scholarly journals Sulfur Gas Production in Ukraine (Review)

2016 ◽  
Vol 10 (4s) ◽  
pp. 613-619 ◽  
Author(s):  
Victor Yavorskiy ◽  
◽  
Andriy Slyuzar ◽  
Jaroslav Kalymon ◽  
◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Gas Production ◽  
The State ◽  
Gas Cleaning ◽  
Cleaning Method ◽  
New Methods ◽  
Gases Purification

The state of sulfur gas production in Ukraine has been examined. The major producers and consumers of sulfur, as well as available technologies for gases purification from hydrogen sulfide have been characterized. The necessity of applying new methods of gas cleaning from hydrogen sulfide to form sulfur of special grades has been grounded. The advantages of quinhydrone cleaning method to form fine sulfur have been shown.

Gasification as an optimum alternative for the sludge management

2011 ◽  
Vol 6 (4) ◽  
Author(s):  
C. Peregrina ◽  
J. M. Audic ◽  
P. Dauthuille
Keyword(s):  
Power Generation ◽  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Combined Heat And Power ◽  
Gas Production ◽  
Waste Reduction ◽  
Fluidised Bed ◽  
Sludge Management ◽  
Gas Cleaning ◽  
Cleaning System

Assimilate sludge to a fuel is not new. Sludge incineration and Combined Heat and Power (CHP) engines powered with sludge-derived anaerobic digestion gas (ADG) are operations widely used. However, they have a room of improvement to reach simultaneously a positive net power generation and a significant level of waste reduction and stabilization. Gasification has been used in other realms for the conversion of any negative-value carbon-based materials, that would otherwise be disposed as waste, to a gaseous product with a usable heating value for power generation . In fact, the produced gas, the so-called synthetic gas (or syngas), could be suitable for combined heat and power motors. Within this framework gasification could be seen as an optimum alternative for the sludge management that would allow the highest waste reduction yield (similar to incineration) with a high power generation. Although gasification remains a promising route for sewage sludge valorisation, campaigns of measurements show that is not a simple operation and there are still several technical issues to resolve before that gasification was considered to be fully applied in the sludge management. Fluidised bed was chosen by certain technology developers because it is an easy and well known process for solid combustion, and very suitable for non-conventional fuels. However, our tests showed a poor reliable process for gasification of sludge giving a low quality gas production with a significant amount of tars to be treated. The cleaning system that was proposed shows a very limited removal performance and difficulties to be operated. Within the sizes of more common WWTP, an alternative solution to the fluidised bed reactor would be the downdraft bed gasifier that was also audited. Most relevant data of this audit suggest that the technology is more adapted to the idea of sludge gasification presented in the beginning of this paper where a maximum waste reduction is achieved with a great electricity generation thanks to the use of a “good” quality syngas in a CHP engine. Audit show also that there is still some work to do in order to push sludge gasification to a more industrial stage. Regardless what solution would be preferred, the resulting gasification system would involve a more complex scenario compared to Anaerobic Digestion and Incineration, characterised by a thermal dryer and gasifier with a complete gas cleaning system. At the end, economics, reliability and mass and energy yields should be carefully analysed in order to set the place that gasification would play in the forthcoming processing of sewage sludge.

scholarly journals Application of Ozone and Oxygen to Reduce Chemical Oxygen Demand and Hydrogen Sulfide from a Recovered Paper Processing Plant

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Patricia A. Terry
Keyword(s):  
Hydrogen Sulfide ◽  
Chemical Oxygen Demand ◽  
Contact Time ◽  
Oxygen Demand ◽  
Gas Production ◽  
Injection System ◽  
Processing Plant ◽  
Short Contact Time ◽  
Production Of Hydrogen ◽  
Fox River

A pilot study was performed at the Fox River Fiber recovered paper processing company in DePere, Wisconsin, to determine the extent to which injection of oxygen and ozone could reduce the high chemical oxygen demand, COD, in the effluent and the effectiveness of the ozone/oxygen stream in suppressing production of hydrogen sulfide gas in downstream sewage lines. Adaptive Ozone Solutions, LLC, supplied the oxygen/ozone generation and injection system. Samples were analyzed both before and after oxygen/ozone injection. Hydrogen sulfide gas was continuously monitored at sewer stations downstream of Fox River Fiber. Results showed that with a very short contact time, effluent COD was reduced by over 15%. A simple kinetic model predicts that a contact time of fewer than 30 minutes could reduce COD by as much as 60%. In addition, downstream hydrogen sulfide gas production in the sewage mains was also better controlled, such that costly Bioxide applications could be reduced.

