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Östermalm, Sweden

Lownertz P.,Chemrec AB
Asian Paper 2010 - New Applied Technology (NAT) Conference Proceedings | Year: 2010

High-temperature, entrained-flow black liquor gasification can be utilized for production for production of lime kiln fuel gas or for syngas used in synthesis of renewable automotive fuels. The atmospheric oxygen-blown version of the process is a solution for black liquor recovery capacity increase at moderate investment cost with simultaneous replacement of oil or natural gas with a renewable lime kiln fuel gas. The pressurized oxygen-blown version of the process replaced or supplements existing recovery boiler capacity and provides high-quality syngas for synthesis of renewable motor fuels. Several studies have shown that such fuels derived from forest biomass over the black liquor gasification route can be produced with very high conversion efficiency, low net emissions of greenhouse gases and potentially with a low product cost compared to alternative routes. This paper describes the technologies, key performance characteristics as well as the current status of development and of full-scale introduction of the technologies. Source

Process for gasification of an alkali containing energy rich aqueous solution (

A reactor for gasification of feedstocks for gasification, adapted to handle feedstocks for gasification comprising organic and inorganic compounds, wherein said compounds during gasification in the presence of oxygen and/or air at a gasification temperature, wherein the melting temperatures of the constituent inorganic compounds is at least 100 C. lower than the gasification temperature, are converted to a hot reducing gas above 950 C. but below 1300 C. and comprising CO, CO

Carlsson P.E.R.,Energy Technology Center in Pitea | Erik F.,Chemrec AB | Rikard G.,Energy Technology Center in Pitea | Rikard G.,Lulea University of Technology
Tappi Journal | Year: 2010

In this work, predictions from a reacting Computational Fluid Dynamics (CFD) model of a gasification reactor are compared to experimentally obtained data from an industrial pressurized black liquor gasification plant. The data consists of gas samples taken from the hot part of the gasification reactor using a water cooled sampling probe. During the considered experimental campaign, the oxygen-to-black liquor equivalence ratio (λ was varied in three increments, which resulted in a change in reactor temperature and gas composition. The presented numerical study consists of CFD and thermodynamic equilibrium calculations in the considered λ-range using boundary conditions obtained from the experimental campaign. Specifically, the influence of methane concentration on the gas composition is evaluated using both CFD and thermodynamic equilibrium. The results show that the main gas components (H 2, CO, CO2) can be predicted within a relative error of 5% using CFD if the modeled release of H2S and CH4 are specified a priori. In addition, the calculations also show that the methane concentration has large influence on the reactor outlet temperature and final carbon conversion. Source

Andersson J.,Lulea University of Technology | Lundgren J.,Lulea University of Technology | Furusjo E.,Lulea University of Technology | Landalv I.,Lulea University of Technology | Landalv I.,Chemrec AB
Fuel | Year: 2015

Abstract One alternative to reduce the motor fuel production cost and improve the operational flexibility of a black liquor gasification (BLG) plant is to add pyrolysis oil to the black liquor feed and co-gasify the blend. The objective of this study was to investigate techno-economically the possibility to increase methanol production at a pulp mill via co-gasification of pyrolysis oil and black liquor. Gasifying a blend consisting of 50% pyrolysis oil and 50% black liquor on a wet mass basis increases the methanol production by more than 250%, compared to gasifying the available black liquor only. Co-gasification would add extra revenues per produced unit of methanol (IRR > 15%) compared to methanol from unblended BLG (IRR 13%) and be an attractive investment opportunity when the price for pyrolysis oil is less than 70 €/MW h. The economic evaluation was based on a first plant estimate with no investment credit for the recovery boiler and a methanol product value volumetric equivalent to conventional ethanol, both these conditions will not applicable when the technology has been fully commercialized. © 2015 Elsevier Ltd. Source

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