Technoeconomic assessment of highpressure peat liquefaction

Paterson McKeough, Virve Tulenheimo

Research output: Book/ReportReport

Abstract

The study is part of a research program, the aim of which is to identify the most promising process concept for the conversion of peat info transport fuels by high-pressure liquefaction. The study consists of techno-economic assessments of a base-ease concept and of four sensitivity-ease consepts. The products are heavy primary oils which require further upgrading into transport fuels. The designs of the processes were based on data generated in bench-scale experiments. The feedstock capacity of the base-case concept was 1 990 t/d of milled peat (50wt% moisture), and the main results of the economic evaluation of this concept were (costs as of mid-1985): - total capital requirement 86 x 106 USD (8 % interest rate), - production costs of primary product 6.4 USD/GJ (for peat price of 1.7 USD/GJ) - overall thermal efficiency 62 % (HHV basis). On the basis of the results of the sensitivity studies it was concluded that thermal drying of milled peat, prior to liquefaction, is advantageous; that the concentration of peat in the feed slurry should be limited to about 30 wt% solids; that operating pressures lower than 20 MPa should be sought; and that the economics of the process are not sensitive to the chosen method separating solids from the product stream. A preliminary estimate of the costs of upgrading the primary product info gasoline was also made. Gasoline production costs in the range 10 - 12 USD/GJ were obtained for the base case. This is a promising result, particularly when the Finnish refinery price (exclusive of taxes) is used as a reference.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages64
ISBN (Print)951-38-2949-9
Publication statusPublished - 1987
MoE publication typeD4 Published development or research report or study

Publication series

SeriesValtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports
Number492
ISSN0358-5077

Fingerprint

peat
gasoline
production costs
heat
economics
interest (finance)
taxes
economic analysis
research programs
feedstocks
drying
liquefaction
oils
methodology

Keywords

  • peat
  • conversion
  • liquid fuels
  • liquefaction
  • economic analysis

Cite this

McKeough, P., & Tulenheimo, V. (1987). Technoeconomic assessment of highpressure peat liquefaction. Espoo: VTT Technical Research Centre of Finland. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, No. 492
McKeough, Paterson ; Tulenheimo, Virve. / Technoeconomic assessment of highpressure peat liquefaction. Espoo : VTT Technical Research Centre of Finland, 1987. 64 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 492).
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McKeough, P & Tulenheimo, V 1987, Technoeconomic assessment of highpressure peat liquefaction. Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports, no. 492, VTT Technical Research Centre of Finland, Espoo.

Technoeconomic assessment of highpressure peat liquefaction. / McKeough, Paterson; Tulenheimo, Virve.

Espoo : VTT Technical Research Centre of Finland, 1987. 64 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 492).

Research output: Book/ReportReport

TY - BOOK

T1 - Technoeconomic assessment of highpressure peat liquefaction

AU - McKeough, Paterson

AU - Tulenheimo, Virve

PY - 1987

Y1 - 1987

N2 - The study is part of a research program, the aim of which is to identify the most promising process concept for the conversion of peat info transport fuels by high-pressure liquefaction. The study consists of techno-economic assessments of a base-ease concept and of four sensitivity-ease consepts. The products are heavy primary oils which require further upgrading into transport fuels. The designs of the processes were based on data generated in bench-scale experiments. The feedstock capacity of the base-case concept was 1 990 t/d of milled peat (50wt% moisture), and the main results of the economic evaluation of this concept were (costs as of mid-1985): - total capital requirement 86 x 106 USD (8 % interest rate), - production costs of primary product 6.4 USD/GJ (for peat price of 1.7 USD/GJ) - overall thermal efficiency 62 % (HHV basis). On the basis of the results of the sensitivity studies it was concluded that thermal drying of milled peat, prior to liquefaction, is advantageous; that the concentration of peat in the feed slurry should be limited to about 30 wt% solids; that operating pressures lower than 20 MPa should be sought; and that the economics of the process are not sensitive to the chosen method separating solids from the product stream. A preliminary estimate of the costs of upgrading the primary product info gasoline was also made. Gasoline production costs in the range 10 - 12 USD/GJ were obtained for the base case. This is a promising result, particularly when the Finnish refinery price (exclusive of taxes) is used as a reference.

AB - The study is part of a research program, the aim of which is to identify the most promising process concept for the conversion of peat info transport fuels by high-pressure liquefaction. The study consists of techno-economic assessments of a base-ease concept and of four sensitivity-ease consepts. The products are heavy primary oils which require further upgrading into transport fuels. The designs of the processes were based on data generated in bench-scale experiments. The feedstock capacity of the base-case concept was 1 990 t/d of milled peat (50wt% moisture), and the main results of the economic evaluation of this concept were (costs as of mid-1985): - total capital requirement 86 x 106 USD (8 % interest rate), - production costs of primary product 6.4 USD/GJ (for peat price of 1.7 USD/GJ) - overall thermal efficiency 62 % (HHV basis). On the basis of the results of the sensitivity studies it was concluded that thermal drying of milled peat, prior to liquefaction, is advantageous; that the concentration of peat in the feed slurry should be limited to about 30 wt% solids; that operating pressures lower than 20 MPa should be sought; and that the economics of the process are not sensitive to the chosen method separating solids from the product stream. A preliminary estimate of the costs of upgrading the primary product info gasoline was also made. Gasoline production costs in the range 10 - 12 USD/GJ were obtained for the base case. This is a promising result, particularly when the Finnish refinery price (exclusive of taxes) is used as a reference.

KW - peat

KW - conversion

KW - liquid fuels

KW - liquefaction

KW - economic analysis

M3 - Report

SN - 951-38-2949-9

T3 - Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports

BT - Technoeconomic assessment of highpressure peat liquefaction

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

McKeough P, Tulenheimo V. Technoeconomic assessment of highpressure peat liquefaction. Espoo: VTT Technical Research Centre of Finland, 1987. 64 p. (Valtion teknillinen tutkimuskeskus. Tutkimuksia - Research Reports; No. 492).