scholarly journals Small-Scaled Production of Blue Hydrogen with Reduced Carbon Footprint

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5194
Author(s):  
Yuriy Zagashvili ◽  
Aleksey Kuzmin ◽  
George Buslaev ◽  
Valentin Morenov
Keyword(s):  
Hydrogen Production ◽  
Natural Gas ◽  
Synthesis Gas ◽  
Soot Formation ◽  
Material Balance ◽  
Rocket Engines ◽  
Gas Generator ◽  
Two Stage ◽  
Carbon Dioxide Separation ◽  
Material Balance Calculation

This article reviews a method of hydrogen production based on partial non-catalytic oxidation of natural gas in an original synthesis gas generator. The working principles of the unit are similar to those of liquid-propellant rocket engines. This paper presents a description of the operation and technical characteristics of the synthesis gas generator. Its application in the creation of small-scaled plants with a capacity of up to 5–7 thousand m3/h of hydrogen is justified. Hydrogen production in the developed installation requires a two-stage method and includes a technological unit for producing a hydrogen-containing gas. Typical balance compositions of hydrogen-containing gas at the synthesis gas generator’s outlet are given. To increase the hydrogen concentration, it is proposed to carry out a two-stage steam catalytic conversion of carbon monoxide contained in the hydrogen-containing gas at the synthesis gas generator’s outlet using a single Cu–Zn–cement-containing composition. Based on thermodynamic calculations, quasi-optimal modes of natural gas partial oxidation with oxygen are formulated and the results of material balance calculation for the installation are presented. In order to produce “blue” hydrogen, the scheme of carbon dioxide separation and liquefaction is developed. The conclusion section of the paper contains the test results of a pilot demonstration unit and the recommendations for improving the technology and preventing soot formation.

scholarly journals Evaluation and re-understanding of the global natural gas hydrate resources

2021 ◽  
Vol 18 (2) ◽  
pp. 323-338
Author(s):  
Xiong-Qi Pang ◽  
Zhuo-Heng Chen ◽  
Cheng-Zao Jia ◽  
En-Ze Wang ◽  
He-Sheng Shi ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Hydrate ◽  
Oil And Gas ◽  
Material Balance ◽  
Energy Resource ◽  
Resource Assessment ◽  
Future Trend ◽  
Natural Gas Hydrate ◽  
The Future ◽  
Recoverable Resources

AbstractNatural gas hydrate (NGH) has been widely considered as an alternative to conventional oil and gas resources in the future energy resource supply since Trofimuk’s first resource assessment in 1973. At least 29 global estimates have been published from various studies so far, among which 24 estimates are greater than the total conventional gas resources. If drawn in chronological order, the 29 historical resource estimates show a clear downward trend, reflecting the changes in our perception with respect to its resource potential with increasing our knowledge on the NGH with time. A time series of the 29 estimates was used to establish a statistical model for predict the future trend. The model produces an expected resource value of 41.46 × 1012 m3 at the year of 2050. The statistical trend projected future gas hydrate resource is only about 10% of total natural gas resource in conventional reservoir, consistent with estimates of global technically recoverable resources (TRR) in gas hydrate from Monte Carlo technique based on volumetric and material balance approaches. Considering the technical challenges and high cost in commercial production and the lack of competitive advantages compared with rapid growing unconventional and renewable resources, only those on the very top of the gas hydrate resource pyramid will be added to future energy supply. It is unlikely that the NGH will be the major energy source in the future.

Two stage biodiesel and hydrogen production from molasses by oleaginous fungi and Clostridium acetobutylicum ATCC 824

2014 ◽  
Vol 39 (7) ◽  
pp. 3185-3197 ◽  
Author(s):  
Magdy Mohamed Khalil Bagy ◽  
Mohamed Hemida Abd-Alla ◽  
Fatthy Mohamed Morsy ◽  
Elhagag Ahmed Hassan
Keyword(s):  
Hydrogen Production ◽  
Clostridium Acetobutylicum ◽  
Two Stage ◽  
Oleaginous Fungi ◽  
Clostridium Acetobutylicum Atcc 824

Opportunities and Challenges in Converting Existing Natural Gas Infrastructure for Hydrogen Operation

2021 ◽  
Author(s):  
Peter Adam
Keyword(s):  
Hydrogen Production ◽  
Natural Gas ◽  
Energy Transition ◽  
Building Blocks ◽  
Hydrogen Economy ◽  
Storage Network ◽  
The World ◽  
Drive Trains ◽  
Regulatory Bodies ◽  
And Storage

Abstract Hydrogen holds enormous potential in helping the world achieve its decarbonization goals and is set to play a key role in the Energy Transition. However, two central building blocks are needed to make the hydrogen economy a reality: 1) a sufficient source of emissions-free (i.e., blue or green) hydrogen production and 2) a needs-based transportation and storage network that can reliably and cost-effectively supply hydrogen to end-users. Given the high costs associated with developing new transportation infrastructure, many governments, pipeline operators, and regulatory bodies have begun exploring if it is both possible and economical to convert existing natural gas (i.e., methane) infrastructure for hydrogen operation. This paper outlines opportunities and technical challenges associated with such an endeavor – with a particular focus on adaptation requirements for rotating equipment/compressor drive trains and metallurgical and integrity considerations for pipelines.

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