reverse Boudouard Reaction Toward Sustainable Chemical Looping

  • Ahmed M. S. Soliman,
  • Yahia H. Ahmad,
  • Roman Tschentscher,
  • Duncan Akporiaye and
  • Ma’moun Al-Rawashdeh

12 May 2026

The integration of catalytic methane decomposition (CMD) with CO2 gasification (Reverse Boudouard Reaction) offers a promising chemical looping route for carbon-negative hydrogen and syngas production. This work systematically investigates the gasifi...

(This article belongs to the Special Issue 5th Anniversary of Gases—Feature Papers on Gas to Fuels)
  • Article
  • Open Access
1,008 Views
12 Pages

1 May 2026

Electronic nose platforms based on metal-oxide (MOX) sensors offer potential for low-power gas classification under dynamic operating conditions. This study evaluates a BME688-based digital nose configured with a temperature-modulated heater profile...

(This article belongs to the Section Gas Sensors)
  • Article
  • Open Access
745 Views
28 Pages

28 April 2026

During natural gas production and transportation, multi-stage pressure regulation is often required to meet downstream pressure demands, resulting in substantial waste of residual pressure energy at high-pressure wellheads. This study focuses on high...

  • Article
  • Open Access
1,258 Views
20 Pages

Balancing CO2 Enrichment and Air Quality: Performance and Safety of a Propane-Based Greenhouse System

  • Haridian del Pilar León,
  • Carlos Morillas,
  • Sara Martinez,
  • Guillermo Armero and
  • Sergio Alvarez

8 April 2026

Carbon dioxide (CO2) enrichment using fuel combustion is widely applied in greenhouse production. However, its implications for air quality and occupational safety under real operating conditions remain insufficiently characterized. This study evalua...

  • Review
  • Open Access
1 Citations
2,592 Views
37 Pages

2 April 2026

As the global imperative for climate neutrality intensifies, hydrogen (H2) from fossil fuels remains central to decarbonizing hard-to-abate sectors. Conventional production via steam methane reforming (SMR), however, is carbon-intensive and, even wit...

  • Article
  • Open Access
1 Citations
1,154 Views
19 Pages

1 April 2026

Methane emissions from end-use installations in residential natural gas systems remain poorly quantified, despite their importance to both safety and climate policies worldwide. While distribution networks and appliances have received research attent...

(This article belongs to the Section Gas Emissions)
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Gases - ISSN 2673-5628