Intrinsic gasification rate of oil sands fluid coke with carbon dioxide and steam

2017 ◽  
Vol 95 (6) ◽  
pp. 1045-1053 ◽  
Author(s):  
Frank Vejahati ◽  
Rajender Gupta
Keyword(s):  
Carbon Dioxide ◽  
Oil Sands ◽  
Gasification Rate ◽  
Fluid Coke

scholarly journals STEAM GASIFICATION OF SOME MONGOLIAN COALS

2017 ◽  
pp. 48-51
Author(s):  
Tungalagtamir B ◽  
Enkhtsetseg E ◽  
Chao Lumen ◽  
Narantsetseg M ◽  
Avid B ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Bituminous Coal ◽  
Steam Gasification ◽  
Coal Deposits ◽  
Gasification Rate ◽  
Product Gas ◽  
N2 Atmosphere ◽  
Carbon Dioxide Concentrations ◽  
Stainless Steel Reactor ◽  
Scale Reactor

The gasification tests for the Alagtolgoi and Ailbayan coal deposits were conducted in the temperature up to 850°C using bench scale reactor in order to evaluate product gas composition. Prior to the gasification experiments, the raw coal was pyrolysed in a stainless steel reactor under N2 atmosphere at a temperature of 500°C for 1 h. General behavior of the coal conversion was quite similar for both coals. The gasification tests show that an increase in temperature enhances the formation of hydrogen, carbon dioxide and carbon monoxide. The highest yield of hydrogen and carbon dioxide concentrations of the Ailbayan coal are achieved at temperature of 850°C, which were 2.859 mmol⋅g-1⋅min-1 and 1.054 mmol⋅g-1⋅min-1 respectively. However maximum rate of hydrogen for Alagtolgoi subbituminous coal reached around 800°C. Overall results show that the maximum gasification rate is reached earlier for subbituminous coal than for bituminous coal, but product gas evolution was higher for the investigated bituminous coal.

First Comprehensive Measurements of Emission Rates of Greenhouse Gases, Volatile Organic Compounds and Reduced Sulfur Compounds from a Tailings Pond in the Alberta Oil Sands

2020 ◽  
Author(s):  
Ralf Staebler ◽  
Samar Moussa ◽  
Yuan You ◽  
Hayley Hung ◽  
Maryam Moradi ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Oil Sands ◽  
Regulatory Compliance ◽  
Sulfur Compounds ◽  
Emission Rates ◽  
Reduced Sulfur Compounds ◽  
Volatile Organic ◽  
Reduced Sulfur

<p>Canada’s Oil Sands Region in northern Alberta contains the world’s largest deposits of commercially exploited bitumen. Extraction of synthetic crude oil from these deposits is a water intensive process, requiring large ponds for water recycling and/or final storage of tailings, already covering a total of over 100 km<sup>2</sup> of liquid surface area in the Athabasca Oil sands. The primary extraction tailings ponds primarily contain sand, silt, clay and unrecovered bitumen, while a few secondary extraction ponds also receive solvents and inorganic and organic by-products of the extraction process. Fugitive emissions of pollutants from these ponds to the atmosphere may therefore be a concern, but until recently, data on emission rates for many pollutants, other than a few reported under regulatory compliance monitoring, were sparse. We present here the results from a comprehensive field campaign to quantify the emissions from a secondary extraction pond to the atmosphere of 68 volatile organic compounds (VOCs), 22 polycyclic aromatic compounds (PACs), 8 reduced sulfur compounds as well as methane, carbon dioxide and ammonia. Three micrometeorological flux methods (eddy covariance, vertical gradients and inverse dispersion modeling) were evaluated for methane fluxes to ensure their mutual comparability. Methane and carbon dioxide fluxes were similar to previous results based on flux chamber measurements. Emission rates for 12 PACs, alkanes and aromatic VOCs, several sulfur species, and ammonia were found to be significant. PACs were dominated by methyl naphthalenes and phenanthrenes, while diethylsulfide and  and n-heptane were the dominant reduced sulfur and VOC species, respectively. The role of these previously unavailable emission rates in regional pollutant budgets will be discussed.</p>

scholarly journals Estimation of gasification rate of coal chars in steam-nitrogen and carbon dioxide-nitrogen atmospheres.

1988 ◽  
Vol 67 (12) ◽  
pp. 1061-1069 ◽  
Author(s):  
Takayuki TAKARADA ◽  
Naoyuki IDA ◽  
Akio HIOKI ◽  
Shinji KANBARA ◽  
Minako YAMAMOTO ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gasification Rate

scholarly journals Nickel geochemistry of oil sands fluid petroleum coke deposits, Alberta, Canada

FACETS ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 469-486 ◽  
Author(s):  
Jake A. Nesbitt ◽  
Jared M. Robertson ◽  
Lawrence A. Swerhone ◽  
Matthew B. J. Lindsay
Keyword(s):  
Pore Water ◽  
Petroleum Coke ◽  
Oil Sands ◽  
Minor Component ◽  
Aquatic Organisms ◽  
Pore Waters ◽  
Edge Structure ◽  
X Ray ◽  
Toxicological Effects ◽  
Fluid Coke

Nickel (Ni) leaching from oil sands petroleum coke can have toxicological effects on aquatic organisms. However, geochemical controls on Ni release, transport, and attenuation within coke deposits remains limited. We examined the geochemistry of fluid coke and associated pore waters from two deposits at an oil sands mine near Fort McMurray, Alberta, Canada. Synchrotron-based micro-X-ray fluorescence (μXRF) and micro-X-ray absorption near edge structure (μXANES) spectroscopy show that Ni(II)-porphyrin complexes dominate, but inorganic phases including Ni(II)-sulfide and Ni(II)-oxide comprise a minor component of fluid coke. Sequential chemical extractions suggested that sorption–desorption reactions may influence Ni mobility within fluid coke deposits. Although only a small proportion of total Ni (<4%) is susceptible to leaching under environmentally relevant concentrations, dissolved Ni concentrations ( n = 65) range from 2 to 120 μg·L−1 (median 7.8 μg·L−1) within the two deposits and generally decrease with depth below the water table. Pore water Ni concentrations are negatively correlated with pH, but not with dissolved sulfate, bicarbonate, or chloride. Overall, our findings suggest that pore water pH and sorption–desorption reactions are principal controls on dissolved Ni concentrations within oil sands fluid petroleum coke deposits.

Role of Dissolving Carbon Dioxide in Densification of Oil Sands Tailings

2011 ◽  
Vol 25 (5) ◽  
pp. 2049-2057 ◽  
Author(s):  
Ren (Robin) Zhu ◽  
Qingxia Liu ◽  
Zhenghe Xu ◽  
Jacob H. Masliyah ◽  
Aman Khan
Keyword(s):  
Carbon Dioxide ◽  
Oil Sands ◽  
Oil Sands Tailings

Activated oil sands fluid coke for electrical double-layer capacitors

2014 ◽  
Vol 271 ◽  
pp. 326-333 ◽  
Author(s):  
Jocelyn E. Zuliani ◽  
Donald W. Kirk ◽  
Charles Q. Jia ◽  
Shitang Tong
Keyword(s):  
Double Layer ◽  
Electrical Double Layer ◽  
Oil Sands ◽  
Electrical Double Layer Capacitors ◽  
Fluid Coke ◽  
Double Layer Capacitors
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