Publications
116 results found
Liu Y, Pini R, Mazzotti M, et al., 2011, Supercritical CO <inf>2</inf> adsorption in micro- and mesoporous carbon
Alternative energy sources with zero carbon emissions represent ultimate solutions to mitigate and stabilize atmospheric CO 2 concentrations. However, technologies are still in development, which are based on efficient and economic generation of electricity from non-carbon-based energy sources. Carbon capture combined with CO 2 sequestration (CCS) offer the possibility to reduce CO 2 emissions in the near future, while allowing for a continued use of fossil fuels. In this context, the injection of CO 2 (or treated flue gas, e.g., mostly CO 2 and N 2) into unmineable coal beds and gas shale reservoirs to enhance natural gas (e.g., CH 4) production is a very attractive option for CO 2 sequestration. Here, the methane that is adsorbed on the coal's (or shale's) porous surface is displaced upon CO 2 injection, due to a stronger adsorption of the latter as compared to the former. Additionally, the recovery of the value-added CH 4 is economically attractive as it allows in principle to offset the cost of the CCS operation. CO 2 sequestration in carbon-based geologic formations is not yet a mature technology, in spite of the growing number of pilot and field tests worldwide that have shown its potential and highlighted its difficulties. As a matter of fact, a major obstacle is given by an insufficient understanding of the molecular-scale processes involving CO 2 adsorption in the micro- and mesoporous organic matter at pressures and temperatures representative for reservoir conditions. Current fundamental investigations of gas adsorption in micro- and mesoporous carbon involve the characterization of carbon-based samples by experimental methods, understanding of the electronic structure of functionalized carbon surfaces by density functional theory (DFT), and the thermodynamic property predictions using a Monte Carlo (MC) method within the Grand Canonical ensemble. In the present study, these three aspects are combined; thus, allowing for a more comprehensive characterizat
Pini R, Storti G, Mazzotti M, 2011, A model for enhanced coal bed methane recovery aimed at carbon dioxide storage, ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, Vol: 17, Pages: 889-900, ISSN: 0929-5607
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- Citations: 28
Benson SM, Li B, Krause M, et al., 2011, Sub-core scale experimentation and modeling of CO<sub>2</sub> and brine migration in homogeneous and heterogeneous rocks, 242nd National Meeting of the American-Chemical-Society (ACS), Publisher: AMER CHEMICAL SOC, ISSN: 0065-7727
Krevor SCM, Pini R, Li B, et al., 2011, Capillary heterogeneity trapping of CO₂ in a sandstone rock at reservoir conditions, Geophysical Research Letters, Vol: 38
Liu Y, Pini R, Mazzotti M, et al., 2011, Supercritical CO2 adsorption in micro-and mesoporous carbon, Pages: 950-951
Casas N, Schell J, Joss L, et al., 2011, Characterization of novel adsorbent materials for a CO2 capture pressure swing adsorption process, Pages: 821-822
Pini R, Casas N, Schell J, et al., 2011, Surface excess variables: Adsorption isotherms and column dynamics, Pages: 614-615
Pini R, Marx D, Burlini L, et al., 2011, Coal characterization for ECBM recovery: gas sorption under dry and humid conditions, and its effect on displacement dynamics, 10TH INTERNATIONAL CONFERENCE ON GREENHOUSE GAS CONTROL TECHNOLOGIES, Vol: 4, Pages: 2157-2161, ISSN: 1876-6102
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- Citations: 4
Pini R, Ottiger S, Storti G, et al., 2010, Prediction of competitive adsorption on coal by a lattice DFT model, ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, Vol: 16, Pages: 37-46, ISSN: 0929-5607
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- Citations: 12
Tai H, Upton CE, White LJ, et al., 2010, Studies on the interactions of CO<sub>2</sub> with biodegradable poly(DL-lactic acid) and poly(lactic acid-<i>co</i>-glycolic acid) copolymers using high pressure ATR-IR and high pressure rheology, POLYMER, Vol: 51, Pages: 1425-1431, ISSN: 0032-3861
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- Citations: 40
Pini R, Ottiger S, Burlini L, et al., 2010, Sorption of carbon dioxide, methane and nitrogen in dry coals at high pressure and moderate temperature, INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, Vol: 4, Pages: 90-101, ISSN: 1750-5836
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- Citations: 111
Mazzotti M, Pini R, Storti G, et al., 2010, Carbon dioxide (CO2) sequestration in unmineable coal seams and use for enhanced coalbed methane recovery (ECBM), Developments and Innovation in Carbon Dioxide (CO2) Capture and Storage Technology, Editors: Maroto-Valer, Publisher: Woodhead Pub Limited, Pages: 127-165, ISBN: 9781845697976
Pini R, Ottiger S, Burlini L, et al., 2009, Role of adsorption and swelling on the dynamics of gas injection in coal, JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, Vol: 114, ISSN: 2169-9313
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- Citations: 164
Johnson C, Ottiger S, Pini R, et al., 2009, Near-Stoichiometric O<sub>2</sub> Binding on Metal Centers In Co(salen) Nanoparticles, AICHE JOURNAL, Vol: 55, Pages: 1040-1045, ISSN: 0001-1541
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- Citations: 9
Mazzotti M, Pini R, Storti G, 2009, Enhanced coalbed methane recovery, JOURNAL OF SUPERCRITICAL FLUIDS, Vol: 47, Pages: 619-627, ISSN: 0896-8446
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- Citations: 189
