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The gas combustion retort process is classified as an internal combustion technology. For the oil shale pyrolysis it uses a vertical vessel retort. [2] Crushed raw oil shale is fed into the top of the retort, and it moves downward by gravity. When moving downward, oil shale is heated by the rising recycled gases, which cause decomposition of ...
The Paraho Indirect retort configuration is similar to the Paraho Direct except that a part of the gas from the compressor is heated to between 600 °C (1,112 °F) to 800 °C (1,472 °F) in a separate furnace and injected into the retort instead of air. [5] No combustion occurs in the Paraho Indirect retort itself. [1]
In a chemistry laboratory, a retort is a device used for distillation or dry distillation of substances. It consists of a spherical vessel with a long downward-pointing neck. The liquid to be distilled is placed in the vessel and heated.
An American-style 15×15 crossword grid layout. A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one ...
Perhaps the most famous is the November 5, 1996, puzzle by Jeremiah Farrell, published on the day of the U.S. presidential election, which has been featured in the movie Wordplay and the book The Crossword Obsession by Coral Amende, as well as discussed by Peter Jennings on ABC News, featured on CNN, and elsewhere.
Charles P. Clever (1830–1874), American politician; Edith Clever (born 1940), German actress; Todd Clever (born 1983), American rugby union player; Willy Clever (1905–1969), German actor and screenwriter
Retort stand. In chemistry, a retort stand, also called a clamp stand, [1] a ring stand, [2] or a support stand, [3] is a piece of scientific equipment intended to support other pieces of equipment and glassware — for instance, burettes, test tubes and flasks. [4] The typical ring stand consists of a heavy base and a vertical rod, both ...
This has a finite limit as t goes to infinity, namely π /2. Similarly, the integral from 1/3 to 1 allows a Riemann sum as well, coincidentally again producing π /6. Replacing 1/3 by an arbitrary positive value s (with s < 1) is equally safe, giving π/2 − 2 arctan(√ s). This, too, has a finite limit as s goes to zero, namely π /2 ...