Catalytic liquefaction of human feces over Ni-Tm/TiO2 catalyst and the influence of operating conditions on products. (1st February 2018)

• Record Type: Journal Article
• Authors: Wang, Wenjia; Yang, Lei; Yin, Zhaosen; Kong, Shengyan; Han, Wei; Zhang, Jinglai
• Is Part Of: Energy conversion and management. Volume 157(2018)
• Page Start: 239
• Page End: 245
• Publication Date: 2018-02-01
• Subjects: Human feces -- Hydrothermal liquefaction -- Biocrude -- Catalyst -- Excrement treatment; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2017.11.081
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: Catalytic liquefaction could convert 89.77% of human feces. The highest biocrude yield was 53.16% with Ni-Tm/TiO2 catalyst. Catalyst, temperautre and time significantly influenced the biocrude composition. The distribution of gaseous products at different HTL conditions were analyzed. Abstract: In this study, human feces were hydrothermal liquefied and converted into biocrude over Ni-Tm/TiO2 catalyst. The influence of catalysts, reaction temperature, and holding time on the distribution of products and element content of biocrude was assessed. The biocrude yield increased to 53.16% with a reaction temperature of 330 °C, a holding time of 30 min, and adding Ni-Tm/TiO2 catalyst while the liquefaction conversion peaked at 89.61%. The biocrude had an HHV of 36.64 MJ/kg and was similar to heavy crude oil. The biocrude is rich in fatty acid amides, esters, and oxygen-containing-only heteroatom-ring compounds as well as some nitrogen-containing heteroatom-ring compounds. The main gaseous products were CO2, CH4, and C2 H6 . Hydrothermal liquefaction over Ni-Tm/TiO2 catalyst could be a potential method to handle human excrement treatment and produce biofuel.