Improved biohydrogen production using Ni/ZrCeO loaded on foam reactor through steam gasification of sewage sludge.

The pervasive generation of sewage sludge (SES) and deficiencies in its disposal methods have resulted in several significant environmental and human health challenges. This study explored the catalytic effect of nickel (Ni)-based CeO, ZrO, Zr.Ce.

In-situ desulfurization using porous Ca-based materials for the oxy-CFB process: A computational study.

Within circulating fluidized bed (CFB) processes, gas and solid behaviors are mutually affected by operating conditions. Therefore, understanding the behaviors of gas and solid materials inside CFB processes is required for designing and operating those processes. In addition, in order to minimize the environmental impact, modeling to reduce pollutants such as SO emitted from those processes is essential, and simulation reproduction is necessary for optimization, but little is known.

Microalgae gasification over Ni loaded perovskites for enhanced biohydrogen generation.

Steam gasification of microalgae upon perovskite oxide-supported nickel (Ni) catalysts was carried out for H-rich gas production. Ni-perovskite oxide catalysts with partial substitution of B in perovskite structures (Ni/CaZrO, Ni/Ca(ZrTi)O, and Ni/Ca(ZrTi)O) were synthesized and compared with those of the Ni/AlO catalyst. The perovskite oxide supports improved Ni dispersion by reducing the particle size and strengthening the Ni-support interaction.

Valorization of biomass through gasification for green hydrogen generation: A comprehensive review.

Green and sustainable hydrogen from biomass gasification processes is one of the promising ways to alternate fossil fuels-based hydrogen production. First off, an overview of green hydrogen generation from biomass gasification processes is presented and the corresponding possible gasification reactions and the effect of respective experimental criteria are explained in detail. In addition, a comprehensive explanation of the catalytic effect on tar reduction and hydrogen generation via catalytic gasification is presented regarding the functional mechanisms of various types of catalysts.

Production of biochar from crop residues and its application for biofuel production processes - An overview.

A sustainable carbon-neutral society is imperative for future generations, and biochars and biofuels are inevitable choice to achieve this goal. Crop residues (CR) such as sugarcane bagasse, corn stover, and rice husk are promising sustainable resources as a feedstock for biochars and biofuels. Extensive research has been conducted on CR-based biochar production not only in environmental remediation areas but also in application for biofuel production.

Recent advances of hybrid solar - Biomass thermo-chemical conversion systems.

Solar biomass hybridization is a promising energy technique for efficient utilization while mitigating the disadvantages associated with both biomass and solar energy source. In conventional concentrating solar power (CSP) systems, the contribution of solar energy is relatively low, merely supplementing the system with low/medium temperature air/steam. This paper aimed to emphasize the improvement of solar heat share, particularly in the topping cycle of the hybrid system.

Hydrogen-rich gas production via steam gasification of food waste over basic oxides (MgO/CaO/SrO) promoted-Ni/AlO catalysts.

Food waste, a renewable resource, was converted to H-rich gas via a catalytic steam gasification process. The effects of basic oxides (MgO, CaO, and SrO) with 10 wt% Ni/AlO on the gasification properties of food waste were investigated using a U-shaped gasifier. All catalysts prepared by the precipitation method were analyzed by X-ray diffraction, H-temperature-programmed reduction, NH-temperature-programmed desorption, scanning electron microscopy, and energy-dispersive X-ray spectroscopy.

Recent advances of thermochemical conversion processes for biorefinery.

Lignocellulosic biomass is one of the most promising renewable resources and can replace fossil fuels via various biorefinery processes. Through this study, we addressed and analyzed recent advances in the thermochemical conversion of various lignocellulosic biomasses. We summarized the operation conditions and results related to each thermochemical conversion processes such as pyrolysis (torrefaction), hydrothermal treatment, gasification and combustion.

Waste furniture gasification using rice husk based char catalysts for enhanced hydrogen generation.

Present study provides biohydrogen production methods from waste furniture via catalytic steam gasification with bio-char catalysts (raw char, KOH-activated char and steam-activated char). Total gas yield for the prepared chars was in the order of KOH-activated char > steam-activated char > raw char, whereas, H selectivity was in the sequence of raw char > steam-activated char > KOH-activated char. Though KOH-activated char showed the highest gas yield, highest H selectivity was obtained at the gasification experiment with raw char due to the large amount of Ca and K and its reasonable surface area (146.

