scholarly journals Petrophysical Characterization and Reservoir Simulator for Methane Gas Production from Gulf of Mexico Hydrates

2006 ◽  
Author(s):  
Kishore Mohanty ◽  
Bill Cook ◽  
Mustafa Hakimuddin ◽  
Ramanan Pitchumani ◽  
Damiola Ogunlana ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Gas Production ◽  
Methane Gas ◽  
Reservoir Simulator

scholarly journals Evaluation of nutrient content and in-vitro gas production of complete feed based on corn stover (Zea mays) supplemented by mimosa powder and myristic acid

2020 ◽  
Vol 18 (2) ◽  
pp. 191
Author(s):  
Muchamad Muchlas ◽  
Siti Chuzaemi ◽  
Mashudi Mashudi
Keyword(s):  
Carbon Dioxide ◽  
Zea Mays ◽  
Corn Stover ◽  
Myristic Acid ◽  
Block Design ◽  
Gas Production ◽  
Total Carbon ◽  
Methane Gas ◽  
In Vitro Gas Production

<p class="MDPI17abstract"><strong>Objective: </strong>The purpose of this research was to evaluate the effect supplementation of mimosa powder as a source of condensed tannins and a single fatty acid, myristic acid, in a complete feed based on corn stover (<em>Zea mays</em>) using the in-vitro gas production method. This research has been carried out at the Animal Nutrition and Food Laboratory, Faculty of Animal Husbandry, Brawijaya University. The time of the research was conducted in August until December 2019.</p><p class="MDPI17abstract"><strong>Methods: </strong>The experimental design used randomized complete block design by ANOVA consisting four treatments and three replications which were P1= a complete feed based on corn stover (<em>Zea mays</em>) as control Diet (CD) (40% corn stover + 60 % concentrate), P2= (CD) + Mimosa Powder(MP) 1.5 %/kg DM + myristic acid (MA)2% /kg DM, P3= CD + MP 1.5 % /kg DM + MA 3% /kg DM, and P4= CD + MP 1.5 %/kg DM + MA 4 %/kg DM.</p><p class="MDPI17abstract"><strong>Results: </strong>The results showed that the treatments affected total gas production (p&lt;0.01). The highest value for total gas production was found in P1 (86.67 ml/500 mg DM) and the lowest was found in P3 (73.30 ml/500 mg DM). The results showed that gas production decreased concurrently with the increase of MA level. In vitro methane gas and carbon dioxide production was showed different (p&lt;0.05) from the control treatment. The lowest concentration of methane production was in P4 (82863.07 ppm) and the highest concentration was in treatment P1 86530.89 ppm. The highest total carbon dioxide content was P1 (436711.57 ppm) and the lowest concentration was P3 (350287.72 ppm).</p><p class="MDPI17abstract"><strong>Conclusions: </strong>The results of the research concluded that the addition of mimosa powder and 3 different levels of myristic acid in a complete feed based on corn stover can increase the nutritional value of a complete feed and reduce the production of methane gas.</p>

A Comprehensive Review on CO2/N2 Mixture Injection for Methane Gas Recovery in Hydrate Reservoirs

2021 ◽  
Author(s):  
Azeez Gbenga Aregbe ◽  
Ayoola Idris Fadeyi
Keyword(s):  
Carbon Dioxide ◽  
Gas Production ◽  
Gas Mixture ◽  
Methane Gas ◽  
Gas Recovery ◽  
Oceanic Sediments ◽  
Replacement Process ◽  
The World ◽  
Gas Molecules ◽  
Hydrate Reservoirs

