Simulating geologic co-sequestration of carbon dioxide and hydrogen sulfide in a basalt formation

被引:37
作者
Bacon, Diana H. [1 ]
Ramanathan, Ramya [1 ]
Schaef, H. Todd [1 ]
McGrail, B. Peter [1 ]
机构
[1] Pacific NW Natl Lab, Richland, WA 99352 USA
关键词
Co-sequestration; Hydrogen sulfide; Carbon dioxide; Simulation; STOMP; PURE WATER; H2S; ROCK; DISSOLUTION; INJECTION; MODEL; GAS; MINERALIZATION; SOLUBILITY; TRANSPORT;
D O I
10.1016/j.ijggc.2013.12.012
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Co-sequestered CO2 with H2S impurities could affect geologic storage, causing changes in pH and oxidation state that affect mineral dissolution and precipitation reactions and the mobility of metals present in the reservoir rocks. We have developed a variable component, non-isothermal simulator, STOMP-COMP (water, multiple components, salt and energy), which simulates multiphase flow gas mixtures in deep saline reservoirs, and the resulting reactions with reservoir minerals. We use this simulator to model the co-injection of CO2 and H2S into brecciated basalt flow top. A 1000 metric ton injection of these supercritical fluids, with 99% CO2 and 1% H2S, is sequestered rapidly by solubility and mineral trapping. CO2 is trapped mainly as calcite within a few decades and H2S is trapped as pyrite within several years. (C) 2014 Elsevier Ltd. All rights reserved.
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页码:165 / 176
页数:12
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