Catalytic pyrolysis of straw biomasses (wheat, flax, oat and barley straw) and the comparison of their product yields

Abstract

Biomass can be converted through a biochemical and also thermochemical process. Pyrolysis is considered one of the thermochemical processes that can be used to breakdown biomass into a liquid product called bio-oil. Pyrolysis of Canadian straw biomasses was studied using a thermogravimetric analyzer (TGA) and a bench-scale horizontal fixed bed reactor, to understand the devolatilization process and, to obtain information about their product yields. In this work, the results of experimental studies on the pyrolysis of several Canadian biomasses are described. The pyrolysis of straw biomass was performed in a fixed-bed reactor at temperatures of 500 o C, to study the influence of the feedstock on product distribution. The pyrolysis products were analyzed, and the effect of the catalyst on the product yield is also discussed. The yield of bio-oil and bio-char of the straw pyrolysis using zeolite catalysts was increased up to 46.44% and 38.77%, respectively; while the bio-gas yield was decreased to as low as 13.65%. The use of catalyst 2 (Zeolite YH2.2) had the most significant effect in increasing the yield of bio-oil about 2% and bio-char yield up to 8%. The use of catalyst number 2 also showed the most significant effect during pyrolysis of flax straw by increasing the bio-oil yield up to 46.44%. In the pyrolysis of oat straw, the use of catalyst consistently decreased the bio-gas yield; however, the bio-oil yield increased the most (43.32%) with the use of catalyst 1 (Zeolite YS2.2). The use of catalyst 1 also increased the bio-oil yield during the pyrolysis of barley straw (43.03%).

Microwave‐assisted catalytic pyrolysis of theEupatorium adenophorumfor obtaining valuable products

“…The Aqsha et al reported that using zeolite catalysts could increase bio-oil yield and decrease the bio-gas yield. 39 The previous works, along with our study in this work, have demonstrated that the catalyst could influence the yield of pyrolysis production.…”

Bayah Natural Zeolites to Upgrade the Quality of Bio Crude Oil from Empty Fruit Bunch Pyrolysis

“…The main products of pyrolysis are char, bio-oil, and gas. Bio-crude oil resulting from pyrolysis is composed of a mixture of organic vapors such as acids, alcohols, aldehydes, ethers, ketones, phenols, and hydrocarbons [2,3]. Slow pyrolysis occurs at temperatures around 400 to 500 °C with a relatively long residence time by utilizing high volatile matter from the material.…”

Pyrolysis of wheat and barley straw

“…Several studies on wheat and barley straw pyrolysis were made in the past. They focused mainly on the mass yields (Di Blasi et al 1999;Wang et al 2011;Burhenne et al 2013;Crombie et al 2013;Ronsse et al 2013;Wang et al 2013;Yang et al 2014;Tinwala et al 2015;Aqsha et al 2017;Bis-was et al 2017;Farooq et al 2018;He et al 2018;Jazini et al 2018), the proximate analysis (Ghaly et al 1993;Wang et al 2011;Kloss et al 2012;Crombie et al 2013;Ronsse et al 2013;Wang et al 2013;Yang et al 2014;Tinwala et al 2015;He et al 2018;Jazini et al 2018) and the ultimate analysis (Ghaly et al 1993;Di Blasi et al 1999;Chun et al 2004;Kloss et al 2012;Crombie et al 2013;Ronsse et al 2013;Wang et al 2013;Yang et al 2014;Aqsha et al 2017;He et al 2018;Jazini et al 2018). Some of the authors also studied the higher and lower heating values of the products of pyrolysis (Ghaly et al 1993;Di Blasi et al 1999;Wang et al 2011;Ronsse et al 2013;Yang et al 2014;…”