Thermochemical conversion of black liquor organics into fuels

Anja Oasmaa, Raimo Alen, Paterson McKeough, Allan Johansson

Research output: Book/ReportReportProfessional

Abstract

A low viscosity fuel oil has been prepared from black liquor by the following process: I) thermal treatment of black liquor at 300 - 350 °C under pressure (20 MPa) in the presence of excess alkali (NaOH), 2) removal of sodium from the black liquor primary oil by acid wash, and 3) catalytic upgrading of the sodium free black liquor primary oil. The yield of primary oil was about 40 wt% of the initial black liquor organics in the thermal treatment stage. The oil had a sodium content of 7 % (dry matter basis), and only about 1% of the oil was distillable ( <260 °C). By washing the oil with dilute acid the sodium content was reduced to 0.02 %. In this case the distillate yield was 11%. After the catalytic (NiMo/CoMo) two stage (30 min at 280 °C and 60 min at 390 °C) hydrotreatment the oil yield was 88 % and the distillate yield 51%. The total loss organics in the wash and upgrading stages was 20-25%.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages27
ISBN (Print)951-38-4220-7
Publication statusPublished - 1992
MoE publication typeNot Eligible

Publication series

NameVTT Publications
PublisherVTT
No.102
ISSN (Print)1235-0621
ISSN (Electronic)1455-0849

Fingerprint

Oils
Sodium
Fuel Oils
Heat treatment
Acids
Alkalies
Washing
Viscosity

Keywords

  • black liquor
  • organic compounds
  • conversion
  • thermochemical processes
  • fuels
  • liquid fuels
  • production

Cite this

Oasmaa, A., Alen, R., McKeough, P., & Johansson, A. (1992). Thermochemical conversion of black liquor organics into fuels. Espoo: VTT Technical Research Centre of Finland. VTT Publications, No. 102
Oasmaa, Anja ; Alen, Raimo ; McKeough, Paterson ; Johansson, Allan. / Thermochemical conversion of black liquor organics into fuels. Espoo : VTT Technical Research Centre of Finland, 1992. 27 p. (VTT Publications; No. 102).
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Oasmaa, A, Alen, R, McKeough, P & Johansson, A 1992, Thermochemical conversion of black liquor organics into fuels. VTT Publications, no. 102, VTT Technical Research Centre of Finland, Espoo.

Thermochemical conversion of black liquor organics into fuels. / Oasmaa, Anja; Alen, Raimo; McKeough, Paterson; Johansson, Allan.

Espoo : VTT Technical Research Centre of Finland, 1992. 27 p. (VTT Publications; No. 102).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Thermochemical conversion of black liquor organics into fuels

AU - Oasmaa, Anja

AU - Alen, Raimo

AU - McKeough, Paterson

AU - Johansson, Allan

PY - 1992

Y1 - 1992

N2 - A low viscosity fuel oil has been prepared from black liquor by the following process: I) thermal treatment of black liquor at 300 - 350 °C under pressure (20 MPa) in the presence of excess alkali (NaOH), 2) removal of sodium from the black liquor primary oil by acid wash, and 3) catalytic upgrading of the sodium free black liquor primary oil. The yield of primary oil was about 40 wt% of the initial black liquor organics in the thermal treatment stage. The oil had a sodium content of 7 % (dry matter basis), and only about 1% of the oil was distillable ( <260 °C). By washing the oil with dilute acid the sodium content was reduced to 0.02 %. In this case the distillate yield was 11%. After the catalytic (NiMo/CoMo) two stage (30 min at 280 °C and 60 min at 390 °C) hydrotreatment the oil yield was 88 % and the distillate yield 51%. The total loss organics in the wash and upgrading stages was 20-25%.

AB - A low viscosity fuel oil has been prepared from black liquor by the following process: I) thermal treatment of black liquor at 300 - 350 °C under pressure (20 MPa) in the presence of excess alkali (NaOH), 2) removal of sodium from the black liquor primary oil by acid wash, and 3) catalytic upgrading of the sodium free black liquor primary oil. The yield of primary oil was about 40 wt% of the initial black liquor organics in the thermal treatment stage. The oil had a sodium content of 7 % (dry matter basis), and only about 1% of the oil was distillable ( <260 °C). By washing the oil with dilute acid the sodium content was reduced to 0.02 %. In this case the distillate yield was 11%. After the catalytic (NiMo/CoMo) two stage (30 min at 280 °C and 60 min at 390 °C) hydrotreatment the oil yield was 88 % and the distillate yield 51%. The total loss organics in the wash and upgrading stages was 20-25%.

KW - black liquor

KW - organic compounds

KW - conversion

KW - thermochemical processes

KW - fuels

KW - liquid fuels

KW - production

M3 - Report

SN - 951-38-4220-7

T3 - VTT Publications

BT - Thermochemical conversion of black liquor organics into fuels

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Oasmaa A, Alen R, McKeough P, Johansson A. Thermochemical conversion of black liquor organics into fuels. Espoo: VTT Technical Research Centre of Finland, 1992. 27 p. (VTT Publications; No. 102).