Abstract Clathrate hydrates are non-stoichiometric compounds of water and gas molecules coexisting at relatively low temperatures and high pressures. The gas molecules are trapped in cage-like structures of the water molecules by hydrogen bonds. There are several hydrate deposits in permafrost and oceanic sediments with an enormous amount of energy. The energy content of methane in hydrate reservoirs is considered to be up to 50 times that of conventional petroleum resources, with about 2,500 to 20,000 trillion m3 of methane gas. More than 220 hydrate deposits in permafrost and oceanic sediments have been identified to date. The exploration and production of these deposits to recover the trapped methane gas could overcome the world energy challenges and create a sustainable energy future. Furthermore, global warming is a major issue facing the world at large and it is caused by greenhouse gas emissions such as carbon dioxide. As a result, researchers and organizations have proposed various methods of reducing the emission of carbon dioxide gas. One of the proposed methods is the geological storage of carbon dioxide in depleted oil and gas reservoirs, oceanic sediments, deep saline aquifers, and depleted hydrate deposits. Studies have shown that there is the possibility of methane gas production and carbon dioxide storage in hydrate reservoirs using the injection of carbon dioxide and nitrogen gas mixture. However, the conventional hydrocarbon production methods cannot be used for the hydrate reservoirs due to the nature of these reservoirs. In addition, thermal stimulation and depressurization are not effective methods for methane gas production and carbon sequestration in hydrate-bearing sediments. Therefore, the gas replacement method for methane production and carbon dioxide storage in clathrate hydrate is investigated in this paper. The research studies (experiments, modeling/simulation, and field tests) on CO2/N2 gas mixture injection for the optimization of methane gas recovery in hydrate reservoirs are reviewed. It was discovered that the injection of the gas mixture enhanced the recovery process by replacing methane gas in the small and large cages of the hydrate. Also, the presence of N2 molecules significantly increased fluid injectivity and methane recovery rate. In addition, a significant amount of free water was not released and the hydrate phase was stable during the replacement process. It is an effective method for permanent storage of carbon dioxide in the hydrate layer. However, further research studies on the effects of gas composition, particle size, and gas transport on the replacement process and swapping rate are required.

scholarly journals PSIX-8 Evaluation of Siam weed (Chromolaena odorata) leaves as a modifier of rumen fermentation in West African dwarf bucks

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 393-394
Author(s):  
Adebayo O Oni ◽  
Bobby-Joe Ogadu ◽  
Azeez O Yusuf ◽  
A Adebowale ◽  
Oluwakemi Oni ◽  
...  
Keyword(s):  
Dry Matter ◽  
Rumen Fermentation ◽  
Gas Production ◽  
West African ◽  
Phytochemical Analysis ◽  
Chromolaena Odorata ◽  
Crude Fibre ◽  
West African Dwarf ◽  
Methane Gas

Abstract Recently, bioactive component of plant and plant parts have been used as rumen modifier to reduce methane gas production in ruminant livestock so as to reduce their contribution to the implicated greenhouse effect. This study therefore, evaluated the potential of Siam weed (Chromolaena odorata) leaves as a modifier of rumen fermentation in West African dwarf bucks. Fresh C. odorata leaves were harvested, air dried (3 weeks), milled using a 2mm sieve size and bagged for both proximate and phytochemical analysis. Concentrate diets were formulated with C. odorata leaf meal included in the diet at 0, 2, 4 and 6% of the whole diet. Rumen fluids were collected from West African dwarf (WAD) bucks (averaged 25kg) using suction tube and randomly allotted to the 4 experimental diets in a Completely Randomized Design. Incubation of inoculums was done for 96hrs with 12 replicates per treatment in a single run. Data obtained were analyzed using a One-way Analysis of Variance and means compared using Tukey’s Test. Results indicated that C. odorata had 969.0mg/kg dry matter, 175.1mg/kg crude protein, 204.3mg/kg crude fibre, 521.6mg/kg nitrogen free extract, 19.9 mg/kg saponin, 25.7 mg/kg tannin, 10.8mg/kg flavonoid and 12.6 mg/kg alkaloid. The addition of 2 and 4% C. odorata to the diets resulted in increased (P &lt; 0.05) in vitro gas production while C. odorata at 2 % reduced (P &lt; 0.05) the methane gas (%) estimate. In vitro organic and dry matter digestibilities, total digestible substrates and short chain fatty acids were increased (P &lt; 0.05) with C. odorata addition to the diets. This study concluded that the use of C. odorata as an additive at 2 and 4% inclusion increased total gas output; however, 2% inclusion will be beneficial as it reduced the methane output while maintaining higher gas production and digestibility.

scholarly journals Dinitrogen and methane gas production during the anaerobic/anoxic decomposition of animal manure

2014 ◽  
Vol 100 (1) ◽  
pp. 53-64 ◽  
Author(s):  
Lowry A. Harper ◽  
Kim H. Weaver ◽  
Alex De Visscher
Keyword(s):  
Animal Manure ◽  
Gas Production ◽  
Methane Gas

Methane Gas Production from Anaerobic Digestion of Cattle Manure

1984 ◽  
Vol 7 (4) ◽  
pp. 319-341 ◽  
Author(s):  
Syed R. Qasim ◽  
Kelcy Warren ◽  
K. Udomsinrot
Keyword(s):  
Anaerobic Digestion ◽  
Gas Production ◽  
Cattle Manure ◽  
Methane Gas
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