Steam gasification of land, coastal zone and marine biomass by thermal gravimetric analyzer and a free-fall tubular gasifier: Biochars reactivity and hydrogen-rich syngas production

Gasification of coal, biomass, and other carbonaceous materials for high-quality syngas production is considered using concentrated solar energy as the source of high-temperature process heat. The solar reactor consists of two cavities separated by a SiC-coated graphite plate, with the upper one serving as the radiative absorber and the lower one containing the reacting packed bed that shrinks as the reaction progresses. A 5-kW prototype reactor with an 8 cm-depth, 14.3 cm-diameter cylindrical bed was fabricated and tested in the High-Flux Solar Simulator at PSI, subjected to solar flux concentrations up to 2300 suns. Beech charcoal was used as a model feedstock and converted into high-quality syngas (predominantly H2 and CO) with packed-bed temperatures up to 1500 K, an upgrade factor of the calorific value of 1.33, and an energy conversion efficiency of 29%. Pyrolysis was evident through the evolution of higher gaseous hydrocarbons during heating of the packed bed. The engineering design, fabrication, and testing of the solar reactor are described.

Download Full-text

Chemical Looping Catalytic Steam Gasification (CLCSG) of Algae Over La 1-XBa xFeO 3 Perovskites for Syngas Production

SSRN Electronic Journal ◽

10.2139/ssrn.3824333 ◽

2021 ◽

Author(s):

Jingchun Yan ◽

Shouxi Jiang ◽

Tao Song ◽

Laihong Shen

Keyword(s):

Steam Gasification ◽

Chemical Looping ◽

Syngas Production

Download Full-text

Steam gasification of Greek lignite and its chars by co-feeding CO2 toward syngas production with an adjustable H2/CO ratio

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2021.06.131 ◽

2021 ◽

Author(s):

Athanasios Lampropoulos ◽

Vassilios Binas ◽

Michalis Konsolakis ◽

George E. Marnellos

Keyword(s):

Steam Gasification ◽

Syngas Production

Download Full-text

Hydrogen rich product gas from air-steam gasification of Indian biomasses with waste engine oil as binder

10.21203/rs.3.rs-794017/v1 ◽

2021 ◽

Author(s):

Prashant Sharma ◽

Bhupendra Gupta ◽

Mukesh Pandey

Keyword(s):

Equivalence Ratio ◽

Calorific Value ◽

Steam Gasification ◽

Engine Oil ◽

Small Scale ◽

Hydrogen Yield ◽

Syngas Production ◽

Waste Engine Oil ◽

Product Gas ◽

Biomass Ratio

Abstract Present study concerns with the production of H2 rich product gas by thermochemical energy conversion having biomass gasification as a route for the four biomasses i.e., Kasai Saw Dust, Lemon Grass, Wheat Straw and Pigeon Pea Seed Coat. The biomasses are from the family of woody biomass, grasses, agricultural waste and food process industry wastes. Waste engine oil as an additive is used, which also acts as a binder. Air gasification and Air-steam gasification is applied and compared for product gas composition, hydrogen yield and other performance parameters like lower heating value, energy yield. Product gas constituents, hydrogen production is examined with different steam to biomass ratio (S/B ratio) and equivalence ratio. The equivalence ratio varies from 0.20–0.40 and the steam to biomass ratio varies between 0–4. The waster engine oil is mixed with the biomasses with different percentage of 5 and 10 wt%. For enhancement of feedstock quality palletization process is applied. The H2 yield is greatly affected by the equivalence ratio. Results show maximum H2 production and higher calorific value of product gas at an air to fuel of 0.26 for all the biomass pallets. Also, the S/B ratio observed as important aspect for hydrogen enrichment. Hydrogen yield is maximum at 2.4 steam to biomass ratio. This study considers the rarely studied Indian biomasses with waste engine oil as an additive for hydrogen-rich product gas production and will be beneficial for small scale hydrogen-rich syngas production considering the central Indian region originated biomasses. Statement of Novelty (SON): Research work belongs to eco-friendly use of rarely studied Indian biomass pallets. Equivalence air to fuel ratio (E/R ratio), steam to biomass ratio (S/B ratio) and waste engine oil as additive have been considered to upgrade H2 content and Calorific Value (CV) of the product gas. Novelty of work include use of waste engine oil as additive to make biomass pallets.

Download Full-text

Thermal Effect of Ceramic Nanofiller Aluminium Nitride on Polyethylene Properties

Journal of Nanomaterials ◽

10.1155/2012/250364 ◽

2012 ◽

Vol 2012 ◽

pp. 1-7 ◽

Cited By ~ 3

Author(s):

Omer Bin Sohail ◽

P. A. Sreekumar ◽

S. K. De ◽

Masihullah Jabarullah Khan ◽

Abbas Hakeem ◽

...

Keyword(s):

Catalytic Activity ◽

Ethylene Polymerization ◽

Filler Loading ◽

Aluminium Nitride ◽

Thermal Gravimetric ◽

X Ray Diffraction ◽

Sem Images ◽

Nano Composite ◽

X Ray ◽

Thermal Gravimetric Analyzer

Ethylene polymerization was done to form polyethylene nano-composite with nanoaluminum nitride using zirconocene catalysts. Results show that the catalytic activity is maximum at a filler loading of 15 mg nanoaluminum nitride. Differential scanning calorimeter (DSC) and X-ray diffraction (XRD) results show that percentage crystallinity was also marginally higher at this amount of filler. Thermal behavior of polyethylene nanocomposites (0, 15, 30, and 45) mg was studied by DSC and thermal gravimetric analyzer (TGA). Morphology of the component with 15 mg aluminium nitride is more fibrous as compared to 0 mg aluminium nitride and higher filler loading as shown by SEM images. In order to understand combustibility behavior, tests were performed on microcalorimeter. Its results showed decrease in combustibility in polyethylene nanocomposites as the filler loading increases.

Download Full-text