Analysis of the Process of Mineral Sequestration of CO2 with the Use of Fluidised Bed Combustion (FBC) Fly Ashes

There is a current focus on replacing the generally accepted conventional power generation technologies with more advanced ones that will better protect the natural environment. The need to limit CO2 emissions from power generation plants presents a problem that must be solved in many countries that use coal or lignite as basic fuels. One potential option is mineral sequestration performed using side products of fossil fuel combustion, such as fluidised bed combustion (FBC) fly ashes. Fluidised bed combustion (FBC) lignite fly ashes are characterised by a high storage capacity of 15.7%. Research conducted with the most commonly used method of direct mineral sequestration—CO2 trapping with fluidised bed combustion (FBC) ash in water suspension—has indicated a very high level of carbonation of CO2, reaching 11%. Calcite was the basic product of carbonation. The calcite content increased from 2 to 12% in the suspension subjected to treatment with CO2. Furthermore, CO2 reduced the pH and limited the leaching of impurities, such as Zn, Cu, Pb, Ni, As, Hg, Cd, Cr, Cl, and SO4. The fly ash suspensions subjected to CO2 treatment can be used in industry in the final stage of carbon capture and utilisation (CCU) technology, which will further contribute to the implementation of the circular economy.

Download Full-text

Fuel Ammonia from Fossil Energy: Hydrocarbon Utilization for Sustainable Development

10.2118/208059-ms ◽

2021 ◽

Author(s):

Takashi Akai ◽

Makoto Shimouchi ◽

Keisuke Miyoshi ◽

Hiroshi Okabe

Keyword(s):

Power Generation ◽

Sustainable Development ◽

Carbon Footprint ◽

Value Chain ◽

Carbon Capture ◽

Oil And Gas ◽

Carbon Capture And Storage ◽

Fossil Energy ◽

High Level ◽

Key Aspects

Abstract Synthetic ammonia from fossil energy can technically be used for power generation. Viewed as hydrocarbon utilization, it enables oil and gas industries to move towards the sustainable development of resources while minimizing their carbon footprint. We present an integrated high-level overview of this concept by highlighting the following key aspects: i) the carbon footprint of the process, ii) the necessity for carbon capture and storage (CCS), iii) power generation from fuel ammonia, and iv) market development. First, the carbon footprint was estimated based on the chemical formulas of the process, which revealed the necessity for CCS for the process to provide cleaner energy. Second, having reviewed these four key aspects, we showed that most elemental technologies comprising this new value chain have already been technically proven. Finally, we discuss and conclude with possible ways towards the commercialization of this value chain.

Download Full-text

Gasification as an optimum alternative for the sludge management

Water Practice & Technology ◽

10.2166/wpt.2011.0080 ◽

2011 ◽

Vol 6 (4) ◽

Cited By ~ 2

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.

Download Full-text

A high-storage capacity content-addressable memory and its learning algorithm

IEEE Transactions on Circuits and Systems ◽

10.1109/31.31325 ◽

1989 ◽

Vol 36 (5) ◽

pp. 762-766 ◽

Cited By ~ 23

Author(s):

M. Verleysen ◽

B. Sirletti ◽

A. Vandemeulebroecke ◽

P.G.A. Jespers

Keyword(s):

Storage Capacity ◽

Learning Algorithm ◽

Content Addressable Memory ◽

High Storage Capacity ◽

High Storage

Download Full-text

Process design and analysis of a novel carbon-capture-ready process for flexible-load power generation: Modular pressurized air combustion

Energy Conversion and Management ◽

10.1016/j.enconman.2020.113638 ◽

2021 ◽

Vol 228 ◽

pp. 113638

Author(s):

Piyush Verma ◽

Zhiwei Yang ◽

Scott Hume ◽

Andrew Maxson ◽

Richard L. Axelbaum

Keyword(s):

Power Generation ◽

Process Design ◽

Carbon Capture ◽

Load Power ◽

Flexible Load

Download Full-text

Asymmetric pathways in the electrochemical conversion reaction of NiO as battery electrode with high storage capacity

Scientific Reports ◽

10.1038/srep07133 ◽

2014 ◽

Vol 4 (1) ◽

Cited By ~ 39

Author(s):

Ulrike Boesenberg ◽

Matthew A. Marcus ◽

Alpesh K. Shukla ◽

Tanghong Yi ◽

Eamon McDermott ◽

...

Keyword(s):

Storage Capacity ◽

Conversion Reaction ◽

Electrochemical Conversion ◽

High Storage Capacity ◽

Battery Electrode ◽

High Storage

Download Full-text

A stable zinc-4-carboxypyrazole framework with high uptake and selectivity of light hydrocarbons

Dalton Transactions ◽

10.1039/c4dt03594a ◽

2015 ◽

Vol 44 (6) ◽

pp. 2893-2896 ◽

Cited By ~ 33

Author(s):

Hong-Ru Fu ◽

Fei Wang ◽

Jian Zhang

Keyword(s):

Chemical Stability ◽

Storage Capacity ◽

Metal Organic Framework ◽

High Uptake ◽

Light Hydrocarbons ◽

High Storage Capacity ◽

Metal Organic ◽

High Storage ◽

Organic Framework

A metal–organic framework based on 4-carboxypyrazole ligands has been synthesized, and it shows unusual chemical stability and high storage capacity for C2 light hydrocarbons.

Download Full-text

High storage capacity and small volume change of potassium-intercalation into novel vanadium oxychalcogenide monolayers V2S2O, V2Se2O and V2Te2O: An ab initio DFT investigation

Applied Surface Science ◽

10.1016/j.apsusc.2021.149062 ◽

2021 ◽

Vol 546 ◽

pp. 149062 ◽

Cited By ~ 2

Author(s):

Yang-Xin Yu

Keyword(s):

Ab Initio ◽

Volume Change ◽

Small Volume ◽

Storage Capacity ◽

High Storage Capacity ◽

High Storage ◽

Ab Initio Dft

Download Full-text

Waukesha Engine’s New 2 and 3 MWE High Performance, Ultra-Lean Engines and Enginators™ for the Worldwide 50Hz and 60Hz Power Generation Markets

ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference ◽

10.1115/jrc/ice2007-40095 ◽

2007 ◽

Author(s):

Corey A. Honl ◽

Ryan M. Rudnitzki

Keyword(s):

Power Generation ◽

Control System ◽

High Performance ◽

Fuel Injection ◽

Early Stage ◽

Major Elements ◽

Product Strategy ◽

Product Lines ◽

Stage Performance ◽

High Level

The following paper describes the release of the 220GL engine and APG2000/3000 Enginator™ product lines from Waukesha Engine. The major elements of the release that will be covered include the installation and calibration of the ESM® control system, the development of new capabilities to control fuel injection and its associated features, the integration of Waukesha-introduced components on the 220GL, high-level product strategy and justification, and early stage performance figures from development testing.

Download Full-text