4.7 Article

Catalytic pyrolysis of spent coffee waste for upgrading sustainable bio-oil in a bubbling fluidized-bed reactor: Experimental and techno-economic analysis

期刊

CHEMICAL ENGINEERING JOURNAL
卷 427, 期 -, 页码 -

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.130956

关键词

Spent coffee waste; Catalytic pyrolysis; Bio-oil production; Process simulation; Economic analysis; Scale up

资金

  1. National Research Foundation of Korea(NRF) - Korea government(MSIT) [2020R1A2B5B01097547]
  2. Technology Development Program to Solve Climate Changes through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT [NRF-2018M1A2A2026257]
  3. Engineering Research Center of Excellence Program through the National Research Foundation (NRF), Ministry of Science and ICT, Republic of Korea [NRF-2021R1A5A6002853]
  4. National Research Foundation of Korea [2020R1A2B5B01097547] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

The study focused on producing bio-oil from spent coffee waste through non-catalytic and catalytic fast pyrolysis, with a particular emphasis on comparative analysis of bio-oil quality and techno-economic analysis of scale-up systems. The results showed that dolomite and hematite had competitive unit production costs compared to conventional crude oil prices. Coupling laboratory-scale experimental results with scale-up modeling and economic analysis is crucial for practical feasibility studies in SCW pyrolysis for bio-oil production.
Spent coffee waste (SCW) is extremely attractive to be exploited and utilized as a material source for energy generation and chemical production. This study concerned bio-oil production via non-catalytic and catalytic fast pyrolysis using SCW in a bubbling fluidized-bed reactor (BFR). In particular, a comparative analysis of the quality of the bio-oil produced was conducted for non-catalytic (using silica sand as the bed material) and catalytic (using dolomite, HZSM-5, hematite, and magnetite as the catalyst) fast pyrolysis. Scale-up modeling confirmed using the experimental data was performed at a feed rate of 100 kg h-1 (1,000-fold capacity), which showed different orders in the quality of energy (hematite > magnetite > dolomite > HZSM-5 > silica, in order of energy from highest to lowest) owing to the realistic integration of the BFR with other components in plants, such as the combustor, compressor, and separator. Further, techno-economic analysis of scale-up system revealed that the unit production costs of bio-oil were 0.0151, 0.0034, 0.0143, 0.0095, and 0.0102 $ MJ-1 for silica, dolomite, HZSM-5, hematite, and magnetite, respectively (dolomite > hematite > magnetite > HZSM-5 > silica, in order of unit cost from lowest to highest). Among them, dolomite and hematite showed competitive unit production costs compared to the price of conventional crude oil (0.0098 $ MJ-1). The importance of coupling laboratory-scale experimental results with scale-up modeling and economic analysis has thus been demonstrated for practical feasibility studies of the SCW pyrolysis for bio-oil production.

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