scholarly journals Production of formate from CO2 gas under ambient conditions: towards flow-through enzyme reactors

2020 ◽  
Vol 22 (12) ◽  
pp. 3727-3733 ◽  
Author(s):  
Mohamed Baccour ◽  
Alexandra Lamotte ◽  
Kento Sakai ◽  
Eric Dubreucq ◽  
Ahmad Mehdi ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Ambient Conditions ◽  
Co2 Gas ◽  
Enzyme Reactors ◽  
Carbon Dioxide Gas ◽  
Flow Through ◽  
Enzymatic Reactor

A flow-through bi-enzymatic reactor was developed to produce formate from carbon dioxide gas (CO2).

Carbon Dioxide Gas Sensor Using SAW Device Based on ZnO Film

2011 ◽  
Vol 135-136 ◽  
pp. 347-352 ◽  
Author(s):  
Chang Bao Wen ◽  
Yong Feng Ju ◽  
Wan Lin Li ◽  
Wen Zheng Sun ◽  
Xin Xu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Sensor ◽  
Side Lobe ◽  
Center Frequency ◽  
Zno Film ◽  
Co2 Gas ◽  
Response Characteristics ◽  
Carbon Dioxide Gas ◽  
Co2 Gas Sensor ◽  
Carbon Dioxide Co2

Carbon dioxide (CO2) gas sensor using surface acoustic wave (SAW) device based on Zinc oxide (ZnO) was developed and fabricated in this paper. The center frequency of SAW device is 203.528 MHz. The input and two output interdigital transducers (IDT) apodized by Morlet wavelet function can improve the side lobe rejection compared with uniform IDT. The ZnO film sensitive to CO2 gas was fabricated in measurement acoustic track of SAW device. Experiments results confirm that the CO2 gas sensor using SAW device based on ZnO film has good response characteristics to different concentrations CO2 gas. Furthermore, the CO2 gas sensor using SAW device based on ZnO film has good stability and linearity.

scholarly journals EGYPT, DASHUR: AN ANCIENT CO/CO2 GAS GENERATOR DISCOVERED ON THE LOWER LEVEL OF THE BENT PYRAMID OF SNEFERU

2017 ◽  
pp. 104-110
Author(s):  
A. M. Yaroschuk
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Gas Generator ◽  
Co2 Gas ◽  
Lower Tier ◽  
Carbon Dioxide Gas

The article researches the design and the purpose of the lower tier chamber in the Bent Pyramid of Sneferu in Dashure. The review of the earlier archeological research materials has shown that the purpose of the chamber has not been determined. In the process of the current research a technological link between the lower and the upper tiers of the pyramid has been found. It has been proven that the lower tier elements (the chamber itself, the shaft, and the chimney) all together comprised an ancient furnace – a CO/CO2 gas generator. Its purpose was to produce a mixture of carbon monoxide and carbon dioxide gas to fill the space of the upper tier of the pyramid. The goal of the architect or was to make the pyramid chambers deadly for burglars.  Constructive  similarities  between  the  furnace  in  the  lower  tier of the Sneferu Pyramid and the modern CO/CO2 gas generator have been established. A theory about the presence of the secret chambers in the pyramid, including the  chamber  containing  the  Sarcophagus  of  the  Pharaoh  has  been  substantiated. A theory  explaining  the  purpose  of  changing  the  shape  and  the  construction of the Bent Pyramid specifically has been proposed. 

Metallurgical failure analysis of an exploded CO2 gas cylinder

2020 ◽  
Vol 62 (11) ◽  
pp. 1085-1088
Author(s):  
Syed Fida Hassan
Keyword(s):  
Carbon Dioxide ◽  
Building Construction ◽  
Construction Site ◽  
Co2 Gas ◽  
Microstructure Observation ◽  
Carbon Dioxide Gas ◽  
Filling Station ◽  
Gas Cylinder ◽  
Martensitic Microstructure ◽  
External Corrosion

Abstract A gas cylinder, containing carbon dioxide (CO2) in a manifold of sixteen cylinders, exploded in an outdoor building construction site at midday within two hours of its arrival from a filling station. It was to be used for construction welding. The seamless gas cylinder that exploded was made of low alloy steel with a tempered martensitic microstructure. Observation revealed the presence of discreet localized external corrosion which weakened the gas cylinder extremely. A study concluded that the midday outdoor heat had apparently increased the pressure of the carbon dioxide gas within which in turn led to the sudden catastrophic explosion of the weakened corroded gas cylinder.

