Catalytic conversion of gaseous tars using land, coastal and marine biomass-derived char catalysts in a bench-scale downstream combined fixed bed system

Jie Li; Zhengyi Liu; Yuanyu Tian; Yanan Zhu; Song Qin; Yingyun Qiao

doi:10.1016/j.biortech.2020.122735

Catalytic conversion of gaseous tars using land, coastal and marine biomass-derived char catalysts in a bench-scale downstream combined fixed bed system

Bioresour Technol. 2020 May:304:122735. doi: 10.1016/j.biortech.2020.122735. Epub 2020 Jan 7.

Authors

Jie Li¹, Zhengyi Liu², Yuanyu Tian¹, Yanan Zhu³, Song Qin², Yingyun Qiao⁴

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, China, University of Petroleum (East China), Qingdao, Shandong 266580, China; Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; Shandong Engineering and Technology Research Center of High Carbon Energy Low Carbonization, Qingdao, Shandong 266590, China.
² Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264000, China.
³ State Key Laboratory of Heavy Oil Processing, China, University of Petroleum (East China), Qingdao, Shandong 266580, China.
⁴ State Key Laboratory of Heavy Oil Processing, China, University of Petroleum (East China), Qingdao, Shandong 266580, China; Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China; Shandong Engineering and Technology Research Center of High Carbon Energy Low Carbonization, Qingdao, Shandong 266590, China. Electronic address: qiao_yingyun@126.com.

PMID: 32086037
DOI: 10.1016/j.biortech.2020.122735

Abstract

The catalytic activity of biochar for tar removal was evaluated in a bench-scale combined fixed bed reactor by comparison of gaseous tar catalytic cracking behaviors over land (Corn stalks, Cs), coastal (Reed, Re) and marine (Sargassum horneri, Sh) char catalyst. The experiments demonstrated that the tar yield after addition of the biochar was reduced significantly; the tar conversion efficiency reached to 94.6% for catalytic at 850 °C with 50 mm char bed length using Re char. And the yield and composition of gas also changed markedly. The percentage of H₂ and CO in the product gas were obviously increased. Sh has a higher H₂ content (49.3% of the total gas content), whereas, CO dominated in the gas products for Cs (45.4%) and Re (48.1%). The results from GC-MS analysis illustrated that the increase in temperature promoted the tar cracking and also promotes the polymerization of some tar components.

Keywords: Biochar; Biomass; Catalyst; Char property; Gasification; Tar removal.

MeSH terms

Biomass
Catalysis
Gases
Refuse Disposal*
Tars*

Substances

Gases
Tars