Concept Study for Competitive Power Generation from Chemical Looping Combustion of Natural Gas

Abstract

Chemical looping combustion (CLC) offers the possibility for efficient fuel conversion with inherent CO2 capture and is expected to significantly reduce the energy penalty associated with CO2 capture processes. Feasibility of the concept has been shown and studied thoroughly in lab experiments whereas the potential for power generation on a large scale will depend on the process configuration. Two different scenarios for competitive power generation from atmospheric pressure CLC of natural gas have been assessed in this study using process simulation. Process design is shown and discussed based on net electric efficiencies.

Biomass-based negative emission technology options with combined heat and power generation

“…The residual capture penalty in CLC is related to the low-level process steam demand for loop seal fluidization and some additional blowers. The expected process steam demand for loop seal fluidization, based on an assessment of the CLC of natural gas for steam generation by Zerobin et al (2016), is assumed to be 5.3% of the fuel power input. The additional electric demand in CLC was earlier assessed as about 1% of the fuel power input compared to a natural gas-fired boiler (Zerobin et al 2016).…”

“…The expected process steam demand for loop seal fluidization, based on an assessment of the CLC of natural gas for steam generation by Zerobin et al (2016), is assumed to be 5.3% of the fuel power input. The additional electric demand in CLC was earlier assessed as about 1% of the fuel power input compared to a natural gas-fired boiler (Zerobin et al 2016). For the present setting, where a CFB boiler for solid biomass is the benchmark, the additional electric demand for blowers and pumps is assumed to be 0.5% of the fuel power input.…”

Simulation of a 100-MW solar-powered thermo-chemical air separation system combined with an oxy-fuel power plant for bio-energy with carbon capture and storage (BECCS)

“…Marx et al (2013) reported for pilot plant test in a 10 MW th unit steam requirements for the fluidisation of the loop-seal to the fuel reactor and to the air reactor of 178.2 kg h −1 and 169.9 kg h −1 , respectively. It was assumed that through careful design of the loop-seals, the steam requirements in an industrial-scale process can be reduced by 50% (Zerobin et al 2016), which corresponds to a steam-to-oxygen carrier mass ratio of about 0.0257 for both loop-seals. To estimate the steam requirements for the CLAS process of this study, the value was linearly extrapolated to match the oxygen carrier circulation rate.…”

Unsteady three-dimensional theoretical model and numerical simulation of a 120-kW chemical looping combustion pilot plant

“…In the laboratory, cold flow models are widely used to study the hydrodynamics of CLC units with the goal of understanding and improving operating conditions (Markström and Lyngfelt, 2012;Penthor et al, 2016). Thereafter, designing and sizing are performed by using engineering tools and providing global quantities by bal ance investigations and process models (Bolhàr Nordenkampf et al, 2009;Marx et al, 2013;Ohlemüller et al, 2015;Zerobin et al, 2016;Zerobin et al, 2017;Haus et al, 2017). In order to model the CLC process and predict the CLC behavior, a one or one half dimensional model is employed because of its considerably low computational cost and previous successful results (Abad et al, 2010;Abad et al, 2013;García Labiano et al, 2013;Abad et al, 2014;Abad et al, 2018).…”