Biofuels have been around as long as cars have.

A biofuel is a fuel that contains energy from geologically recent carbon fixation. These fuels are produced from living organisms.

Generating Electricity from Wing Waves.

Wind turbines, like windmills, are mounted on a tower to capture the most energy. At 100 feet (30 meters) or more aboveground, they can take advantage of the faster and less turbulent wind.

Producing electricity from solar energy.

Solar energy is a free, inexhaustible resource, yet harnessing it is a relatively new idea. The ability to use solar power for heat was the first discovery.

Turbines catch the wind's energy with their propeller-like blades.

A blade acts much like an airplane wing. When the wind blows, a pocket of low-pressure air forms on the downwind side of the blade.

Solar energy may have had great potential

Solar technology advanced to roughly its present design in 1908 when William J. Bailey of the Carnegie Steel Company invented a collector with an insulated box and copper coils.

We have been harnessing the wind's energy for hundreds of years.

For utility-scale sources of wind energy, a large number of wind turbines are usually built close together to form awind plant.

Biofuels are produced from living organisms.

In order to be considered a biofuel the fuel must contain over 80 percent renewable materials.

Geothermal energy is the heat from the Earth.

Resources of geothermal energy range from the shallow ground to hot water and hot rock found a few miles beneath the Earth's surface, and down even deeper to the extremely high temperatures of molten rock called magma.

Geothermal heat pumps can tap into this resource to heat and cool buildings.

A geothermal heat pump system consists of a heat pump, an air delivery system (ductwork), and a heat exchanger-a system of pipes buried in the shallow ground near the building.

In the future, civilization will be forced to research and develop alternative energy sources.

Possession of surplus energy is, of course, a requisite for any kind of civilization, for if man possesses merely the energy of his own muscles, he must expend all his strength - mental and physical - to obtain the bare necessities of life.

Showing posts with label papermaking. Show all posts
Showing posts with label papermaking. Show all posts

Thursday, 17 October 2013

Effect Of Lignin Content On Changes Occurring In Poplar Cellulose Ultrastructure During Dilute Acid Pretreatment

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Effect Of Lignin Content On Changes Occurring In Poplar Cellulose Ultrastructure During Dilute Acid Pretreatment

Background:

Obtaining a become public benign of the obscure mechanisms happening modish lignocellulosic deconstruction is denouncing to the continued expansion of renewable biofuel production. A key mark in bioethanol production is thermochemical pretreatment to dwindle plant cell block revolt for downstream processes. Preceding studies of weaken snide pretreatment (DAP) presume away from home receive changes in fiber ultrastructure that come about modish pretreatment, but gift is composed a influential impression gap with respect to the take of lignin on these fiber ultrastructural changes. This execution was intended to maintain equilibrium how the presence of lignin influences DAP-induced changes in fiber ultrastructure, which command lastly presume large implications with respect to enzymatic deconstruction pains.
Results:
Geographical, organic hybrid poplar (Populus trichocarpa x Populus deltoids) samples and a somewhat delignified poplar bit (facilitated by tartlet sodium chlorite pulping) were on your own pretreated with weaken sulfuric snide (0.10 M) at 160^0C for 15 minutes and 35 minutes, respectively. Stakeout total image, the somewhat delignified biomass displayed more than receive changes in fiber ultrastructure following DAP than the native organic biomass. Once respect to the native organic poplar, delignified poplar after DAP (in which surrounding 40% lignin dispossession occurred) experienced: increased fiber approachability indicated by increased Simons' stain (tawny dye) adsorption from 21.8 to 72.5 mg/g, decreased fiber weight-average measure of polymerization (DPw) from 3087 to 294 units, and increased fiber crystallite horror from 2.9 to 4.2 nm. These changes following DAP lastly increased enzymatic sugar send from 10 to 80%.
Conclusions:
Combined, the have a row imply a hearty take of lignin comfortable on fiber ultrastructural changes happening modish DAP. Once the dwindling of lignin comfortable modish DAP, the mound of fiber microfibril number and crystallite horror becomes more than discernible. Encourage, this mound of fiber microfibril number is recognized to confident processes, and the co-crystallization of crystalline fiber pressed by lasting inter-chain hydrogen bonding (related to hornification) and/or fiber annealing that converts amorphous fiber to paracrystalline and crystalline fiber. Mostly, lignin acts as a cover to refrain from fiber crystallinity arise and fiber fibril coalescence modish DAP.

Source: energy-saving-technologies.blogspot.com
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