Microwave hydrothermal carbonization of rice straw: optimization of process parameters and upgrading of chemical, fuel, structural and thermal properties

Sabzoi Nizamuddin, Sundus Saeed Qureshi, Humair Ahmed Baloch, Muhammad Tahir Hussain Siddiqui, Pooja Takkalkar, Nabisab Mujawar Mubarak, Deepa K. Dumbre, Gregory J. Griffin, Srinivasan Madapusi, Akshat Tanksale

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The process parameters of microwave-induced hydrothermal carbonization (MIHTC) play an important role on the hydrothermal chars (hydrochar) yield. The effect of reaction temperature, reaction time, particle size and biomass to water ratio was optimized for hydrochar yield by modeling using the central composite design (CCD). Further, the rice straw and hydrochar at optimum conditions have been characterized for energy, chemical, structural and thermal properties. The optimum condition for hydrochar synthesis was found to be at a 180 °C reaction temperature, a 20 min reaction time, a 1:15 weight per volume (w/v) biomass to water ratio and a 3 mm particle size, yielding 57.9% of hydrochar. The higher heating value (HHV), carbon content and fixed carbon values increased from 12.3 MJ/kg, 37.19% and 14.37% for rice straw to 17.6 MJ/kg, 48.8% and 35.4% for hydrochar. The porosity, crystallinity and thermal stability of the hydrochar were improved remarkably compared to rice straw after MIHTC. Two characteristic peaks from XRD were observed at 2θ of 15° and 26°, whereas DTG peaks were observed at 50-150 °C and 300-350 °C for both the materials. Based on the results, it can be suggested that the hydrochar could be potentially used for adsorption, carbon sequestration, energy and agriculture applications.

Original languageEnglish
Article number403
Number of pages19
JournalMaterials
Volume12
Issue number3
DOIs
Publication statusPublished - 28 Jan 2019

Keywords

  • Energy properties
  • Hydrochar
  • Microwave-induced hydrothermal carbonization
  • Rice straw

Cite this

Nizamuddin, Sabzoi ; Qureshi, Sundus Saeed ; Baloch, Humair Ahmed ; Siddiqui, Muhammad Tahir Hussain ; Takkalkar, Pooja ; Mubarak, Nabisab Mujawar ; Dumbre, Deepa K. ; Griffin, Gregory J. ; Madapusi, Srinivasan ; Tanksale, Akshat. / Microwave hydrothermal carbonization of rice straw : optimization of process parameters and upgrading of chemical, fuel, structural and thermal properties. In: Materials. 2019 ; Vol. 12, No. 3.
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abstract = "The process parameters of microwave-induced hydrothermal carbonization (MIHTC) play an important role on the hydrothermal chars (hydrochar) yield. The effect of reaction temperature, reaction time, particle size and biomass to water ratio was optimized for hydrochar yield by modeling using the central composite design (CCD). Further, the rice straw and hydrochar at optimum conditions have been characterized for energy, chemical, structural and thermal properties. The optimum condition for hydrochar synthesis was found to be at a 180 °C reaction temperature, a 20 min reaction time, a 1:15 weight per volume (w/v) biomass to water ratio and a 3 mm particle size, yielding 57.9{\%} of hydrochar. The higher heating value (HHV), carbon content and fixed carbon values increased from 12.3 MJ/kg, 37.19{\%} and 14.37{\%} for rice straw to 17.6 MJ/kg, 48.8{\%} and 35.4{\%} for hydrochar. The porosity, crystallinity and thermal stability of the hydrochar were improved remarkably compared to rice straw after MIHTC. Two characteristic peaks from XRD were observed at 2θ of 15° and 26°, whereas DTG peaks were observed at 50-150 °C and 300-350 °C for both the materials. Based on the results, it can be suggested that the hydrochar could be potentially used for adsorption, carbon sequestration, energy and agriculture applications.",
keywords = "Energy properties, Hydrochar, Microwave-induced hydrothermal carbonization, Rice straw",
author = "Sabzoi Nizamuddin and Qureshi, {Sundus Saeed} and Baloch, {Humair Ahmed} and Siddiqui, {Muhammad Tahir Hussain} and Pooja Takkalkar and Mubarak, {Nabisab Mujawar} and Dumbre, {Deepa K.} and Griffin, {Gregory J.} and Srinivasan Madapusi and Akshat Tanksale",
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Nizamuddin, S, Qureshi, SS, Baloch, HA, Siddiqui, MTH, Takkalkar, P, Mubarak, NM, Dumbre, DK, Griffin, GJ, Madapusi, S & Tanksale, A 2019, 'Microwave hydrothermal carbonization of rice straw: optimization of process parameters and upgrading of chemical, fuel, structural and thermal properties' Materials, vol. 12, no. 3, 403. https://doi.org/10.3390/ma12030403

Microwave hydrothermal carbonization of rice straw : optimization of process parameters and upgrading of chemical, fuel, structural and thermal properties. / Nizamuddin, Sabzoi; Qureshi, Sundus Saeed; Baloch, Humair Ahmed; Siddiqui, Muhammad Tahir Hussain; Takkalkar, Pooja; Mubarak, Nabisab Mujawar; Dumbre, Deepa K.; Griffin, Gregory J.; Madapusi, Srinivasan; Tanksale, Akshat.

In: Materials, Vol. 12, No. 3, 403, 28.01.2019.

Research output: Contribution to journalArticleResearchpeer-review

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T2 - optimization of process parameters and upgrading of chemical, fuel, structural and thermal properties

AU - Nizamuddin, Sabzoi

AU - Qureshi, Sundus Saeed

AU - Baloch, Humair Ahmed

AU - Siddiqui, Muhammad Tahir Hussain

AU - Takkalkar, Pooja

AU - Mubarak, Nabisab Mujawar

AU - Dumbre, Deepa K.

AU - Griffin, Gregory J.

AU - Madapusi, Srinivasan

AU - Tanksale, Akshat

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KW - Rice straw

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