Synthesis of metal-free heteroatom (N, P, O, and B) doped biochar catalysts for enhanced catalytic co-pyrolysis of walnut shells and palm oil fatty acid distillate to produce high-quality bio-oil

被引：0

作者：

Premchand, Premchand ^{[1
,2
,4
]}

Fino, Debora ^{[2
]}

Demichelis, Francesca ^{[2
]}

Bensaid, Samir ^{[2
]}

Chiaramonti, David ^{[3
]}

O'Connell, George ^{[5
]}

Scott, Jason ^{[5
]}

Antunes, Elsa ^{[1
]}

机构：

[1] James Cook Univ, Coll Sci & Engn, Townsville, Australia

[2] Politecn Torino, Dept Appl Sci & Technol, Corso Duca Abruzzi 24, I-10129 Turin, TO, Italy

[3] Politecn Torino, Dept Energy, Corso Duca Abruzzi 24, I-10129 Turin, TO, Italy

[4] Univ Sch Adv studies IUSS Pavia, Dept Sci Technol & Soc, I-27100 Pavia, PV, Italy

[5] Univ New South Wales, Sch Chem Engn, UNSW, Sydney 2052, Australia

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2024年 / 12卷 / 05期

关键词：

Biomass; Catalytic co-pyrolysis; Heteroatom-doped biochar; Bio-oil upgrading; Aromatic hydrocarbons; BIOMASS;

D O I：

10.1016/j.jece.2024.113630

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In the current study, sugarcane bagasse-derived biochar catalysts were synthesized by doping with metal-free heteroatoms including nitrogen, phosphorus, oxygen, and boron and their efficacy was tested for catalytic copyrolysis of walnut shells (WS) and palm oil fatty acid distillate (PFAD) using Py-GC/MS. The biochar catalysts' properties and their effectiveness on co-pyrolytic bio-oil (overall product distribution, selectivity towards aliphatic and aromatic hydrocarbons, and carbon number ranges) were extensively examined. Among the various catalysts considered, boron-doped biochar (BCB) demonstrated effective performance due to an improved surface area, porosity, and acidity and resulted in a significantly increased hydrocarbon yield, particularly in the gasoline and diesel range, and preference for aromatic over aliphatic hydrocarbons. The optimum bio-oil quality was achieved at a feedstock-to-catalyst ratio of 2:1 and a pyrolysis temperature of 750 degrees C, with a hydrocarbon yield of 90.8 % and aromatic hydrocarbon selectivity of 63.5 %. Overall, the study underscores the role of BCB in fostering deoxygenation, decarboxylation, and aromatic selectivity via thermal and catalytic pathways, highlighting the potential of non-metallic doped biochars for bio-oil upgrading.

引用

页数：14