scholarly journals Study on Hydrogen Sulfide Gas Production Potential Test for Ground Improvement by Recycled Gypsum and Lime

2012 ◽  
Vol 61 (1) ◽  
pp. 31-36
Author(s):  
Kazuto ENDO ◽  
Mikako NAKAGAWA ◽  
Hirofumi SAKANAKURA ◽  
Yuzo INOUE ◽  
Masahiro I ◽  
...  
Keyword(s):  
Hydrogen Sulfide ◽  
Ground Improvement ◽  
Gas Production ◽  
Production Potential ◽  
Recycled Gypsum ◽  
Potential Test

Effects of Distillers Grains and Substrate Steam-Flaked Corn Concentration on In Vitro Dry Matter Disappearance, Gas Production Kinetics, and Hydrogen Sulfide Production1

2010 ◽  
Vol 26 (4) ◽  
pp. 365-374 ◽  
Author(s):  
M.J. Quinn ◽  
M.L. May ◽  
N. DiLorenzo ◽  
D.R. Smith ◽  
M.L. Galyean
Keyword(s):  
Hydrogen Sulfide ◽  
Dry Matter ◽  
Gas Production ◽  
Distillers Grains ◽  
Production Kinetics

Environmentalism and the Globalization of the Oil Industry in Rio de Janeiro, Brazil

2018 ◽  
Vol 45 (5) ◽  
pp. 186-203 ◽  
Author(s):  
Maria Guadalupe Moog Rodrigues
Keyword(s):  
Rio De Janeiro ◽  
Environmental Governance ◽  
Oil And Gas ◽  
Gas Production ◽  
The State ◽  
Civil Society Organizations ◽  
Longitudinal Case Study ◽  
Oil And Gas Production ◽  
Oil Companies ◽  
Environmental Mobilization

The state of Rio de Janeiro has become a hub for oil and gas production and infrastructure since Brazil entered the global oil market in the 2000s. Observers have anticipated increasing tensions between environmental activists and oil companies. These predictions have not been fulfilled, despite increasing evidence of environmental degradation caused by oil production. What could be hindering environmental mobilization in defense of the environment and affected populations and against the unrestrained expansion of oil infrastructure in the state? A longitudinal case study of environmental activism in defense of the Guanabara Bay ecosystem suggests that answers must consider the combined effects of democratization, political and regulatory decentralization, and neoliberal reforms on socioenvironmental activism—specifically, its weakening as civil society organizations confront increasing burdens of participation in policy making, deeply fragmented institutional and regulatory frameworks for environmental governance, and the expansion of opportunities to engage in collaborative arrangements with corporations. O Estado do Rio de Janeiro tornou-se o centro da infraestrutura e produção de gás e petróleo desde que o Brasil ingressou no mercado internacional de petróleo nos anos 2000. Analistas vêm antecipando crescente tensão entre ativistas ambientais e companhias petrolíferas. Contudo, essas previsões não se concretizaram, não obstante evidência da degradação ambiental que a produção de petróleo vem causando. O que poderia estar impedindo a mobilização em defesa do meio ambiente e populações afetadas, e contra a expansão desmedida da infraestrutura petrolífera no estado? Um estudo de caso longitudinal do ativismo ambiental em defesa dos ecossistemas da Baía de Guanabara sugere que as repostas a essa questão devem considerar os efeitos combinados da democratização, descentralização política e regulatória, e reformas neoliberais no ativismo socioambiental—especificamente, seu enfraquecimento à medida que organizações da sociedade civil confrontam crescentes custos de participação nas políticas públicas, fragmentação de arcabouços regulatórios e institucionais de governança ambiental, e a expansão de oportunidades de engajamento em arranjos colaborativos com corporações.