Catalytic steam gasification of food waste using Ni-loaded rice husk derived biochar for hydrogen production.

The disposal of food waste (FW) is a major cause of environmental contamination. This study reports an environmentally friendly FW disposal method in the form of catalytic steam gasification using various types of Ni-loaded chars (untreated char, steam-treated char, and ZnCl-treated char). The results were also compared with the gasification results from the Ni catalysts supported on commercial α-alumina (Ni/α-AlO).

Effect of eggshell- and homo-type Ni/AlO catalysts on the pyrolysis of food waste under CO atmosphere.

This study highlights the potential of pyrolysis of food waste (FW) with Ni-based catalysts under CO atmosphere as an environmentally benign disposal technique. FW was pyrolyzed with homo-type Ni/AlO (Ni-HO) or eggshell-type Ni/AlO (Ni-EG) catalysts under flowing CO (50 mL/min) at temperatures from 500 to 700 °C for 1 h. A higher gas yield (42.

Biohydrogen production from catalytic conversion of food waste via steam and air gasification using eggshell- and homo-type Ni/AlO catalysts.

Steam and air gasification with 5 wt% Ni/AlO eggshell (Ni-EG) and homo (Ni-H) catalysts were performed for the first time to produce biohydrogen from food waste. The steam gasification produced comparably higher gas yield than air gasification. In non-catalytic experiments, steam gasification generated a higher volume percent of H, whereas more CO, CO, CH, and C-C were produced in air gasification.

Catalytic conversion of cellulose over mesoporous Y zeolite.

Mesoporous Y zeolite (Meso-Y) was applied, for the first time, to the catalytic pyrolysis of cellulose which is a major constituent of lignocellulosic biomass, to produce high-quality bio-oil. A representative mesoporous catalyst Al-MCM-41 was also used to compare its catalytic activity with that of Meso-Y. Pyrolysis-gas chromatography/mass spectrometry was used for the experiments.

Catalytic pyrolysis of waste mandarin over nanoporous materials.

Catalytic pyrolysis of waste mandarin was performed using nanoporous catalysts. AI-MCM-41 and Meso-MFI, which had different acid characteristics, were used. In addition, the characteristics of Pt/Meso-MFI were compared with those of Meso-MFI.

Catalytic pyrolysis of waste rice husk over mesoporous materials.

Catalytic fast pyrolysis of waste rice husk was carried out using pyrolysis-gas chromatography/mass spectrometry [Py-GC/MS]. Meso-MFI zeolite [Meso-MFI] was used as the catalyst. In addition, a 0.

Catalytic pyrolysis of oilsand bitumen over nanoporous catalysts.

The catalytic cracking of oilsand bitumen was performed over nanoporous materials at atmospheric conditions. The yield of gas increased with application of nanoporous catalysts, with the catalytic conversion to gas highest for Meso-MFI. The cracking activity seemed to correlate with pore size rather than weak acidity or surface area.

Rapid estimation of triacylglycerol content of Chlorella sp. by thermogravimetric analysis.

A simple and reliable method based on thermogravimetric analysis has been developed for determining triacylglycerol content in Chlorella sp. KR-1. There are two decomposing steps during pyrolysis of the microalgal cells and the second step of weight loss may be attributed to degradation and volatilization of triacylglycerols.

Co-pyrolysis characteristics of sawdust and coal blend in TGA and a fixed bed reactor.

Co-pyrolysis characteristics of sawdust and coal blend were determined in TGA and a fixed bed reactor. The yield and conversion of co-pyrolysis of sawdust and coal blend based on volatile matters are higher than those of the sum of sawdust and coal individually. Form TGA experiments, weight loss rate of sawdust and coal blend increases above 400 degrees C and additional weight loss was observed at 700 degrees C.

Gasification of biodiesel by-product with air or oxygen to make syngas.

In the present study, gasification of biodiesel by-product, crude glycerin, was performed in an entrained flow gasifier. Gasification was conducted in a temperature range of 950-1500 degrees C and excess air ratio of 0.17-0.