Pini R, Ottiger S, Burlini L, et al., 2009, CO<sub>2</sub> storage through ECBM recovery: an experimental and modeling study, GREENHOUSE GAS CONTROL TECHNOLOGIES 9, Vol: 1, Pages: 1711-1717, ISSN: 1876-6102
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- Citations: 20
Pini R, Ottiger S, Storti G, et al., 2009, Pure and competitive adsorption of CO<sub>2</sub>, CH<sub>4</sub> and N<sub>2</sub> on coal for ECBM, GREENHOUSE GAS CONTROL TECHNOLOGIES 9, Vol: 1, Pages: 1705-1710, ISSN: 1876-6102
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- Citations: 43
Ottiger S, Pini R, Storti G, et al., 2008, Competitive adsorption equilibria of CO<sub>2</sub> and CH<sub>4</sub> on a dry coal, ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, Vol: 14, Pages: 539-556, ISSN: 0929-5607
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- Citations: 187
Ottiger S, Pini R, Storti G, et al., 2008, Measuring and modeling the competitive adsorption of CO<sub>2</sub>, CH<sub>4</sub>, and N<sub>2</sub> on a dry coal, LANGMUIR, Vol: 24, Pages: 9531-9540, ISSN: 0743-7463
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- Citations: 123
Pini R, Storti G, Mazzotti M, et al., 2008, Sorption and swelling of poly(DL-lactic acid) and poly(lactic-<i>co</i>-glycolic acid) in supercritical CO<sub>2</sub>:: An experimental and modeling study, JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, Vol: 46, Pages: 483-496, ISSN: 0887-6266
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- Citations: 58
Pini R, Ottiger S, Rajendran A, et al., 2008, \Near-critical adsorption of CO<sub>2</sub> on 13X zeolite and N<sub>2</sub>O on silica gel:: lack of evidence of critical phenomena, ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, Vol: 14, Pages: 133-141, ISSN: 0929-5607
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- Citations: 14
Pini R, Ottiger S, Burlini L, et al., 2007, Fundamental mechanisms involved in enhanced coal bed methane recovery for CO<inf>2</inf> storage, Chemie-Ingenieur-Technik, Vol: 79, ISSN: 0009-286X
As an initial step toward better understanding of enhanced coal bed methane recovery (ECBM), a study focused on three issues relating to ECBM. They were the experimental characterization of pure and multi-component competitive adsorption of carbon dioxide and methane on coal; the study of the volumetric changes of the coal matrix caused by sorption of these gases; and the measurement of the coal dynamic behavior under carbon dioxide injection. The adsorption measurements were made with a Rubotherm company magnetic suspension balance. The swelling measurements were made in a high pressure view cell. In the dynamic experiments, the specially designed setup allowed breakthrough experiments on a sample confined under a hydrostatic external pressure. The results of the dynamic experiments were simulated with a mathematical model the aim of which was to evaluate the corresponding permeability. In ECBM, methane is recovered from a coal seam by carbon dioxide injection. Because carbon dioxide is more adsorptive than methane, the carbon dioxide stays in the coal seam and displaces the adsorbed methane. ECBM is thus attractive for greenhouse gas mitigation because the enhanced recovery of the methane makes the carbon dioxide storage of interest. The coal in the coal bed thus has an associated change in volume that affects its porosity and permeability. The desorption of methane causes bed shrinkage, improving the permeability, and the sorption of carbon dioxide causes the coal bed to swell, resulting in a net reduced permeability of the coal, slowing down the gas transport.
Pini R, Storti G, Mazzotti M, et al., 2007, Sorption and swelling of poly(D,L-lactic acid) and poly(lactic-co-glycolic acid) in supercritical CO<sub>2</sub>, MACROMOLECULAR SYMPOSIA, Vol: 259, Pages: 197-202, ISSN: 1022-1360
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- Citations: 12
Ottiger S, Pini R, Storti G, et al., 2006, Experimental and modeling study of the adsorption of CO<inf>2</inf> on coal aimed at ECBM recovery
As a first step towards a better understanding of enhanced coalbed methane, pure and multicomponent competitive adsorption of CO2 and CH4 on coal was characterized and the volumetric changes of the coal matrix caused by the sorption of these gases were measured. For the adsorption measurements, a Magnetic Suspension Balance was used. The sorption of CO2 and CH4 on the coal by a suitable model was studied, which accounts for both adsorption and sorption phenomena, including swelling. A model proposed by Milewska-Duda and Duda for coal in the frame of the Flory-Huggins theory of polymer solutions was tested. The coal is described as a cross-linked chain polymer with pores approximated by holes, where adsorption is taking place in the larger pores and sorption in the smaller ones. This is an abstract of a paper presented at the 2006 AIChE National Meeting (San Francisco, CA 11/12-17/2006).
Ottiger S, Pini R, Storti G, et al., 2006, Adsorption of pure carbon dioxide and methane on dry coal from the Sulcis Coal Province (SW Sardinia, Italy), ENVIRONMENTAL PROGRESS, Vol: 25, Pages: 355-364, ISSN: 0278-4491
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- Citations: 94
Pini R, Ottiger S, Rajendran A, et al., 2006, Reliable measurement of near-critical adsorption by gravimetric method, ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY, Vol: 12, Pages: 393-403, ISSN: 0929-5607
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- Citations: 44
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