Removal of Alkali in the Red Mud Using CO2 at Ambient Conditions

2014 ◽  
Vol 875-877 ◽  
pp. 39-43
Author(s):  
Xin Ke Wang ◽  
Yi He Zhang ◽  
Feng Zhu Lv ◽  
Rong Rong Lu
Keyword(s):  
Carbon Dioxide ◽  
Hydrochloric Acid ◽  
Laboratory Study ◽  
Red Mud ◽  
Ambient Conditions ◽  
X Ray Diffraction ◽  
Titration Method ◽  
X Ray ◽  
Carbon Dioxide Gas ◽  
Xrd Patterns

A laboratory study was carried out to investigate the ability of neutralization of red mud(RM) using carbon dioxide gas at ambient conditions. It was to evaluate the removal of alkali in the red mud using CO2.The neutralized red mud was characterized by X-ray diffraction(XRD) , FP-640 flame photometer and auto titration method. XRD patterns of red mud revealed that the intensity of sodalite was decreased by using CO2. The pH of red mud was decreased from 11 to 8 . The specific advantages of these processes are that, through adding with hydrochloric acid(HCl) and N-Methyldiethanolamine(MDEA), the removal of alkali in the red mud (Na2O) was decreased from 12.5% to 2.3% by adding with HCl.What is more , the removal ratio of sodium oxide in the red mud by adding with HCl can be received at 80%.

Enhancement of desorption amount of carbon dioxide gas from monoethanolamine solution using ultrasound and calcium chloride

2020 ◽  
Vol 59 (SK) ◽  
pp. SKKD08
Author(s):  
Yuya Kitamura ◽  
Hirokazu Okawa ◽  
Takahiro Kato ◽  
Katsuyasu Sugawara
Keyword(s):  
Carbon Dioxide ◽  
Calcium Chloride ◽  
Carbon Dioxide Gas

STRATIGRAPHIC, SPATIAL, AND STRUCTURAL STYLE OF NATURAL CARBON DIOXIDE GAS ACCUMULATIONS IN THE GREATER PERMIAN BASIN

2016 ◽  
Author(s):  
Ernie R. Slucher ◽  
◽  
Peter D. Warwick ◽  
Christina A. DeVera ◽  
Celeste D. Lohr ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Permian Basin ◽  
Carbon Dioxide Gas ◽  
Structural Style ◽  
Natural Carbon

scholarly journals The Problem of Carbon Dioxide Emissions from Closed Coal Mine Shafts – The Overview and the Case Study

2016 ◽  
Vol 61 (3) ◽  
pp. 587-600
Author(s):  
Paweł Wrona ◽  
Józef Sułkowski ◽  
Zenon Różański ◽  
Grzegorz Pach
Keyword(s):  
Carbon Dioxide ◽  
Carbon Dioxide Emissions ◽  
Carbon Dioxide Emission ◽  
Mining Area ◽  
Emission Point ◽  
Water Pumping ◽  
Gas Hazard ◽  
Flow Through ◽  
Reporting Procedures

Abstract Greenhouse gas emissions are a common problem noticed in every mining area just after mine closures. However, there could be a significant local gas hazard for people with continuous (but variable) emission of these gases into the atmosphere. In the Upper Silesia area, there are 24 shafts left for water pumping purposes and gases can flow through them hydraulically. One of them – Gliwice II shaft – was selected for inspection. Carbon dioxide emission with no methane was detected here. Changes in emission and concentration of carbon dioxide around the shaft was the aim of research carried out. It was stated that a selected shaft can create two kinds of gas problems. The first relates to CO2 emission into the atmosphere. Possible emission of that gas during one minute was estimated at 5,11 kg CO2/min. The second problem refers to the local hazard at the surface. The emission was detected within a radius of 8m from the emission point at the level 1m above the ground. These kinds of matters should be subject to regular gas monitoring and reporting procedures.

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