PNNL reaches major milestone in the demonstration of biocrude conversion into renewable diesel

By -

Type of post: NEWS.

A large-scale demonstration converting biocrude to renewable diesel fuel has passed a significant test, operating for more than 2,000 hours continuously without losing effectiveness. Scientists and engineers led by the U.S. Department of Energy’s Pacific Northwest National Laboratory (PNNL) conducted the research to show that the process is robust enough to handle many kinds of raw material without failing.

Figure 1. Basic flow diagram of the whole process (Illustration by Michael Perkins, PNNL)

The initial step in the process is called hydrothermal liquefaction. Wet wastes from sewage treatment and discarded food can provide the raw materials for this innovative process, which converts and concentrates carbon-containing molecules into a liquid biocrude. Just as crude oil from petroleum sources must be refined to be used in vehicles, this biocrude needs to be refined into biofuel, undergoing a hydrotreating process.

The demo project took place at the Bioproducts, Sciences, and Engineering Laboratory on the Richland campus of Washington State University Tri-Cities. For 83 days, a constant flow of biocrude was fed into the reactor. The hydrotreating process introduces hydrogen into a catalytic process that removes sulfur and nitrogen contaminants found in biocrude, generating a combustible end-product of long-chain alkanes, the fuel used in vehicle engines.

The research showed that essentially any biocrude, regardless of wet-waste sources, could be used in the process and the catalyst remained robust during the entire run. While this is just a first step in demonstrating robustness, it is an important step. For the industry to consider investing in this technology, these kinds of demonstrations that show durability and flexibility of the process are needed.

Knowing that transporting biocrude to a treatment facility could be costly, modelers are looking at areas where rural and urban waste could be gathered from various sources in local hubs. For example, they are assessing the resources available within a 50-mile radius of Detroit. There, the sources of potential biocrude feedstock could include food waste, sewage sludge and cooking oil waste. In areas where food waste could be collected and diverted from landfills, much as recycling is currently collected, a processing plant could be up to 10 times larger than in rural areas and provide significant progress toward cost and emission-reduction targets for biofuels.

The next steps for the research team include gathering more sources of biocrude from various waste streams and analyzing the biofuel output for quality. In a new collaboration. PNNL will partner with a commercial waste management company to evaluate waste from many sources. Ultimately, the project will result in a database, which could help decide how facilities can scale up economically.

Popular Posts

Biofuels from algae

By -
Image
In my opinion, the production of biofuels and biobased chemicals from algae is one of the most fascinating topics in the sector of the biorefineries and it will be one of the niches of opportunity with highest potential in the medium and the long terms. This post pretend to be a very basic approach to the topic Algae-to-Biofuels through three general key points. Algae 1,2,3,4,5 Algae include a wide variety of photosynthetic organisms capable of transforming light, water and specific nutrients into products that can be used with commercial and industrial purposes. We can say that algae are sunlight-driven factories with potential to convert CO 2 into biofuels, high-value biochemical, food and feed. There are four algae cultivation technologies currently in use for commercial algae cultivation and proposed for algal biofuel production: extensive or open ponds, intensive or raceway ponds, closed photobioreactors in many designs and closed fermenter systems. Algal biof...
Read more

Biorefinery models - Lignocellulosic biorefinery

By -
Image
Publication date: 25/04/2016 Last update: 25/04/2016 ABOUT THE SERIES OF POSTS “BIOREFINERY MODELS” This post belongs to a series called “ Biorefinery Models ”. This series is devoted to briefly describe the models or concepts of advanced biorefineries which have emerged in the last few years and that are rising currently. These models are simplified representations which enable us to understand in a simple way the structure and characteristics of a general biorefinery type. Some of these models refer to the type of feedstock while other focus on the technologies involved. A biorefinery may resemble these models or be the result of variations and combinations of them. It should be noted that although these paradigms are very useful and instructive, they show limitations in describing and classifying complex systems with high level of integration. In order to define and describe a specific complex case, the blog recommends use the classification proposed by IEA Bioenerg...
Read more

Hidrotratamiento (HVO) – Conceptos, materias primas y especificaciones

By -
Image
English version Sección: BIOCOMBUSTIBLES AVANZADOS Serie: HVO - Hidrotratamiento (HVO) – Conceptos, materias primas y especificaciones - Hidrotratamiento(HVO) – Ventajas sobre el biodiesel convencional y propiedades - Biorrefinerías de Aceites Vegetales Hidrotatados (HVO) – El auge del diésel renovable - Entradas: HVO                El acrónimo HVO significa en inglés “ Hydrotreated Vegetable Oils ” (“Aceites Vegetales Hidrotratados”) o ” Hydrogenated Vegetable Oils ” (“Aceites Vegetales Hidrogenados”). Clave del proceso: Tratamiento con hidrógeno. En el proceso de producción de HVO, el hidrógeno se usa para eliminar el oxígeno de los triglicéridos produciendo una mezcla de parafinas lineales, CO 2 y agua. Posteriormente, el producto de la primera etapa se isomeriza, siempre en presencia de hidrógeno, para ramificar las cadenas lineales con el propósito de mejorar las propieda...
Read more

Fotobiorreactores

By -
Image
El cultivo de microalgas no es algo novedoso, muchos de los métodos y conceptos que se usan hoy en día fueron desarrollados a finales del siglo XIX y principios de la pasada centuria. En décadas posteriores, se han ido refinando por la intervención de varias disciplinas que han trabajado de manera conjunta: biología, ingeniería de procesos, matemáticas y física. En los últimos 30 años, la industria biotecnológica de las microalgas ha crecido y se ha diversificado de manera significativa. Sin embargo, las aplicaciones comerciales existentes, todavía se hallan limitadas a comercios de bajo volumen y gran valor añadido como el de los suplementos alimenticios o el de los extractos (por ejemplo, el beta-caroteno). De acuerdo con un informe de IEA Bioenergy del 2010, la cantidad de biomasa algal producida comercialmente estaba en el entorno de las 9.000 toneladas. 1,2,3,4 Actualmente, el interés creciente que despiertan el empleo de las microalgas en la obtención de biocombustibles y e...
Read more

Levulinic acid biorefineries

By -
Image
Publication date: 16/11/2015 Last update: 20/02/2016 Description 1,2 Levulinic acid (also known as 4-oxopentanoic acid or γ-ketovaleric acid) is an organic compound with chemical formula C 5 H 8 O 3 . It is a white crystalline solid soluble in water and polar organic solvents. It contains ketone and a carboxylic group whose presence results in interesting reactivity patterns. It is one of the more recognized Biobased Chemical Building Blocks , a starting material for a wide number of compounds (see Applications below). In fact, it was recognized by the US DoE as one of the top biobased platform chemicals of the future and it can successfully address many performance-related issues attributed to petroleum-based chemicals and materials. Process technologies 1,3,4,5 The controlled degradation of C6-sugars by acids is the most widely used approach to prepare levulinic acid from lignocellulosic biomass. Other methods have also been studied, for instance, the hydroly...
Read more