fulltext.study @t Gmail

Catalytic conversion of glycerol to value added liquid products

Paper ID Volume ID Publish Year Pages File Format Full-Text
42297 45919 2010 15 PDF Available
Title
Catalytic conversion of glycerol to value added liquid products
Abstract

Catalytic conversion of glycerol was performed for production of value-added liquid chemicals. In this work, a systematic study has been conducted to evaluate the effects of operating conditions such as glycerol conversion to liquid chemical products in the presence of acid catalysts. Experiments were performed in a fixed-bed reactor using HZSM-5, HY, silica-alumina and γ-alumina catalysts. The temperature, carrier gas flow rate and weight hourly space velocity (WHSV) were maintained in the range of 350–500 °C, 20–50 mL/min and 5.40–21.60 h−1, respectively. The main liquid chemicals detected in liquid product were acetaldehyde, acrolein, formaldehyde and hydroxyacetone. Under all experimental conditions complete glycerol conversion was obtained over silica-alumina and γ-alumina. A maximum liquid product yield of approximately 83 g/100 g feed was obtained with these two catalysts when the operating conditions were maintained at 380 °C, 26 mL/min and 8.68 h−1. Maximum glycerol conversions of 100 wt% and 78.8 wt% were obtained in the presence of HY and HZSM-5 at temperature, carrier gas flow rate and WHSV of 470 °C, 26 mL/min and 8.68 h−1. HY and HZSM-5 produced maximum liquid product of 80.9 and 59.0 g/100 g feed at temperature of 425 and 470 °C, respectively. Silica-alumina produced the maximum acetaldehyde (∼24.5 g/100 g feed) whereas γ-alumina produced the maximum acrolein (∼25 g/100 g feed). Also, silica-alumina produced highest formaldehyde yield of 9 g/100 g feed whereas HY produced highest acetol yield of 14.7 g/100 g feed. The effect of pore size of these catalysts was studied on optimum glycerol conversion and liquid product yield.

Graphical abstractThe optimum operating conditions to obtain the maximum glycerol conversion over HZSM-5 (78.8 wt%) and HY (100 wt%) were 470 °C, 26 mL/min and WHSV of 8.68 h−1. Optimum conversion increased from 80 to 100 wt% and optimum liquid product increased from 59 to 83.3 g/100 g feed when the pore size of catalyst was increased from 0.54 in case of HZSM-5 to 0.74 nm in case of HY; beyond which the effect pore of size was minimal.Figure optionsDownload full-size imageDownload high-quality image (89 K)Download as PowerPoint slide

Keywords
Glycerol; Acetaldehyde; Acrolein; Formaldehyde; Acetol
First Page Preview
Catalytic conversion of glycerol to value added liquid products
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 372, Issue 2, 15 January 2010, Pages 224–238
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us