Exhaust Gases Purification of Sintering Furnaces Using Under-Sludge Water as a Gas Cleaning Solution

2020 ◽  
Vol 24 (3) ◽  
pp. 4-9
Author(s):  
K.E. Druzhinin ◽  
N.V. Vasyunina ◽  
N.V. Nemchinova ◽  
T.R. Gilmanshina
Keyword(s):  
Industrial Research ◽  
Bottom Up ◽  
Exhaust Gases ◽  
Gas Cleaning ◽  
Cleaning Solution ◽  
Irrigation Solution ◽  
Total Alkaline ◽  
Gases Purification

It is proposed to introduce an additional stage of "wet" cleaning of waste gases of caking at RUSAL Achinsk. For experimental industrial research, the work used a multi-vortex scrubber, in which the gas is cleaned in a dispersed water-air layer, formed by the flow of gases from the bottom up through the dispersing lattice. As an absorbent irrigation solution, it is proposed to use pre-heated up to 50 degrees Celsius water (PSH), containing an average of 8.98 g/dm3 and 16.74 g/dm3 of caustic and total alkaline, respectively. The efficiency of gas dust-cleaning was assessed depending on the consumption of PSH (0.2–1.2 l/m3 of gas at feed speeds of 0.2 hp and 0.4 hp), as well as the use of two schemes of its supply (flow and recycling).

Systematic Examination of Metallographic Methods for Detection of Primary Steel Texture

2008 ◽  
Vol 589 ◽  
pp. 25-30
Author(s):  
Ibolya Kardos ◽  
Balázs Verő ◽  
Zsolt Csepeli ◽  
Mihály Réger
Keyword(s):  
Continuous Casting ◽  
Structural Investigation ◽  
Personal Information ◽  
Continuous Casting Machine ◽  
Casting Machine ◽  
The State ◽  
New Methods ◽  
Systematic Examination ◽  
Continuously Cast ◽  
Points Of View

In spite of speedy development of technical tools for examination, the importance of macro structural investigation has not decreased; on the contrary, these methods are in the state of their revival. One of evident reasons for it is the fact, that the results of macro structural examinations and the conclusions drawn from them are in the closest relation with the parameters of technology, reflect their changes, and the deviations from the specified values. It is expedient from time to time to check the methods proved earlier suitable for macro structural investigation, possibly to develop and implement new methods. We have to take in account that the methods now widely applied were developed when the technology, composition, type and quantity of pollutants were still basically different from those of the present. We mention as an example that in the fundamental work of George F. Vander Voort published in 1984 the examinations of macrostructure of continuously cast semi products occupied hardly one to two pages, while nowadays they produce about 90% of the annual 1.1 billion tonne steel quantity in continuous casting plants, thus the decisive proportion of continuously cast semi products examination can hardly be questioned. Taking in consideration the above points of view, in the frame of a consortium work we examined the macrostructure of samples taken from bloom slabs cast on vertical continuous casting machine from nine consciously chosen charges, with methods known from the literature or personal information.

scholarly journals RISK ASSESSMENT IN OIL AND GAS PRODUCTION

Neft i gaz ◽  
2020 ◽  
Vol 1 (121) ◽  
pp. 95-107
Author(s):  
P.A. TANZHARYKOV ◽  
◽  
U.ZH. SARABEKOVA ◽  
A.E. TULEGEN ◽  
◽  
...  
Keyword(s):  
Occupational Safety ◽  
Oil And Gas ◽  
Raw Materials ◽  
Health And Safety ◽  
Gas Production ◽  
The State ◽  
Risk Indicators ◽  
Production Operation ◽  
Labor Protection ◽  
Oil And Gas Production

It is necessary to carry out work to analyze the harmful factors of accidents during the production, operation and transportation of raw materials in oil and gas fields and assess their compliance with the requirements of the standards of the Republic of Kazakhstan. The main goal of labor protection is to create safe working conditions for employees, as well as to prevent personnel from illnesses. In this regard, it is necessary to have a system of accounting, analysis and assessment of the state of labor protection, as well as management of labor protection. This article proposes ways to quickly assess the state of health and safety at work by calculating a number of occupational risk indicators based on information available in the modules for assessing occupational safety by industrial risk indicators. The efficiency of using the OSH management systems software proposed by the authors is based on a specific task from four main modules "Employees", "Events", "Equipment", "Ecology" and a number of submodules. In addition, this work uses matrix methods for assessing risks in the "Probability or Consequences of an Event" coordinate system, "Elmeri" system, "Fine Kinney" method, "Risks". Modern expert methods are compared and presented under the title "Five stages of assessment"

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